Egr Solenoid Vacuum Leak

Switch Valve or EGR Solenoid and an EGR Vacuum Modulator. I plug it back in and after a couple minutes it does the stumbling again. 8L V6, as the V8 has all the parts in different locations. If a vacuum diaphragm inside the EGR valve is leaking, the vacuum will drop. The Exhaust Gas Recirculation Valve (also known as EGR) is a key component of the secondary emissions control system. One side of the EGR vacuum solenoid (the one that has only one vacuum inlet port) connects to the vacuum port labeled with the letter J on the throttle body. Buy a 2004 Audi RS6 EGR Vacuum Solenoid at discount prices. In addition, it is compliant with legislation. If air cannot pass through, neither can vacuum and the valve is closing properly. One side gets either manifold or ported engine vacuum. EGR isn't needed when the engine is cold, only when it is warm and under load. Friend, sounds like you have a vacuum leak. A faulty EGR valve or related component may leave the valve in either the stuck open or stuck closed position. Has anyone been able to link this small vacuum leak to driveability issues ? and I see this post was April 2018 what was your outcome ?. Vacuum Solenoid Block. Cooler is always better inside your engine. Plus, each TechSmart EGR transducer matches the OE part for flow rate and port angle exactly 1 to 1. EGR System General Information "I've heard that the car will run fine without EGR, and that performance may actually improve.



The best car technicians and inexperienced carburetor tinkerers have used this verbiage "internal Vacuum Leaks" in the carburetor to explain what they could not find or explain. Hook up a vacuum gauge. Skip to main content DK70682 2011-2016 PORSCHE CAYENNE EGR VACUUM PURGE SOLENOID VALVE HOSE. A stuck open or leaking EGR valve creates a vacuum leak which would cause a lean condition. The vacuum lines running from the plenum to the H-Connector, Boost Control Solenoid (BCS), and rear Wastegate (WG) The vacuum lines running to the EGR valve The vacuum lines running to the small bundle of hardlines beneath and to the passenger side of the EGR ( note: these hard lines connect the BCS and EVAP solenoid to the front wastegate and. My question is, why would it run fine with the egr blocked off, when there is a vacuum leak at the intake manifold? Does that mean the egr valve is bad and the vacuum leak is not the problem? I'm just trying to pinpoint the problem. The PCM looks for a drop in intake manifold vacuum when it opens the EGR valve to test the EGR operation. Cleaned EGR ports + center 'feed' port running down middle of intake in the LIM (none were clogged) Removed and cleaned T/B along with EGR port (squared opening) Replaced exhaust manifolds w/ Dormans (originals had small leaks in the welds at the primaries) When I apply vacuum to the EGR valve with engine running, the car stumbles pretty bad. Also run your finger lightly around the parameter of the EGR block off plate and listen/feel for air leaks. Note that at 0% duty cycle (which means no electrical signal applied), the EGR vacuum regulator solenoid will still. The EGR Valve position sensor may be as well, but if it keeps giving you EGR codes after replacing both then you can just put your little gasket on from your original EGR vacuum solenoid on the new one, for a total of Two gaskets and don't super-torque the little bolts. Apply 10" Hg of vacuum with the pump and watch the gauge on the EGR valve side of the solenoid. If the computer detects an issue with the EGR solenoid, circuit, or system, it will set off the Check Engine Light to notify the driver of the issue. 3JTD 2009 Black Smoke EGR/Vacuum Solenoid/De-coke etc. egr solenoid C/K Car Forums. PM's Senior Automotive Editor, Mike Allen, outlines the tools and techniques proven to smoke out even the. Thank you all for your input and helping me learn how the system works. the actuator works by duty cycle, the more vacuum needed the more time it is connected to vacuum rather than free air it does it a lot of times a second, so the vacuum is a function of the duty cycle, 50/50 gives half the vacuum, that way the actuator on the turbo and EGR can be controlled with a fine degree of accuracy.



Perform a functional check of the bypass flap of the EGR cooler. A vacuum leak can also be created if the purge solenoid, or any of the hoses that may be attached to it break or become damaged. EGR: Exhaust Gas Recirculation EGRC/EGRV: EGR Vent/EGR Control EXH HCV: Exhaust Heat Control Valve EVP: EGR Valve Position EGR: Valve Position EVR: EGR Vacuum Regulator; also called EGR Vacuum Solenoid FLTR: Filter FPR: Fuel Pressure Regulator (check vacuum line) HEAT VLV INT: Heat Vacuum Control Valve Intake, (next to carb) HICV: Hot Idle. The fuel injection computer is the one that regulates the opening and closing of the EGR valve thru' the application and release of vacuum (through a vacuum solenoid). I have an 89 chevy caprice with a 305 v8 engine in it. The EGR system also needs a vacuum source. Connect a Vacuum pump to the top port of the EGR solenoid. EGR code P0400 1997 Chevy Camaro LT1 I keep getting a PO400 code. It always happened during a long drive but the next time I would start it up, the light would be out. Code 33 - Insufficient EGR flow detected. Buy a 2004 Nissan Frontier EGR Vacuum Solenoid at discount prices. Note that at 0% duty cycle (which means no electrical signal applied), the EGR vacuum regulator solenoid will still. Everything before the valve is positive exhaust pressure. P0402 Toyota Code Definition Excessive EGR Flow Symptoms: Check Engine Light will illuminate In most cases, there are no adverse conditions noticed by the driver In some cases, there may be performance problems, such as dying at stop signs or rough idling, hesitation, misfires or lack of power (especially during acceleration), and a decrease in…. What are the symptoms of code P0400?. An engine vacuum leak is a malfunction that has to be corrected in order for the engine to operate at full efficiency. Then, unbolt the valve, and clean the return tube and entry port using carburetor cleaner, and a toothbrush or pipe cleaner. If the needle is lower, is jumping up and down or steadily dropping, you have a vacuum problem. However, you should first check for vacuum leaks, check that all vacuum lines are properly routed, check the harness connector at the EGR solenoid with a voltmeter, and make sure that the EGR passages are not clogged with deposits. I've tried replacing the egr, and various o2 sensors with no luck.



PM's Senior Automotive Editor, Mike Allen, outlines the tools and techniques proven to smoke out even the. its measured by the device on top. One side of the EGR vacuum solenoid (the one that has only one vacuum inlet port) connects to the vacuum port labeled with the letter J on the throttle body. The EGR Valve Control Solenoid regulates the amount of vacuum supply to the EGR valve, allowing the EGR valve to remain open or closed depending on engine operating. Remove the EGR valve and test it for leaks. I used a scavenged vacuum line from the AIV solenoid that was no longer needed. This is a vacuum leak you can't hear when the engine is running. I have the new solenoid (Borg Warner)and though I would test it to make sure it's good before I install. The next step is to allow your engine to completely cool down, disconnect the battery, and wait 5 minutes while the system fully discharges. It should read the same vacuum that you are applying. The solenoid contains a coil which magnetically controls the position of a disc to regulate the vacuum. A consumer may think that there is a problem with the ignition, but an engine vacuum leak is something a little bit more. P1409 Meaning This test checks the electrical function of the Exhaust Gas Recirculation Vacuum Regulator (EGRVR) solenoid. Either way, the problem does sound like an intake leak somewhere. lightly brushing your finger over the sealing surface will change the pitch of the rushing air sound if there is a leak where your finger is.



I dont know if that is the way its supposed to be or what. Check Engine Light comes on. If it activates at the wrong time it. Plus, each TechSmart EGR transducer matches the OE part for flow rate and port angle exactly 1 to 1. EGR valve number for Standard is EGV328, GM number for an 86 305 is 17113433. An EGR valve that is stuck open: When the EGR is stuck open, it will lead to a vacuum leak which in turn causes inefficient combustion, hesitation, rough idling and even stalling. After 2 years and having the burb at 2 different shops with no result to the surging idle, I stumbled upon the answer at a Ford site. The EGR valve is a component of an automobile's exhaust circulation system that reduces pollution-causing emissions. Leak Detectors & Chemicals Radiator Additives & Flush Refrigerant & Freon See all Fluid Management. An illuminated Check Engine Light is another symptom of a bad or failing EGR control solenoid. Air should not pass through. Like Arfur said, you need to 1. As far as the 49 that is probably a vacuum leak the most common places on the car is the pcv hose that runs down to the intake. Plug the line going from the solenoid to the throttle body, and see if your problem goes away. i put the car on my hoist (yes im a red neck) and chked the actuator on the egr cooler. I probably accidently knocked it off while working on something.



you just ran so you can put a "T" on it and run a very short vacuum line to the bottom of the EVR\EGR solenoid: From the T you connect a short vacuum hose to the bottom of the EVR solenoid, Pic: Then run a vacuum hose from the top of the EVR solenoid where the green line used to be (see pic above) to your EGR valve. Looking for the right Egr Vacuum Solenoid today? Find your next Egr Vacuum Solenoid and other auto parts and accessories for sale on Ebay today. A leaking EGR valve could cause rough idle, stumble, etc. Most of the time, the problem is the temperature switch that is bad. 9L 1998, EGR Valve Control Solenoid by Dorman®. To test, apply voltage to the solenoid or swap with a known good unit. When it comes to your Ford Escape, you want parts and products from only trusted brands. But then you purchased an EGR valve, so thats probably not it. The best part is, our Ford Escape EGR Vacuum Solenoid products start from as little as $31. P1441 - Audi Exhaust gas recirculation (EGR) valve/solenoid, Bank 1 - open circuit. Hold the EGR valve so the cleaning spray drips away from the electric solenoid and vacuum motor. Question about EGR/Vacuum leak/ Smoke test. 1998-99 Mitsubishi 3000GT EGR Vacuum Switching Valve Soleno. Failed, or failing PCM. The fuel tank pressure (FTP) sensor detects a low fuel tank pressure resulting from a large vacuum leak or a restriction in the vacuum supply to the fuel tank. To prevent the EGR valve from opening when the engine is cold, the vacuum line to the EGR valve may be connected to a parted vacuum switch or a computer-controlled solenoid. Outbound is Line 3. An illuminated Check Engine Light is another symptom of a bad or failing EGR control solenoid.



I dont loose an. P0402 Toyota Code Definition Excessive EGR Flow Symptoms: Check Engine Light will illuminate In most cases, there are no adverse conditions noticed by the driver In some cases, there may be performance problems, such as dying at stop signs or rough idling, hesitation, misfires or lack of power (especially during acceleration), and a decrease in…. Buy a 2004 Nissan Frontier EGR Vacuum Solenoid at discount prices. In the 1980's, computer-controlled solenoids. The solenoid contains a coil which magnetically controls the position of a disc to regulate the vacuum. today we are gonna show you this simple common fix on the ford 5. Should an egr valve diaphram hold a vacuum - Chevrolet 1995 C1500 question noise stops you have a vacuum leak in the egr diaphram. DORMAN OE REPLACEMENT EGR VACUUM REGULATOR SOLENOID CONNECTORS. Here is the PRVR solenoid still attached to the bracket. It then closes off both solenoids and monitors the vacuum in the fuel tank via a sensor mounted on the top of the tank. wont hold vacuum at all! This was with the car off,key on, and engine running. An illuminated Check Engine Light is another symptom of a bad or failing EGR control solenoid. If the purge solenoid turns on and off with a pair of jumper clips then test then remove the purge solenoid from the car and use a 1 ft length of (IIRC) 1/4" fuel line on the intake port of the purge valve and suck on it. It idles slightly rougher but then I tried tapping the throttle from idle and it doesn't stumble at all. Look for vacuum leaks, cracked vacuum lines, failed EGR vacuum regulator.



I then undid the one bolt holding the egr vacuum solenoid twitted it slightly and then connected the hose back on. EGR valves on diesel vehicles have large opening cross-sections • Leaks in intake manifold Troubleshooting in exhaust gas. Replace the EGR valve. For this reason, the EGR valve should not open until the engine is warm and above idle speed. Buzzing vac box means it knackered, mine did this after egr delete, new box cured it. the valve only is opened during cruise rpm range. If the vacuum lines are color coded, the line that is green is the one that usually connects to the intake manifold and is the one that feeds vacuum to the EGR Valve Vacuum Regulator Solenoid. The EGR may be a fluke, can be a flow problem or vacuum leak that sets it off. An excessively large vacuum leak can result in engine performance issues such as a decrease in power, acceleration, and fuel economy. Mazda B2200 Carbureted Vacuum Diagrams: Here you will find a collection of the most complete vacuum diagrams for the Mazda B2200 anywhere on the internet. 6% similar) Please note that the images used are provided by the manufacturers to. Many of the old EGRs are being discontinued. Choose top quality brands Genuine, Pierburg. The vacuum leak could be throwing off the o2 reading. The clerk told me that could be a bit of a problem to change as it was around the gas tank but he wouldn't do.



I have the new solenoid (Borg Warner)and though I would test it to make sure it's good before I install. This vacuum source goes to the EGR solenoid, which is triggered by the ECM at the proper time to actuate the EGR valve. EGR Solenoid Valve Connector; EGR Vacuum Regulator Solenoid Connector; EGR Valve; Electronic Spark Control Module Connector; Electronic Vacuum Regulator Valve Wiring Connector; Emergency Vehicle Light Connector; Engine Cooling Fan Clutch Switch Connector; Engine Crankcase Breather Connector; Evaporative Emissions System Leak Detection Pump. Connect the hand pump with vacuum gauge to the No. If the problem goes away then you know its an EGR problem, otherwise, look elsewhere. If the expected vacuum drop is insufficient or not there, it will set P0401. Then, unplug the 2-pin weatherproof connector and test it for proper power and signal. If the previous checks are OK: Replace the exhaust gas recirculation cooler (throttle return spring of bypass flap may. With solenoid-type purge valves, voltage can applied directly to the solenoid to see if the valve opens. Symptoms of a Bad or Failing EGR Solenoid Check Engine Light may illuminate. I have a Vectra 2. Emission Repair Manual. The EGR solenoid has two vacuum nipples. We have over lots of customer reviews on Ford EGR Vacuum Solenoid to help you find exactly what you need. Understanding the ABS sign on your dashboard. If not, you should check the hose from the solenoid to EGR valve for leaks or your solenoid could be bad. It could be either the solenoid valve, hose or the EGR valve, position sensor. Possibility 2: Vacuum Leaks Another possibility common to all 2000 to 2004 Ford, Lincoln, and Mercury products is a vacuum leak.



I would not buy parts until you do some testing. anyone know off hand?. The reason for this is that the car cannot combust on the carbon dioxide emitted from the tailpipe. Remove the EGR valve and test it for leaks. Yes the 32 is egr and is most likely the egr solenoid and or the egr valve not holding vacuum. The car runs OK. '93 Chevy Silverado EGR Solenoid Replacement Diagnosing and replacing a faulty EGR valve with a vacuum leak. Follow the vacuum line from your intake manifold to located the EVAP canister purge volume control solenoid. If the EGR solenoid is acting erratic then it would be felt at the EGR valve, when activated. Yeah, I would try replacing the EGR solenoid if you are not getting any vacuum to the EGR valve. I probably accidently knocked it off while working on something. If the computer detects an issue with the EGR solenoid, circuit, or system, it will set off the Check Engine Light to notify the driver of the issue. STANDARD MOTOR PRODUCTS VS2 EGR Valve Control Solenoid / Motor ALL THE PARTS YOUR CAR WILL EVER NEED ® Show Prices In US Dollars ($) Australian Dollars (AU$) Brazilian Real (R$) Canadian Dollars (CAD$) Swiss Francs (CHF) Euros (€) British Pounds (£) Japanese Yen (¥) Mexican Pesos (Mex$) Norwegian Krone (kr). It would then open, allow vacuum to the diaphgragm, the EGR valve would move, changing the resistance of the feedback sensor, signal the computer 'where it was', and the computer close the 'apply' solenoid, and leave the 'dump' or 'hold' solenoid alone. > Solenoid voltages: electronically controlled EGR valves could use one or more solenoids to control de valve aperture movements (open/close).



The vacuum lines running from the plenum to the H-Connector, Boost Control Solenoid (BCS), and rear Wastegate (WG) The vacuum lines running to the EGR valve The vacuum lines running to the small bundle of hardlines beneath and to the passenger side of the EGR ( note: these hard lines connect the BCS and EVAP solenoid to the front wastegate and. Although we endeavour to ensure that the information contained on the website is accurate, as errors may occur from time to time, customers should verify any information in question with a dealer. egr solenoid is the most common problem. 9 EGR solenoid, this vacuum leak may be normal. need any vacuum or solenoid valve. EGR valve gasketTechSmart TechSmart Tip: To complement the repair kit, check out TechSmart’s B22001 EGR Tool Kit. 8L V6, as the V8 has all the parts in different locations. Shop safely with us online or call 888-844-3393 and buy the quality part your car or truck needs today. Lots of stuff under the hood is vacuum controlled. Would a vacuum leak cause poor fuel economy too? I guess if the EVAP leak uses vacuum, that could be the cause of the light. the solenoid controls vacuum to the EGR valve itself. Get the job done with the right part, at the right price. The procedure is different depending on the car make and model. If vacuum solenoid valve is bad, a different code is usually set for this component. remove air filter housing b. Also run your finger lightly around the parameter of the EGR block off plate and listen/feel for air leaks. The best car technicians and inexperienced carburetor tinkerers have used this verbiage "internal Vacuum Leaks" in the carburetor to explain what they could not find or explain. The EGR control solenoid may be an on-and-off type switch, or it may be a modulated-pulse width type.



If the EGR valve opens and the vacuum holds for more than a minute, the EGR valve works. If the vacuum lines are color coded, the line that is green is the one that usually connects to the intake manifold and is the one that feeds vacuum to the EGR Valve Vacuum Regulator Solenoid. The EGR system also needs a vacuum source. An illuminated Check Engine Light is another symptom of a bad or failing EGR control solenoid. To set the record straight…CARBURETORS DO NOT HAVE INTERNAL VACUUM LEAKS. The electronics can be tested with a basic multimeter. An excessively large vacuum leak can result in engine performance issues such as a decrease in power, acceleration, and fuel economy. DORMAN OE REPLACEMENT EGR VACUUM REGULATOR SOLENOID CONNECTORS. We work hard to build a great website for car parts, so start perusing and see what you find. 6% similar) Please note that the images used are provided by the manufacturers to. I probably accidently knocked it off while working on something. One side of the EGR vacuum solenoid (the one that has only one vacuum inlet port) connects to the vacuum port labeled with the letter J on the throttle body. 2002-07 Mitsubishi Lancer EGR Vacuum Switching Valve Solenoid for L4 2. Page 2- What causes ALH EGR valve solenoid vent oil leak? VW MKIV-A4 TDIs (VE and PD) changed all vacuum lines, checked for boost leaks, etc. See Our Egr Vacuum Solenoid In Stock Now. Also run your finger lightly around the parameter of the EGR block off plate and listen/feel for air leaks. i put the car on my hoist (yes im a red neck) and chked the actuator on the egr cooler. so at idle there should NOT be any vacuum at the valve itself. Remove these vacuum lines and connect the two hard lines at the engine with a new piece.



It's the easy way to do the mod as my car had the water cooled system on the egr so it means not only blanking off the egr pipe but also sorting the pipes out. and circuit, exhaust gas leaks. Also has humming noise from deep in engine compartment. 24 EGR Vacuum Solenoids found. We have over lots of customer reviews on Ford EGR Vacuum Solenoid to help you find exactly what you need. With solenoid-type purge valves, voltage can applied directly to the solenoid to see if the valve opens. For this reason, the EGR valve should not open until the engine is warm and above idle speed. Check the vacuum supply of the changeover valve for the bypass flap of the EGR cooler. remove air filter housing b. Shop with confidence. you just ran so you can put a "T" on it and run a very short vacuum line to the bottom of the EVR\EGR solenoid: From the T you connect a short vacuum hose to the bottom of the EVR solenoid, Pic: Then run a vacuum hose from the top of the EVR solenoid where the green line used to be (see pic above) to your EGR valve. if the solenoid has proper engine vacuum going into it, check the power and ground at the solenoid. All I did was remove the T and small hose to the egr vacuum actuator. To troubleshoot start the engine and open a propane torch near the EGR valve (don't light it though). Nasty smelling exhaust, jumps while idiling at drive through etc from 500-1000 rpms, gas mileage sucks. later, the chances that it still works that way are slim. I have replace egr valve and solenoid and engine idols rough.



If the EGR solenoid is acting erratic then it would be felt at the EGR valve, when activated. The PCM looks for a drop in intake manifold vacuum when it opens the EGR valve to test the EGR operation. I ask because I recall this same issue on my BII. The reason for this is that the car cannot combust on the carbon dioxide emitted from the tailpipe. Im not getting a code or anything. Also check if it is having vacuum in its vacuum hose when energized; check for broken vacuum hose. 7 Years and 91000 K. Vacuum is not allowed to pass to the valve until the engine is warm. P0441, PO446 EVAP Vacuum Switching Valve - Toyota P0442, P0445 Evap Diagnosis and Repair - Dodge P0505, P0507 Idle Air Relearn and Throttle Body Cleaning - Nissan. I think they are seperate problems. The EGR valve also includes a lift sensor, a similar device to a throttle potentiometer. Page 2- What causes ALH EGR valve solenoid vent oil leak? VW MKIV-A4 TDIs (VE and PD) changed all vacuum lines, checked for boost leaks, etc. Perhaps one of the most notable vacuum leak symptoms is a rough idle. Vacuum hoses on the GMC Syclone and Typhoon are not only unique to these vehicles, but very brittle and aging quickly. 2700+ products In Stock, ready to ship at CARiD. Natural Vacuum Leak Detection (NVLD III) This product is used for engine off OBD monitoring for hydrocarbon evaporative leak detection. Perform leak test between vacuum pump and appropria te generic adapter (A) to be used during the testing: a.



Yes the 32 is egr and is most likely the egr solenoid and or the egr valve not holding vacuum. I probably accidently knocked it off while working on something. Under the EGR is where the purge solenoid is located, there should be a vacuum line connected there, use the under hood emission as a guide. The lower port (N1) on the diagram is connected to the triple connector of the black plastic vacuum lime, that comes from the top of the UIM. So, a thorough check of all the vacuum lines and hoses in the EGR system is a good idea. Hi all, they aren't collapsing at high revs and don't appear to have any leaks. Connect a Vacuum pump to the top port of the EGR solenoid. A bad EGR solenoid can cause a variety of different trouble codes, so having the computer scanned for. Vacuum Pump Leak Test: 1. Then, unbolt the valve, and clean the return tube and entry port using carburetor cleaner, and a toothbrush or pipe cleaner. If the EGR valve opens and the engine stalls, check for vacuum to the EGR control solenoid; If vacuum is present on the input side of the EGR solenoid, then disconnect the output vacuum line and activate the EGR system using the scanner; Once the EGR system is activated, a small "tick" should be heard from the solenoid and there should vacuum. Please narrow the EGR Valve Vacuum Solenoid results by selecting the vehicle. If vacuum solenoid valve is bad, a different code is usually set for this component. Control Function at Idle • At idle, the EGR solenoid valve is NOT energized and thus, the EGR valve is NOT open. The AIV solenoid is also T'd into the one of the vacuum lines coming off the EGR solenoid next to it. However, there is another way to test if a blockage becomes the root cause of the EGR codes on Ford pickups. The vacuum that is not directed through this valve is vented through the solenoid vent to the atmosphere. Vacuum hoses over time can become dry and brittle. Under the right conditions for EGR to take place, the ECM earths the path of the solenoid valve and this allows a vacuum source to operate the EGR valve. The rubber deteriorates and can leak causing a vacuum loss.



The best part is, our Ford Escape EGR Vacuum Solenoid products start from as little as $31. It then closes off both solenoids and monitors the vacuum in the fuel tank via a sensor mounted on the top of the tank. If the problem goes away then you know its an EGR problem, otherwise, look elsewhere. 3JTD 2009 Black Smoke EGR/Vacuum Solenoid/De-coke etc. Hook up a vacuum gauge. This is accomplished through an EGR vacuum control solenoid. that goes to a 3 pack of relays. com FREE DELIVERY possible on eligible purchases. An EGR valve that is stuck open: When the EGR is stuck open, it will lead to a vacuum leak which in turn causes inefficient combustion, hesitation, rough idling and even stalling. Look for electrical signal at the vacuum regulator solenoid valves located on the rear of the passenger side wheel well. If the EGR vacuum modulator diaphragm tears or leaks it will disable the EGR system and may cause a vacuum leak. Can I just replace the green hose or do I have to replace the entire assembly (both the red and green lines plus the connectors) from the EGR solenoid to the EGR valve?. and circuit, exhaust gas leaks. Buy a 2004 Nissan Frontier EGR Vacuum Solenoid at discount prices. Check the vacuum supply of the changeover valve for the bypass flap of the EGR cooler. Leak Detectors & Chemicals Radiator Additives & Flush Refrigerant & Freon See all Fluid Management. You will need a vacuum gage and maybe a T- connection to hook into the vaccum line going to the EGR. After 2 years and having the burb at 2 different shops with no result to the surging idle, I stumbled upon the answer at a Ford site. I think I have found it, the only problem is there are 2 identical ones right next to each other and I don't know which one is which!. Vacuum is supplied through an electrical solenoid valve controled by ECM. Egr Solenoid Vacuum Leak.