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How to replace an egr valve in 1989 wrangler 4.2 6 cyl?

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Posted on Jan 02, 2017

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SOURCE: EGR Valve and Cyl. 5 misfire.....???


If this is an electronic EGR valve which is opened and closed by the PCM, then it may simply have to relearn the fully closed setting for idle, and it can sometimes be done by switching off the ignition, disconnecting the wiring plug from the EGR valve, and then resetting the fault codes with a scanner.

Now here's the important bit, the very second the scanner tells you the fault codes are cleared, quickly switch off the ignition. This will prevent the PCM from setting another code.

You can then reconnect the EGR valve and hopefully the lesson will be steadfast in the PCMs memory!

As for the cylinder 5 misfire, if it is still misfiring then you need to check for spark, fuel, and compression in that cylinder.

Run the engine for a minute and then whip out the no.5 spark plug. Is it dry or covered in fuel? If its covered in fuel then you have a spark problem, and if its dry then you have a fuel problem.

If its a spark problem and the plugs each have their own coilpack, then it is very highly likely the coilpack at fault, and in which case it is best to fit a new plug as well as a coilpack.

If its a fuel problem then it is very highly likely the injector at fault but you should check for a supply and earth pulse at the injector before condemning it, because sometimes the injector loom becomes crimped and damaged.

It could be a compression problem, but I doubt it, however, just to be safe you may want to carry out a compression test on that cylinder before throwing parts at it.

An easy way of determinig injector and coilpack faults is to move the suspect part onto another cylinder and see if the fault code follows it. If it does then you know that component is faulty.



Posted on Jun 23, 2008


SOURCE: Difficulty to replace EGR valve in 1999 totyota camry 4-cyl automatic

If you have small hands it can be easy. The space between firewall and EGR is tight but it wasn't too difficult to remove. The vacuum hose at the bottom was hard to pull off and I ended up cracking it and had to splice it. It was more difficult to re-install the EGR then remove it. I had a difficult time with keeping the gasket aligned while bolting it in to the lower tube. I took a few attempts. I suggest when replacing the EGR leave the mounting bolts loose so you can more easily align the metal tube. I would tighten the metal tube at the bottom of EGR first then tighten the upper two mounting bolts on top. It took me about 5 minutes to remove and 15 minutes to replace. I would be sure to clean the IAC too after cleaning the EGR. I sprayed throttle bottle cleaner down the bottom hole located on the throttle body and let soak about 15 minutes then start and run the engine a minute and repeat the process. This helped smooth the idle while stopped at a light. It also stopped the idle from shaking and almost stalling the car out at a traffic stop when the engine was warm.

Posted on Jul 10, 2008

  • 11 Answers

SOURCE: 97 acura cl, 4 cyl

If they checked and that is your problem don't clean it change it pay once now and you will not have to pay to clean it and after 2-4 months you will need a new one.

Posted on Dec 21, 2008

  • 6674 Answers

SOURCE: OBD code 0401 (1997 Toyota Camry 4 cyl)

There is a VSV (vacuum switching valve) , usually mounted on the back side of engine block, under the intake manifold, as well as the map sensor, that can also cause that code if one or the other is faulty. It takes some pretty detailed troubleshooting to confirm this in some cases, so if that's not in your line of work, you may have to have it properly diagnosed, or take a 50/50 shot at which one first.

Posted on Jan 24, 2009

  • 58 Answers

SOURCE: Check Engine code P1409

do you live in an are where the gas has alot of ethenhol? if so you might just have a build up of carbon in the exhaust tubes ie: egr return lines intake and all tubes.

Posted on May 20, 2009

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why are you replacing the bellhousing?,it means you are going to have to pull out the motor or the gearbox/transfer case,whichever is easieast

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How to check for bad EGR valve on a 2001 4 cyl gas Sonata

Remove EGR Valve and replace with homemade plate and gasket. If your bucking and sudden accelerations disappear, problem solved but install new EGR for best emmisions long term performance.

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1989 jeep wrangler, motorcraft 2100 upgrade(carb), runs VERY bad, hesitates upon acceleration etc..ran like the before the new carb only not as bad. What could the problem be?

If you barely push the throttle and it's sputters, try unplugging the EGR valve and see how it runs.Make sure you have vacuum to the EGR valve.Start engine and on the outside see if you can put your finger under the EGR valve and see if it sucks up. Be careful and not let the engine get to hot when you do this test.

Jan 21, 2013 | Cars & Trucks

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1999 toyota camry 4 cyl check engine light on code reader said egr valve

A common problem for egr failures are the modulator valves, the valve is attached directly to the egr valve, it's a round plastic housing with three vacuum lines on it, try replacing this valve.

Jan 14, 2013 | 2001 Toyota Camry

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Runs rich at idle and feels like it runs on 3 cyl under load.

check egr valve for mechanical problem,rusted mount,bent or missing actuating rod. if so a new valve will be needed.

Aug 10, 2011 | 1989 Jeep Wrangler

1 Answer

I have a 92 wrangler 4 cyl. it only after warming up misfires and idles really rough. it doesnt do it when its cold. i have replaced the cap,rotor,plugs,wires,02 sensor,and coil. i was just on this site...

Well if it does it after warm up then yes it is more than likely a coolant temp sensor gone whacko or its the thermostat that may be stuck when trying to expand. Other than that the stuff that you replaced should have fixed it. Have a good one!

Feb 21, 2011 | 1992 Jeep Wrangler

1 Answer

Wont idle


Jun 10, 2009 | 1989 Jeep Wrangler

1 Answer

92 Jeep Wrangler will not Stay running.

I had the same prblm with my 1989 Jeep, 6 cyl straight, and it was because of the EGR valve, easy to replace and not too costly. EGR valve is screwed on the motor, driver side, and there is a ±1/2" rubber hose attached. Easy to see if device comes apart, cut by rust.

Mar 18, 2009 | 1992 Jeep Wrangler

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