Question about 1995 GMC Jimmy

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My egr valve wont open complete is there an vacum assit available??

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Do this egr valve is electrically operated. If your not getting enough egr flow .you can remove the egr valve and clean the passage way. Un-pluging the egr and taking the two 10mm bolts out of the egr valve. You can the use a pipe cleaner and carburetor cleaner to clean the passage way out of the excess carbon.

Posted on Aug 30, 2010


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Oil leak

Check if the oil is coming from somewhere else. There is no oil or oil passages at the egr valve. The vacuum diaphragm is a ported vacuum signal (from just below the throttle valve, ported vacuum means it only gets vacuum when the throttle plate is opened by the gas pedal-like off idle). The valve is mounted in the intake manifold, and the exhaust gas reaches the valve from a pipe from the exhaust manifold. There just is no oil around the egr valve.

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sounds like a vacume leak. any engine light? the egr wont effect idle or starting. maybe the throttle position sensor or maf sensor. also check airfilter. there should be i engine light if any of these things are wrong including the egr valve.

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Where is my egr valve

the EGR , is valve connect between intake and exhaust mafold have difram to move open and close . look to intake manfold and one pipe (metal) white coler with two bolts braket in exhaust manfold and have around difram valve with vacum hose line .

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Ford Taurus. Check Engine Light Code P1400

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1 Answer

I have a 99 Windstar 3.8L Keep getting DTC PO401 have replaced DPFE EGR Valve and EGR tube still keep getting Code PO401

Does the egr vavle open ? You will need to use a scanner to test the dpfe voltage when the egr valve is energized you should read around 3.5 4.00 volts. Also you could remove the vacume line from the egr valve and with the engine running you should see around 100 rpm drop in engine rpm at least this would indicate the egr valve is capable of flowing egr gases through the system to the cylinders.

May 30, 2010 | 1999 Ford Windstar

3 Answers

I have a 99 f150 that has a code showing its p0402 egr valve excessive flow the engine is a 5.4 how do i fix it

First make sure all lines are connected to EGR , if not ,connect them if they are? Then remove EGR value and clean and reconnect.

Jan 24, 2010 | 1999 Ford F150 Regular Cab

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well the egr could be stuck open acting like a vacum leak,,,and causing the car to stall,,,you need a new egr,,,,check the wires and if any vacum hoses that go to it,to make sure they are good and connected first,if so replace the egr,,,,it could be false dtc for MAF sensor,,,

Oct 14, 2009 | Pontiac Firebird Cars & Trucks

1 Answer

Egr valve

If you can hear the air leaking out then it is bad. Means the valve is stuck wide open and not closing at all like it should

Feb 14, 2009 | 1994 Pontiac Bonneville

2 Answers

2000 mazda 626 engine light is on took it to the dealer found an egr valve problem they "fix" it light went on again took it back they check it found that the manifold was bad "fix" it...

do you see if the manifold was cracked? usually the problem is not just the egr valve it has a modulator it is either electronic or vacum controlled, now the right way to check or the first thing to do is if there is vacum at the valve and from there check to see if there is vacum at the egr valve only wheren you rev the engine aroun 2000 to 2500 rpm , but i suggest you not to rev the engine at this rate too long if the valve opens thne the next thing to do is remove the valve and makd sure that the egr port is not clogged up with carbon if it is plugged up you can just knock them off using a small screw driver or such and clean the passage with a wire brush and put the valve back always make sure that you put it back using a new egr valve gasket.

regarding the noise make sure that all other tubing that go from the exhaust manifold is not broken it is not just the muffler that is involved in the exhaust sys that keeps the noise down!!!

Nov 14, 2008 | 1999 Mazda 626

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