Stalling. when i stop or if it sits too long. Changed EGR Valve and comp for it and lil black cylinder behind it i call it the vacuum. When i stop i have to do a two foot stop to keep the revs up but when im driving an di let go of gas liek to coast it revs to 3000rpms and stays that way for 5-10secs. too long
let me know thanks everyone
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You may have a vacuum leak at the EGR valve gasket. They took the EGR valve off your car to replace the head gaskets. It will be a free repair, because they caused the problem by not reinstalling a new gasket when putting the EGR valve back onto the engine.
Try replacing your Idle Air Control valve. I am a former Ford tech and have two LTC's a 94 and a 96. I have had to do this job on both. When they get up in miles, the IAC valve gets carboned up and can't adjust the air/fuel intake mixture under load. If you still have a stalling issue after that, then you will probably have to replace the EGR valve as well. But it is very important that you start the engine with the old EGR valve removed so you can blow any carbon balls out of the EGR passage before installing the new EGR valve. Otherwise you will just end up plugging and ruining the new EGR valve and have the same stalling issue. Good luck!
Do a compression test on all of your cylinders when it is cold. Backfiring is a sign of a worn valve seat allowing mixed fuel and air (lit by spark) to be forced back into the intake. You will probably see compression loss on one or more cylinders.
Also... there is a chance that the EGR valve is not totally seated when the engine is cold with just a small blow by. The EGR valve seats coke up over time with black gunk.
Look for a possible vacuum leak Use can of carburettor cleaner carefuly sprayed around inlet manifold and around injector seals.Spray with engine running and engine will instantly react to any leak no matter how small.Dont allow fan to blow onto paint as carb cleaner will damage it.