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Old 01-04-2007, 12:27 PM   #6
jay442
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Join Date: Jan 2007
Location: Greensburg, Pennsylvania
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Re: 94 Olds Cutlass Perplexing EGR Problem?!?

Well, got the car started again - seems to be ample exhaust coming from the pipe - but that is of course subjective. Car is stuck in parking lot right now so getting it up off ground where it sets to disconnect cat is probably out of the question - it would have to be towed somewhere.

I did notice that the pulsing of the exhaust gas that is blowing by the EGR valve coincides with the firing of the cylinders - but again that could be just due to plugged exhaust.

Good idea on removing O2 sensor to open up a little more hole in exhaust - that I can get to alot easier.

This car was a handme down from grandma for my daughter. It did have a blown head gasket at one time and she drove it with coolant in the oil. Engine was flushed, rad flushed and new gasket installed but I have no idea whether they resurfaced the head at replacement - and she can't remember anything + no records. I'm going to check manifold vacuum also to make sure pressure is not coming from intake side of EGR valve.

Fuses all check out fine. I removed electrical connector from EGR and it made no difference - car ran the same. Upon probing the connector I found 13v between center post and bottom post of 'Y' ONLY there was no voltage present between center post and either of the posts on left or right leg of 'Y' - course I don't know if there is supposed to be - that would mean that all (3) solenoid pintles are open during idle - which would dump a ton of exhaust gas back into intake - I wouldn't think the car would run well with that much dilution at idle...
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