Originally Posted by INSIDIOUS (Post 3375571)

I did catch it all.

Originally Posted by Zulfiqar (Post 3375554)

so you did not actually catch the fluid in a container?

Originally Posted by Zulfiqar (Post 3375557)

GM also use a MAP sensor, it would be a 3x1 inch plastic rectangle with a green connector on it and a vacuum hose attached to it, They are known to go bad. Cheap too. The MAF on that vehicle is tested by measuring Hz - and the two tests for it idle and high rpm actually show the correct working, replacement Delphi MAF elements are not the same design as original.

If you are seeing loss of fuel pressure with captured fuel in the rail - the only two points of leakage are the regulator diaphragm or the injectors - btw injectors are 'spensive' on this car. hunt the yellow pages for a place that sonic cleans and tests gasoline engine injectors.

If you plan to replace the lower manifold gaskets, along with the previous posts you also need to replace the oil pump drive gear O ring (I believe the 3.1 also has it) It lives under the manifold and causes vacuum leaks if its old.

Originally Posted by Simpler=Better (Post 3375608)

In your hair, ears, shirt, nose etc. :p

Originally Posted by Jooseppi Luna (Post 3375708)

This reminds me of an older guy at church (don't his age -- 70?), who grew up in Bangor, Maine. He said that, when he was growing up, they'd just park the car over the ditch and drain the oil out into it :eek:.

I'll look for the MAP sensor, though I can't see one and don't find any mention of it in the FSM.

I hadn't actually tested the MAF signal because I couldn't find the multimeter that I have that reads Hz... however, I just found it, so I'll do that today.

Thanks for the tip on the oil pump drive gear gasket -- I remember seeing that in some stuff I was reading about the job.

Originally Posted by Zulfiqar (Post 3375722)

If you look near the coil packs - you will find a black rectangle piece with the GM logo on it, it would be fastened by 2 screws, that is the MAP sensor.

Originally Posted by Zulfiqar (Post 3376016)

The thing infront of the coil packs is the MAP sensor, its mounted in its correct orientation the wire connector and hose pipe for it points down.

Originally Posted by DieselPaul (Post 3376020)

I'll bet you've got one, even the OBD2 cars with MAFs had both for some reason on the 3800s.

edit maybe not, I got on rock auto, and they don't list a MAP for your car, just a really bizarre looking MAF sensor.

Originally Posted by P.C. (Post 3376024)

His car is a 3100 V6 with OBD I, correct?

Originally Posted by HotZ28 (Post 208561)

That is the Evaporative Emission Canister PURGE SOLENOID WITH 2 PORT VAC-2 blade terminal. IIRC, the 3.1L has a MAF sensor to measure intake air flow and does not have a MAP sensor. A typical MPFI engine will use one, or the other, but seldom both. The S/C 3.8L engine does use both MAP & MAF due to the fact that manifold pressure goes from vacuum to boost during acceleration.