Quote:
Originally Posted by Jooseppi Luna
Just hooked up a fuel pressure gauge I rented from AutoZone to the fuel rail, ran the car, got the fuel pressure up to 38 PSI (spec is 37-48, IIRC), and shut down... within 5 minutes, it had lost 2-3 PSI and was going downhill, so I guess that means there's a leak somewhere. I'm now alternately clamping off fuel lines to try to track it down.
Oh, and I noticed a mild oil leak that's consistent with the lower intake manifold gasket going.
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If thats a 3.1 v6 - I can gurantee that the lower manifold gasket is shot, replace and remember to use proper GM engine sealant or toyota FIPG on the blank space between the 2 gaskets. If you dont and use pep boys/autozone/FLAPS etc gasket maker then you get back to square one faster than a veyron accelerates from 60-100 mph.
The rich running issue is usually a bad MAP sensor or bad fuel pressure regulator.
Another tip - if you are changing the ATF and dont fancy bathing in it then undo the supply line for cooler - (small circlip) and install a hose on it and dump into a bucket. Start engine and allow it to empty the transmission pan for you - now you can get under the car and remove the transmission sump neatly.
If your radiator has the smaller type cooler line fittings then you can buy a barb for it from autozone etc - its about 3 dollars - shove a hose on it and do the same as above.