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Discussion in 'Troubleshooting & Diagnosis' started by Fume, May 11, 2021.
A stock AC Delco.
Before the work. All of a sudden it happened. When I went out for a drive the next day
Wasn’t in storage. I was driving the car almost everyday. I guess it’s time to take the exhaust apart.
Damn, I am suspicious about the exhaust going to take it apart. I’ll probably run straight side pipes.
I like the idea of dropping the exhaust before the mufflers and take it for a rip and see how it behaves. Now, whether that's logistically possible for you is quite another matter.
Don't dismiss it as non-engine problem because it doesn't do anything funny revving it in the driveway, an engine under load will show problems that don't show up in the driveway.
10 psi fuel pressure at idle? Really?
Try to feel the pressure or heat coming out of the end of the exhaust pipe first with your hand.
There wouldn't be much or none at all if it's clogged.
I think this problem would be more likely to cause a stall at idle, but are the intake manifold and exhaust manifold ports clean? No carbon deposits or gasket issues? Assuming you're running factory exhaust and not headers. If you're running headers, intake may still be worth a look. Seen plenty of intakes with tons of carbon buildup something fierce. Have a couple 73-74 Z28 ones for sale, too (shameless plug, lol).
Mechanical advance in the distributor check out okay?