1990 Buick Regal GS 3.1 multi-P running rough help:(
#1
1990 Buick Regal GS 3.1 multi-P running rough help:(
Hello all! I've replaces the Tps, Iac, crank sensor, map sensor, and cleaned the Egr valve. I was cruising and lost acceleration power completely but it didn't die! I can only go about 30mph and giving it gas it shakes and runs really rough. Won't rev past 2500 RPMs And cuts out really bad. Possible Igition control module? Also there is no check engine light. It works because I pulled the connector off the tps and it throws it right away. Any help would be GREATLY appreciated. I've been stumped forever and don't wanna pour anymore money into it without knowing what to do:/
#2
Senior Member
Have you checked back pressure? Create exhaust leak before cat(remove O2 sensor or loosen exhaust pipe at the ex manifold.....if car now accelerates ok, you need a cat...car will be noisy during this test.....
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Soft Ride (05-17-2015)
#3
I just pulled the O2 sensor and it was very loud but I revved it up and it'* only revs to bout 2000 and only gets worse the more gas it'* given... I'm thinking of checking the coolant temp sensor and the Icm. Any other suggestions would be helpful!
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