Poor Acceleration
2,325

Asked by Alvin Feb 03, 2016 at 03:19 PM about the 1995 Buick Riviera Supercharged Coupe FWD

Question type: Maintenance & Repair

This question is relative to my 95 Supercharged Riviera. Initially the vehicle was running rough/lopping/surging while stopped in traffic and the code indicated TPS malfunctioning. I replaced the TPS and attempted to reset code but reading was still TPS. So we changed the TPS connectors/wiring and checked other wiring to try and find if maybe there were broken wires..none found, service engine light is still on but not getting a code.
Whereas the rough running/lopping/surging have gone away, the vehicle has poor/slow acceleration. In addition I have removed the
Catalytic Converter and checked/rechecked the fuel pump pressure. Any suggestion(s) will be greatly appreciated.

3 Answers
65,510

firebird338 answered 8 years ago

Check your owners manual and see if your vehicle has this fuse (ETCS) Electronic Throttle Control System fuse. Replace if blown.

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2,325

Alvin answered 8 years ago

Clap!! Clap!! Well my mechanic and I have finally fixed the problem. The problems were in the ECM and that chip. Apparently doing the replacement of after market /replacement ECM's (not always the suggested route to take) the wrong chip was installed. During my research I located via a web site with information listing the correct ECM and appropriate chip for my vehicle. In addition I sought the assistance of the parts guys at our local GM dealer. They were willing to gather much needed information in assisting. The 95 Riviera is performing w/o any problems. I appreciate all of you that offered suggestions.

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