What can be wrong? - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 10-13-2005, 12:07 AM   #11
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Originally Posted by BillBoost37
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Nick, remember, I have the '97 FSMs if needed
Nick...I told Bob to start driving

He'll help ya out.
Bill...thanks for the recruiting mission, but Nick already knows I would be there if he wants me too.
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Old 10-13-2005, 11:01 AM   #12
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Originally Posted by bill buttermore
A dirty fuel filter would restrict the flow of fuel to the engine. This would be especially noticable when there is a high demand for fuel. If it runs smoother when you accelerate heavily than it does when you accelerate easily, that would not suggest that the fuel supply to the engine is being restricted by a dirty filter. What changes between heavy and light acceleration is vacuum.

Check all around the engine for a rubber vacuum hose that is broken, disconnected, rotted, etc. Look especially at the vacuum lines that run from the throttle body to the vapor canister.

Some other things to consider from the '95 FSM section on Hesitation, Sag, Stumble.
Symptoms defined as: Momentary lack of response as the accelerator is pushed down. Can occur at all vehicle speeds. Usually most severe when first trying to make the vehicle move, as from a stop sign. May cause engine to stall if severe enough.

binding or sticking tps
oxygen sensor not grounding on threads in exhaust manifold
improper fuel pressure
EVAP canister purge for correct operation
contaminated fuel
fuel injectors
bad ignition system ground
alternator output voltage incorrect
air leak between MAF sensor and throttle body
I guess this is where I will begin looking, from the top down........
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Old 10-13-2005, 11:04 AM   #13
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Quote:
Originally Posted by Echo SSEI
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Originally Posted by BillBoost37
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Originally Posted by Echo SSEI
Nick, remember, I have the '97 FSMs if needed
Nick...I told Bob to start driving

He'll help ya out.
Bill...thanks for the recruiting mission, but Nick already knows I would be there if he wants me too.
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