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1988 Grand Prix Hesitation Issue
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CarGuru > Pontiac > 1988 Grand Prix Hesitation Issue 11 April 2005 12:33:08

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1988 Grand Prix Hesitation Issue

Paul via CarKB.com 11 April 2005 12:33:08
 I have a 1988 Grand Prix 2.8 liter v6 with a serious hesitation issue. It
exhibits serious bogging, or stumbling whenever you crack the throttle open
under load. Lets say the vehicle is in drive, and you are sitting at a
traffic light. As soon as you step on the gas, it either stumbles or
stalls. However, if you VERY gently open the throttle, it will go fine.
Sometimes, I can get away with maintaining a 1000 RPM brake rev before the
light turns green... this way the engine wont stop in the middle of the
road when I start accelerating. There are no codes, the fuel pressure is
fine and the spark is solid. Keep in mind, it runs fine except when you
start out. I even confirmed proper EGR, MAF and MAP operation. The PROM has
not been updated, but I dont think this is a likely cause. I am considering
an intake manifold leak. If anyone has had a similar problem... please let
me know before I waste my time changing gaskets that arent leaking.

--
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CarGuru > Pontiac > 1988 Grand Prix Hesitation Issue 11 April 2005 12:33:08

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