Question about 1998 Pontiac Grand Prix

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F/spd cont fuse missing and loosing power when accelerate uphill

Fuel spills over when filling

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Vent valve is stuck closed causes fuel not to fill correctly fuel pump module sucks air on grades to steep for pick up to keep fuel flow steady

Posted on Nov 26, 2014

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6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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2strokeJim
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SOURCE: 1999 v6 firebird misfires on #6 cyl when under load, plug was fuel fouled last time I had it replaced, but keeps missing only when under load. no other problems.

if you've changed the spark plug and no difference, then it's time to swap the coil with another cyl. coil and see if the miss goes to the other cylinder, if it does'nt follow to other cylinder, then I would replace that injector !

Posted on Mar 18, 2012

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1 Answer

My 2000 Grand Prix GT is losing cylinder fire exactly at 60 mph while accelerating every time. Then the Trac warning light flashes once. It runs fine below 60. Noticed no Speed Cont. fuel pump relay.


What engine ? could have 3.1 or 3.8 L No resistor ? for what ?
Noticed no Speed Cont. fuel pump relay. What are you talking about . Are you talking about no control for the fuel pump relay from the PCM/ECM engine computer ? The PCM Energizes the fuel pump relay for two seconds when key is first turned on . Two second prime of fuel system . When cranking the engine the PCM/ECM will only energize the fuel pump relay if it see's an input from the crank sensor .

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Hi Jennifer-
I believe I may be able to help you with the gas spillage you are having when filling the tank. This happened on my 1998 Toyota Camry.
One day, even though I was low on fuel, the attendant had trouble adding gas to my tank. Gas would spill during filling or the nozzle would click off (as though it was full) even though it was not. I had to stand there myself and slowly add gas until the tank was full.
I learned that my car had a thin vent tube that would run from the gas tank to the gas tank opening. As gas is rushing into the tank during filling, the air that is being displaced from the gas tank escapes through this tube. This tube had rusted closed a bit and was restricting the air flow escaping from the tank during pumping causing the problems I described. Once this tube was replaced, my problem was solved!
Hope this helps!

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Sounds like a miss under load, either a weak spark or fuel injector issue.
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EVAP system failure.

http://ricksfreeautorepairadvice.com/evaporative-emissions-system-primer/

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