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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Posted on Jan 02, 2017

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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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 .

Mar 21, 2017 | 2000 Pontiac Grand Prix GT

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Van shakes accelerating


Sounds like a miss under load, either a weak spark or fuel injector issue.
Is the check engine light on ?

May 07, 2013 | Dodge Cars & Trucks

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Stalls when accelerating going uphill


replace plugs,rotor button and cap.

Dec 06, 2012 | 2003 Toyota Tacoma

1 Answer

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 !

Mar 18, 2012 | 1999 Pontiac Firebird

1 Answer

Lack of Power on highway or uphill while driving?


Have the fuel pressure regulator checked out.

Jul 21, 2010 | 2001 Dodge Dakota

1 Answer

Why does my car loose power going uphill


YOU COULD HAVE CLOGGED FUEL FILTER AND FUEL INJECTORS.ALSO CHECK TRANSMISSION FLUID.IF LOW TRANSMISSION WILL SLIP GOING UP HILL.NOT ENOUGH FLUID TO BUILD UP PRESSURE FOR OVER DRIVE.

Oct 06, 2009 | 2000 Buick Regal

1 Answer

No power uphill


"Loss in power" usually means that the combustion chamber in your cars engine is full of carbon. That is left behind because of the unburned fuel. With that type of problem, fuel responses will be slower, poor acceleration, lower rpm, etc. You may overhaul your engine for them to clean the carbon manually, but it'll be expensive and could lead to "loose compression". That means the engine won't be as powerful or responsive as before.

The best way would be to have a carbon ridding solution injected into the engine. The solution will liquify the carbon and other build-ups, which would then restore the "power" of your car. You'll get better acceleration, higher rpm and top speed, etc. have a mechanic do it for you. It's alot cheaper and faster than having the engined overhauled.

John

Aug 08, 2008 | 1986 Hyundai Excel

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