Question about 1998 Pontiac Sunfire

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1998 pontiac sunfire 2.2 has a flooding problem plugs are turning black and will barley run the only way I got it started was took fuel pump fuse out and in until it started really rough. the vehicle load is at 99percent. tps is responding correctly. Fuel pressure is 59psi before fuel regulator spark is good at 30thousands ckps and tps and fuel regulator have all been changed the last code that it produced was ckps was faulty but I have already changed this and it didnt pop this code till now kinda wandering ecu?

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6ya6ya
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  • 92 Answers

SOURCE: 1999 Pontiac Grand Prix intermittent problem runs rough

i have had two of these problems both on grand prix's , both turned out to be a mass air flow meter. but nethier set a code for the sensor.

Posted on Mar 29, 2009

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roedmondson
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SOURCE: 2001 Pontiac Sunfire Fuel Problem

Are you certain that the engine is getting fuel? If not, then you will have to verify that there isn't any blockage in the fuel system to prevent the fuel from reaching the engine. If fuel is reaching the engine, try the following
1. Check compression values for each cylinder.

2. Inspect electrical circuitry in the distributor assembly (slack wires, broken wires, dmaged rotor etc)

3. Check to see if the timing belt was not severed. This belt transmits the drive from the crankshaft to the camshaft. If the belt ius severed, the camshaft cannot rotate in order to open the valves

Posted on Dec 30, 2008

  • 1 Answer

SOURCE: How to change spark plugs in a 1998 Pontiac Sunfire GT

gt will have a 2.4L DOHC their beneath the cam cover right ontop

Posted on Mar 07, 2009

  • 3 Answers

SOURCE: when starting my 94 suburban, the fuel injectors flood the engine

replace them the seals at the top leak over time. Its throttle body injection and there are only 2 of them and are easy to replace.

Posted on Aug 05, 2009

  • 4088 Answers

SOURCE: We have a 2000 Pontiac Grand Am Se. The car

If this car uses an electrically heated O2 sensor, the heater portion may be bad. If the car has a lot of miles, the O2 sensor may be getting bad also.

Posted on Aug 17, 2009

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1 Answer

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Sounds like a problem with crank, cam or the knock sensor.

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When was last healthy tune up? Plugs, wires, all fluids & filters??? Especially fuel filter? I'd start there and run a good fuel system cleaner through it.

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Jan 24, 2009 | 1998 Pontiac Sunfire

1 Answer

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I assume that you do not have a "check engine" light?

The next thing I would do is check the pressure from the fuel pump. You can have this done at your preferred garage, or by purchasing a fuel pressure gauge from any parts store.

Vent the fuel tank vapors by loosening the fuel cap. Remove the electric fuel pump fuse and start the engine. Allow the engine to run until it runs out of fuel and stalls. After spinning the engine over for a period of 3 to 5 seconds, turn off the ignition switch and install the electric fuel pump fuse. Next, install a fuel pressure gauge in the fuel rail supply line, and secure the fuel tank cap. With the ignition key in the on position, verify that no leaks are present and start the engine. Visually verify the PSI reading on the gauge. The pressure for your vehicle should be 41-47 PSI (Pounds per Square Inch). Hope this helps and good luck!

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2 Answers

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Do a tune up change spark plugs, wires, air filter, pcv ,and fuel filter.

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1 Answer

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This sounds like either the fuel pump has failed or the fuel filter is plugged, another thing that can cause this is a plugged catalytic converter, i doubt the issue is the fuel pump relay.

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1 Answer

2004 Pontiac Sunfire Does crank position sensor control fuel pump?


no, when you turn key on you should hear pump run for 2-3 seconds, if not check fuses, then if fuses are good have someone tapped fuel tank with rubber hammer as key is turned on, if fuel pump runs after tapping tank, replace fuel pump

Nov 29, 2008 | 2004 Pontiac Sunfire

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