Question about 1994 Pontiac Grand Prix

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1994 pontiac grand prix turns over,getting fire,power to all crank and cam sensors. is getting fuel pressure but will not start or run. would like to know what to do? need to find wiring diogram for the ijectors. thanks animal

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If you "are getting fuel" then why would need to check wiring on fuel injectors? You need to put fuel pressure gauge on fuel rail and make sure it meets the specs for your car. This is assuming you are getting spark at every spark plug. Pull your air filter temporarily and attempt to start car to rule out plugged air filter.
You need spark (at the correct time), fuel (at the correct pressure), and air (through a clean air filter) for a engine to run....if any one of these is missing then it will not run.

Posted on May 01, 2010

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Did you check fuses in vehicle and engine compartment.

Posted on Apr 23, 2010

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1 Answer

My 2000 Pontiac grand prix stop running the other day. It turns over just fine but it won't fire up could it be anything other than the fuel pump. ( I really don't want to change that)


its pretty simple to check for fuel pressure. If there is no fuel pressure than the next step is to check for power and ground at the pump. if those check out then a new fuel pump should fix the problem.

your engine needs 3 things to run. fuel, spark, and compression. if you have fuel pressure than check for spark. if there is no spark than there could an issue with a crank or cam sensor. If the crank sensor is bad than typically there will be no injector pulse as well. after cranking it over a couple times pull a plug and see if it is wet. if it is you know the crank sensor is working and the fuel pump is working and you have a spark issue. If it is dry than there is a fuel delivery issue (fuel pump/injector/injector pulse/etc.)

there are many things you can check very easily to help narrow down the possibilities.

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1 Answer

1999 pontiac grand prix lost power on highway n now it wont start?


run fault codes and check for cam/crank position sensor check that the cam shaft is turning (broken timing belt/chain) Check immobliser operation.

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1 Answer

If 3100 engine is running smooth could the cam shaft sensor be bad in a pontiac grand prix


Not CAM or Crank angle sensor.. Try check supply fuel line pressure n spark plug n ignition coil output.. the ignition coil output should be blue spark n spark jump at least half inch.. But be careful coz its hi tension..

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I have replaced the fuel pump on my 1994 pontiac grand prix with the 3.1 litre v6. But it does not seem to be sending the fuel to the motor? In the instructions it says something about the oil pressure...


Are you sure that the fuel pump is properly installed? Have you tested the fuel pump circuits to see if they are working properly? Did you also replace your fuel filter? (It could be totally clogged up) Have you checked to see if there is any fuel pressure at the fuel rail or are you just assuming that the pump is not delivering fuel to the injectors? Have you checked your fuel injector circuits for power and for injector pulse from the EngineControl Module? Have you scanned your Engine Control module to see if you possibly have a Crank Sensor or Cam Sensor problem?

The oil pressure switch only keeps the fuel pump running once the engine starts. The fuel pump should run for 2-3 seconds when you turn the ignition switch to the "Run" position to prime the injectors. The oil pressure switch is the problem only if the engine will not continue to run on its own after it starts up.

Jan 24, 2011 | 1994 Pontiac Grand Prix

1 Answer

My grand prix is running very rough..and back firing


numerous things can cause this. Plugged up catalytic convertor, bad ignition module, incorrect fuel pressure because the fuel pump is about shot and even emmission sensor related.

Apr 21, 2010 | 1994 Pontiac Grand Prix

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I would start with the crank sensor. Have you scanned it for codes? When it dies will it start right back up or do you have to wait till it cools off?

Jun 25, 2009 | 1994 Pontiac Grand Prix

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97 grand prix gtp starts then immediatly dies


If you have a GTP these engines use a hi output fuel pump. they use a fuel pump resistor located under the battery tray (look up from under the car) This resistor lowers the voltage to the fuel fump when not in boost mode. because of its locatoin it is prone to corrosion. if you bypass the wires and the engine starts and stays running replace the resistor

May 13, 2009 | 1997 Pontiac Grand Prix

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