Question about 2001 Pontiac Grand Prix

1 Answer

Ive replaced the fuel pump fuel injectors fuel filter crank sensor coil pack computer spark plugs and the car still WILL NOT START. WHY?

2001 pontiac grand prix gt. 3.8L non supercharged

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  • Zachary Snapp Jan 01, 2013

    I tested the one I have in the car and it is good. Ive gone to the point of removing the intake to check lifters and there is no problem there either. my next solution to the problem is dynamite. thanks though rich

  • Zachary Snapp Jan 01, 2013

    my engine is a 3.8 l non supercharged

  • Zachary Snapp Jan 01, 2013

    ok ive gone to the point of removing the intake manifold to check the lifters and removed the valve covers to check the valve springs and everything is moving as it should. I've got fire and good fuel pressure. still no go. if I take the injector fuse out it will fire up for a second. all the injectors are working but its acting like its getting flooded now what?

  • Zachary Snapp Jan 02, 2013

    ok all..... thank you for the input. the catalytic converter was completely clogged. reemed it and the car now runs fine!

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I have a non starting prob with the same motor. i am going to start with an air sensor

Posted on Dec 31, 2012

  • Zachary Snapp Jan 02, 2013

    check your cat first before you go through everything that I did. what a nightmare

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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SOURCE: 1988 Pontiac Grand Prix will not fire at all

more than likely ur injectors are malfauctioning run some chevron techron injector hope theyre not completely bad

Posted on Jun 15, 2008

polarcycle
  • 1392 Answers

SOURCE: 1999 pontiac grand prix gt 3.8L v6 cranks wont start

Is the security light on? If you have spark and fuel, it should run. Any codes? Could be bad crank sensor or cam sensor.

Posted on Mar 07, 2009

  • 641 Answers

SOURCE: 1990 Pontiac grand prix bogs down, and wants to

Have you checked the ignition module? More info such as eng size would be helpful to help you.

Posted on Aug 02, 2009

  • 1915 Answers

SOURCE: no injector pulse,new battry,fuel pump,crank

my first thought based on what I could see in your description (you cannot see the entire post until you click on it) was the ECU-you have done a check of the fuel pressure, and checked the regulator for leaks, correct? I would try a junkyard ECU (25 to 50 dollars in most places) or on ebay. Also carefully examine the crank sensor connector, and the harness itself for damage-no crank sensor signal, no pulse. ECU's do not normally go bad, but it does happen.

Posted on Jun 28, 2011

SOURCE: I have a pontiac grand prix gt 3800 non turbo is

I have a 2003 Pontiac grand prix...I've lost power, it won't go over 30mph, it doesn't shift thru the gears smoothly. The service engine soon light goes off and on, more so when I'm trying to gas it. Its seems as tho it's 'being choked'...like not getting gas or air. So far, I've flushed the ******, changed the plugs, wires, air filter, fuel filter. I suspect the problem is a clogged cat convertor. I've been told that the exhaust can be opened a little near the cat to allow air to flow in....that should confirm if the problem is the Cat or not. I'm testing that theory today.

Posted on Mar 12, 2012

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1 Answer

Mechanical


Before you threw a bunch of parts at it maybe you should at least see if it has spark. If it doesn't have spark then the crank sensor and coil pack would be appropriate. If it is not getting fuel then the fuel pump, filter, etc. would be the way to go. So see if there is spark, do this by pulling a spark plug and see if there is spark out the end with it plugged into the wire and cranking it over. If there is spark put all this back together and squirt some fuel into the throttle body while cranking it over, if it tries to start but doesn't try to start on its own without squirting fuel in it then the fuel pump is bad. How many miles on it? Possibly the cam timing is off. Maybe take a compression check and see if the cam is out of time.

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In many cases this will be due to a bad fuel pump, a broken timing belt, an inoperative cam sensor or crank sensor. Also this problems are related to faulty spark plug. Check the spark at spark plugs when you start the car. Do you notice any spark. Actually you should see. If in case there is no spark then it's a spark plug problem. Also the coil pack gives power to spark plug. So check the voltage at coil pack. It will show 12 volt.If there is no voltage noticed at coil pack then its faulty coil pack that has to be replaced.If all the possible options checked out ok then check the car starter. The starter gets power from battery to start the care. If the starter is faulty then it will not let the car to start. Also check and confirm that there is fuel in the car. If it very low fuel then in some cases this causes the problem. Also check and confirm that fuel pump is functioning properly and the fuel filter is not clogged. One of the easiest ways to check for a fuel pump related problem is to spray a little starting fluid into the air intake while trying to start the car. If the car starts momentarily, then there's a good chance the fuel pump is not working or the car is out of gas. You can also listen for the fuel pump's humming sound when the key is first turned on. Also if a inoperative fuel pump is suspected, a good technician will always check to verify there is power and ground being supplied to the pump, to eliminate the possibility of a bad relay or electrical issue. Fuel pressure can be checked with a pressure gage and if there is pressure, pulse can be checked at the fuel injectors in several ways including the most common, with the use of noid lights. If the injectors don't have pulse the engine won't start. ---------- This troubleshooting tips will help you to solve the problem.Thanks.Helpmech.

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As per the problem it indicates that its a fuel problem.Get the fuel pressure checked.If its low then this problem is related to faulty fuel pump and also the clogged fuel filter.Also there are other possibilities,that has to be checked.

A car that cranks over but doesn't start, in many cases will be due to a bad fuel pump, a broken timing belt, an inoperative cam sensor or crank sensor. Also this problems are related to faulty spark plug. Check the spark at spark plugs when you start the car. Do you notice any spark. Actually you should see. If in case there is no spark then it's a spark plug problem. Also the coil pack gives power to spark plug. So check the voltage at coil pack. It will show 12 volt.If there is no voltage noticed at coil pack then its faulty coil pack that has to be replaced.If all the possible options checked out ok then check the car starter. The starter gets power from battery to start the care. If the starter is faulty then it will not let the car to start. Also check and confirm that there is fuel in the car. If it very low fuel then in some cases this causes the problem. Also check and confirm that fuel pump is functioning properly and the fuel filter is not clogged. One of the easiest ways to check for a fuel pump related problem is to spray a little starting fluid into the air intake while trying to start the car. If the car starts momentarily, then there's a good chance the fuel pump is not working or the car is out of gas. You can also listen for the fuel pump's humming sound when the key is first turned on. Also if a inoperative fuel pump is suspected, a good technician will always check to verify there is power and ground being supplied to the pump, to eliminate the possibility of a bad relay or electrical issue. Fuel pressure can be checked with a pressure gage and if there is pressure, pulse can be checked at the fuel injectors in several ways including the most common, with the use of noid lights. If the injectors don't have pulse the engine won't start. ---------- This troubleshooting tips will help you to solve the problem.Thanks.Helpmech.

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1 Answer

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Most probably its a low fuel pressure related problem.Get the fuel pressure checked.If its low then this is faulty fuel pump and clogged fuel filter issue.the other possibilities are,-----

A car that cranks over but doesn't start, in many cases will be due to a bad fuel pump, a broken timing belt, an inoperative cam sensor or crank sensor. Also this problems are related to faulty spark plug. Check the spark at spark plugs when you start the car. Do you notice any spark. Actually you should see. If in case there is no spark then it's a spark plug problem. Also the coil pack gives power to spark plug. So check the voltage at coil pack. It will show 12 volt.If there is no voltage noticed at coil pack then its faulty coil pack that has to be replaced.If all the possible options checked out ok then check the car starter. The starter gets power from battery to start the care. If the starter is faulty then it will not let the car to start. Also check and confirm that there is fuel in the car. If it very low fuel then in some cases this causes the problem. Also check and confirm that fuel pump is functioning properly and the fuel filter is not clogged. One of the easiest ways to check for a fuel pump related problem is to spray a little starting fluid into the air intake while trying to start the car. If the car starts momentarily, then there's a good chance the fuel pump is not working or the car is out of gas. You can also listen for the fuel pump's humming sound when the key is first turned on. Also if a inoperative fuel pump is suspected, a good technician will always check to verify there is power and ground being supplied to the pump, to eliminate the possibility of a bad relay or electrical issue. Fuel pressure can be checked with a pressure gage and if there is pressure, pulse can be checked at the fuel injectors in several ways including the most common, with the use of noid lights. If the injectors don't have pulse the engine won't start. ---------- This troubleshooting tips will help you to solve the problem.Thanks.Helpmech.

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Engine cranks but wont start


Usually if no rpm signal, the vehicle won't start. Engine cranking, did you check for spark at the spark plugs? The fuel pressure you listed may have been the initial prime. It sounds like no injector pulse. The rpm signal comes from crank sensor. If your missing rpm signal, may thought is the crank sensor.
Were there any applicable trouble codes?

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