Having problems with your 1990 Pontiac Grand Prix ?

How do I diagnose a fuel computer problem - 1990 Pontiac Grand Prix

Posted / edited by AnonymousUser on : 22-01-2018

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How do I diagnose a fuel computer problem - 1990 Pontiac Grand Prix


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Fuel problems 1999 Grand Prix GTP 3800 Supercharged VIN 1: car starts, but shuts down within 10 seconds. You can see the fuel pressure drop within those 10 seconds. If I flutter the throttle, the fuel pressure will jump back up to 50lbs & back down to 0-10. But, you can keep the car running by doing that. I have replaced the fuel filter & helped a little bit, but still shuts down. Replaced fuel pressure regulator & fuel pump & oil pressure switch & still nothing. HELP....


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I have 02 pontiac grand am and it wont start, it cranks over and getting spark and getting fuel, I replaced crank sensor, however i pulled spark plugs and didnt smell gas in the cylinders when someone else was cranking it with the key. not sure if fuel rail is bad or if the computer isnt letting the fuel into cylinders. the fuel rail is getting fuel cause i checked the release pressure valve like on a tire which is located on front side of motor. what is my problem?


Attempt to start the car by turning the key to the Start/Run Position. Observe that the vehicle fails to start and that the security light is illuminated. leave the key in the 'ON/Accessory' Position. (DO NOT turn key to the 'off' position.) ... 2002 Pontiac Grand Am

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Checkers dealer parts store\015\012drain and drop the tank no problems at all just remember any seals lube lightly with vegetable oil no clogs\015\012\015\012you might need a lift ... 1997 Pontiac Grand Prix

I have a 00 pontiac grand prix with a 3.1 engine. engine cranks, has fire, has 60 lbs fuel pressure and still wont start. i have changed fuel pump, crankshaft sensor, fuel pump breaker, fuses are good. what the heck is my problem thanks and good luck!!!!


Is the security light in the dash flashing? what engine control fault codes do u have? U can call me at my house in USA if you need more help until 5 pm 925-577-7157 ... Pontiac Grand Prix

Hi i have a 93 pontiac grand prix that i ahve replace everthing on and still nothing above idle (tps, egr, intake gaskets, tb, cataltic converter, computer, did full tune up , fuel pump, fuel filter , and some relays..... cant to save my life seam to get anything to work i have also tested the fuel pressure and holds at 40psi


Remove the ignition module,and have it tested,there is a est mode in the module that may have went out,est is electronic spark control.If it checks good,then the computer would be the problem,I hope this was helpful,and if so,please rate,and see if t ... Pontiac Grand Prix

We have a 2000 Pontiac Grand Am Se. The car started to idle rough for 1st 15 secs then was fine. It is now getting progressively worse. Idles rough and chugs until engine reaches approximately 176 degrees, then it is fine. Mechanic checked the following: fuel filter fuel pump injectors fuel pressure map sensor plugs coil assembly Computer diagnostics does not show a problem other than it is running lean. No codes telling why.


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. ... 2000 Pontiac Grand Am GT

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HAve the battery AND alternator fully tested. I suspect it to be a power supply problem and one of the two items if not both are in need of repair/replacement. ... 2004 Pontiac Grand Prix

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The positive battery cable is prone to corrosion at the battery end. Many times, the connector will completely decay loose at the cable end. Replace the cable if that is the case--don't use a clamp-on replacement terminal as they are prone to failure ... 1997 Pontiac Grand Prix

Is there anyone who can help please. My brother was driving my mothers 1999 pontiac grand prix when he ran out of gas. He put fuel in it and it starts but quits immediatly. he changed the fuel pump but continues to do the same thing. What could be the problem. Thanks


The antitheft system. Read this link.http://vatspasslockpasskeysecurityhelp.yolasite.com/ ... Pontiac Grand Prix

My 2004 Pontiac Grand Prix DIC says to Check Fuel Cap. I have replaced the Fuel Cap and still have the trouble code. Is this a problem with the Leak Detection Pump or should I be searching elsewhere?


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Hi i have a 93 pontiac grand prix that i ahve replace everthing on and still nothing above idle (tps, egr, intake gaskets, tb, cataltic converter, computer, did full tune up , fuel pump, fuel filter , and some relays..... cant to save my life seam to get anything to work


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When i drive the car there is no power and won't get up to any speed what soever. When you hit the gas it just goes blaahhhh. The make and model is the pontiac grand prix le with the quad four engine. I have change the plugs, coils, plug boots, ingnition control module, over head coil housing, fuel pump, fuel filter, and checked all the lines. It is firing on all cylinders. tranny fluid is perfect color and no burning smell. The exhaust is blue and smells like gas. What is the problem.


Tell me something how does it rev when you are in park sitting and throttle up then ,,hows the responce to the throttle and does it start straight away\015\0122/ what type of fuel are you using \015\0123/Air filter when was it last re ... 1991 Pontiac Grand Prix

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I need a error code solution for a 2000 pontiac grand prix gtp daytona 500 pace car replica. I have the check engine light on and i asked advanced auto to give me the code, it said something like coolant tempture reading too low, so they recomended to replace the probe under the coolant line on the right front side of motor, but this didnt fix the problem, and ive reset the computer to see if would stay off and it did not!!! help please


DTC P1117 Engine Coolant Temp. Signal INTERMITTANT.\015\012\015\012Usually it means LOW - but for GM that code means intermittant.\015\012\015\012You already replaced the probe with no change - now it is time to check the actu ... 2000 Pontiac Grand Prix

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Sounds like a crank sensor, my cousin had the same problem ... 2004 Pontiac Grand Prix

My '96 Pontiac Grand Prix is having trouble starting. It will start, but it will not stay running. It seemed like the battery was drained, so we swapped it with a new. My dad had changed the fuel filter and at that point it sounded like it wanted to run, but he had to give it gas to keep it alive. As soon as he laid off the gas it would slowly die. Can anyone help me out with this problem?


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I have a 2005 sedan pontiac grand prix, recently all the gages started to going crazy without reason, the screen shows me low fuel, the ac does not cool very well, the remote do not open the doors, the rpm's shows cero, the mileage gage shows cero also, and suddenly everything comes back to normal again....do I need to replace a computer module in my car??


We cannot confirm the ECU is faulty all of a sudden.First scan the ECU for any codes. If there is any codes it will let you know..Most autozone does the scanning for free. ... 2005 Pontiac Grand Prix

I have recently purchased an 89 pontiac grand prix with a 2.8l. The problem I am havingis sometimes it will run and sometimes it won't. I am getting fuel to the injector rail and I have spark it seems the injectors won't fire sometimes. I just replaced the engine control module to no avail. Would you have any more suggestions?


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I have a 97 pontiac grand prix with a 3800 v6 non cupercharged engine. Service engine light came on so i changed spark plugs and wires with oem parts. Now it is hesitating and running rough with service engine light soon stays on. Used diferent fuel and put in some lucas brand cleaner to clean out the injectors, but hasnt helped. What could the problem be and how can i fix it?


You need to read the codes. Get an OBD2 code scanner from your local auto parts store,, then read the code stored. Then you will have a better idea what is going on. ... 1999 Pontiac Grand Prix

I have a 1995 pontiac grand prix that will not start.It's getting spark,I think it must be a fuel problem


REPLACE FUEL PUMP AS LONG AS FUEL FILTER IS NOT CLOGGED IT ALSO COULD BE MAP SENSOR ... 1995 Pontiac Grand Prix

96 pontiac grand prix se 3.1 service engine light is on and flashing. car runs bad. sometimes it has no power to get up an go. goes through alot of gas and smells of fuel bad. had it put on computer all kinds of codes came up. mass airflow, egr valve, ignition coil, coil module, cylander #3, multiple missfire. bought the ignition coil didn't need it. check coil modules all are working fine. any help?


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