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Pontiac Sunfire Starting and Stalling Problems



  • blufire04blufire04 Posts: 1
    does anyone know if a aftermarket air ride kit for a 95-99 Chevy Cavalier will bolt directly on to a 03-05 Pontiac Sunfire">
  • tvanriktvanrik Posts: 1
    :shades: "but luckily we found that you have to reset the anti-theft passcode by doing a long series of key turns to program the new password for the new computer"

    We've been having the exact same problem with my daughter's car. Replacing item after item. Thanks so much for sharing your solution, we are going to try it next.
    Can you tell me where to get those key turn codes? I have had no luck trying to find them myself. You can email me at thanks!
  • roofdr911roofdr911 Posts: 2
    the TCC solenoid has been a problem on GM vehicles for years. i had a 94 cavalier with the same problem. you should be able to unhook the wire and see if that fixes it. if it does, that was the problem.
  • roofdr911roofdr911 Posts: 2
    that still sounds like the TCC solenoid. mine would stay in gear and jerk violently when i slowed down and when i tried to start it. once i unhooked the wire to the valve, i never had another problem.
  • try looking at the fuel filter then clean your injectors.It could be some other things but check them first
  • tdmsrtdmsr Posts: 1
    my brother has a pontiac with a starting problem after shutting it off. has to leave the ign. key on for 10-15 min. to reset the comp. anti-theft comp. per his mech. is there a way to disarm this system or how can we fix it the battery runs down because the lights stay on while the ign. switch is in the on position, he has to use a wheel chair and walker to get around I realy need your help. Thanks Terry
  • Have a '98 Sunfire Convertible with about 140,000 miles. This car has run great for the last 100,000 miles, with the only problems being door electric window actuator and switches, and similar problems.

    For the last year or so, the car has occasionally hesitated to accelerated, or tried to die at idle, especially after being started warm. Used to be able to cure this, it seemed, by putting in neutral and revving up the engine a bit.

    Lately, this has suddenly become a daily occurrence, and it now occasionally shows the check engine light. Every thing else seem normal. Took it to a shop and it showed only a "rich" code.

    Okay, experts. Anyone got any ideas?
  • i started my sunfire with the alt plug unpluged, shut the car off tried to start it and all it does is turn over. it has spark and gets gas, im wondering if i set off the anti theft system. is there a way to reset the computer or anti theft system?
  • hi
    id check the egr vavle i think. Mabye its stuck open giving u the rich code.
  • Took it to a new shop in town, with high recommendations. The young mechanic had won a national troubleshooting competition. He had the car back out in the parking lot in less than 10 minutes, having replaced a cracked vacuum hose.

    Turns out his dad had won the Plymouth national troubleshooting competition in 1974 also. Guess trouble shooting runs in the family. :)
  • read on one of your fixes you gave someone key turn how to do could you send me email on how to do this ive tried all kinds of things start some time and not other times thanks forward to peachstateboi please
  • my sons 99 sunfire cranks but does not start. he has changed the fuel filter and pump but when he turns the key on there is no fuel pump running. where should he go from here?
  • it might have jumped time, thats what happend to mine
  • got gas came home, car will turn over but won't start now, no other problems.
  • After reading every one else's problems, I can relate.

    My 98 Sunfire was running perfectly fine. On Christmas Eve, pulled up to a red light on the Boulevard and it stalled. After 15 mins of investigation, hit the ignition switch and it magically started. Went to Advance Auto, they put a computer on it to read my computer and it said that the CrankShaft A Sensor was bad. Bought one just in case for later replacement. Had no problems the rest of the night, finished my Christmas shopping and all was well.

    3 days later began to "sputter, rear and jerk" while I was driving it. Got it to the garage and replaced the CrankShaft A Sensor.. Worked fine didn't seem to have a problem whatsoever.

    Yesterday, it made it 6 miles and just shut off. Started again, made it another 3 miles and that is exactly where it sat. The garage put the computer on it again, and it said that it was the crankshaft sensor. In the meantime, after cranking on it to attempt to get it started the starter went out.

    The starter was put on, the cam sensor replaced drove it home... didn't make it but 4 miles and it shut off again... Same problem! To cover all bases, replaced the Coil pack module this time.

    So with this being said, the Crankshaft Sensor, the Cam Sensor, the Starter, and the Coil Pack Module have been replaced.

    It seems when the temperature begins to go up to normal running temp, it starts this. When it's cold it works fine.

    So, what now? Any suggestions, besides junking it???
  • onelexonelex Posts: 2
    im glad ur car got fixed! im having similar problems,i changed the fuel pump,iac sensor,map sensor and the crank sensor,replaced the all hoses that where cracked or just not looking good! i took the spark plugs out cleaned them,had the ignition module checked it was good! changed the fuel pressure regulator,put the original radio back in the car,the radio is working. i tried to start it up and it feels like it has more strengh but it still wont start!! what is going on i cant keep guessing! and if i could i dont know what else to do! doc can you help? i have a 1996 pontiac sunfire gt...
  • onelexonelex Posts: 2
    look at ur car book if u have one if not look up pontiac and there is a way to unlock the radio and keep it unlocked it just has to deactivated,or u can call pontiac the can connect you to a tech tat will help u!!
  • Did you have any luck with this? Believe it or not...same exact problem and the mechanic replaced the same things except the starter....No idea what to do next...Amazing...
  • Some of y'all might be interested in this, as I posted about it awhile back- this is the instructions direct from the manufacture in relation to the anti-theft reset problem I had- and everyone else has probably run into by now. You can go back and see how long ago we fixed my problem. I'm up to 177,000 miles now and I love my car!!! I wouldn't take anything for it at this point... now only if the driver side window was still working! :)

    --- Here's the instructions ---

    In order for a theft deterrent vehicle to run, a password is communicated between the Instrument Panel Cluster (IPC) and the PCM. If a PCM (ECM) is replaced, the new PCM (ECM) needs to learn the correct password of the vehicle. When the new PCM is installed, the EEPROM calibration is flashed into the new PCM and the vehicle will learn the new password upon initial ignition ON. If the IPC is replaced, the PCM needs to learn the new password from the PC. The password learn procedure is as follows:

    Attempt to start vehicle, then leave the ignition ON. The THEFT SYSTEM telltale will flash for 10 minutes .
    When the THEFT SYSTEM telltale stops flashing, start the vehicle. Once the vehicle is running, the password is learned.

    * Just my observation here, it's really going to be beneficial to have your factory radio installed to do this, as I don't know if you could even tell what's going on without it and its red flashing anti-theft light. By now it's just a couple extra steps to take your aftermarket out, put your factory back in, then once this reprogram is done, you can put your aftermarket back in.
    I will also tell you- I was uneasy installing an aftermarket radio after all the problems we had, but the key is a high quality wiring harness for your Pontiac. My 2000 Sunfire was the first year Pontiac went to this new fangle idea of putting the "brain" of the car inside the factory radio. So, where a lot of folks can go to Wal-Mart and get one for $10 I didn't have that luxury. I can say with all the confidence in the world to go with the Pac-Audio "Radio Replacement" (as they now call it) It's the only one that "Maintains a "healthy" status on the Class II databus" aka tells your PCM (ECU) that all is good. These items are costly ($100ish)- in fact they might cost more than the aftermarket radio itself, but don't make the same mistake I did and get a cheapo version- that's what caused my $1,000+ headache in the first place. And go ahead and google replacing your factory radio with a new factory radio, and be prepared for a real shocker! Currently, I can gladly say I've been using my aftermarket radio with my Pac-Audio piece now for months without any kind of issue what-so-ever. I'm not affiliated with this company, but I really should be. I will say I keep my factory radio in the trunk of my car just in case my aftermarket would ever be stolen, as I don't know if these cars would even run without the radio in there or not!

    Good luck to all- and if anyone has any questions please feel free to ask away! :shades:
  • I'm going tell you, I would seriously consider getting a new ECM (computer) and checking out my post below on the key-turn dance you have to do for the anti-theft reset.

    Salvage yards might be a good starting point- I got my replacement at the Pull-A-Part for $32ish, O Reilly was able to flash it for me for $75, so one more $100 was annoying yes, but it turned out to be what fixed it for me.

    You could also get the whole package at O Reilly, and I think it was less than $200 for the computer (ECM) that was already flashed for my car.

    See just putting the factory radio back in didn't cut it for us, because the damage had already been done to the computer. Looking back, it was pretty obvious that something was going to be squirrely with this by the sheer fact that Best Buy wouldn't sell me any radio install parts, for fear of lawsuit.

    Out of all the things my husband changed, poked, prodded, replacing the ECM was by far the easiest, so you shouldn't have any trouble swapping it out.

    Good luck with it- let me know if it this helps!!!
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