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Coupes & Convertibles Pontiac Sunfire Pontiac Sunfire Starting and Stalling Problems
231 messages, Last post on Nov 23, 2009 at 10:36 AM
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I have a 96 pontiac sunfire, 2.2 L engine with 110,000 miles. It will start up perfectly fine from a cold state, but doesn't like to start when the engine is warm. When I try to start the engine while warm, it will turn over normally but it won't fire. When the car does eventually fire, the engine will catch, shudder and chug as if it is not getting enough gas. Then the car will jerk and stall out. If I press the gas pedal when the engine fires, I can push through the chugging, stuttering stage and the engine will stay running but the idle will be very rough. If I let the car sit for couple hours after it was warmed up, (so the engine is cool again) it will start up normally. I have had new plugs and wires installed. Fuel pump tested o.k. Fuel Filter replaced. Crank shaft sensor replaced. I had the entire fuel system and spark plugs thouroughly cleaned. I have invested over $1000 in the car and it still has this problem. Does anyone know what is going on? I would really appreciate any input as I am really not in a situation where I can afford to buy a new car. Thanks so much! -Kelly
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Replying to: seamusz (Dec 01, 2008 8:38 pm) |
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I have two problems that I need help with, one is do they make an AC bypass pulley for the 2.4 engine, my AC clutch is grinding, but I don't use my AC and think it would be easier to install a bypass than to replace the clutch. My second problem is intermittent, when I am driving a highway speeds, in any conditions, with or without cruise control, the engine rpms will drop to around 1500rpm. It is for less than a second, then it returns to normal. It happens about once a month, and fuel tank level does not affect it. Any ideas what would cause this? I have replaced the fuel filter, and plugs. 
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Replying to: bauekel (Feb 04, 2009 7:31 pm) About $50 at any auto parts store. Located on the fuel rail right on top of the engine. Consult your Chilton's; easy fix. |
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Replying to: gzalesky (Feb 18, 2009 6:47 pm) Cheaper but probably not easier. Pulling an a/c compressor and it's related components is never easy. I guess that's a matter of opinion though. Also consider that other than a bypass pulley not being made for the 2.4L, it would only be about $40-50 cheaper than a clutch. "...the engine rpms will drop to around 1500rpm." Does the vehicle physically slow with the RPM drop or does the automatic trans upshift causing the drop? What RPM are you running before the drop? Is the trans sticking in third while occasionally wandering into overdrive? Just a guess without driving it; I'd say 3-4 shift servo. Sounds like it needs to go to a trans shop. I'm more familiar with the 4L60E in GM light trucks than these little guys, but if GM does anything consistently that overdrive servo has gone bad. |
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Hi I need some help. My son has a 2001 Pontiac Sunfire. The car worked great up until about a month ago. He started having problems where the car would start to lose power and stall when he was going slow or at a stop light. I am in Canada and we thought that maby his gas was freezing up so we put some methalhydrate in his gas tank. It helped for about a week then it started doing the same thing again. We decided to change that battery as the car got so when it did not start he would require a boost. That helped for about another week. Now even with the new battery and a boost we can not get his car running at all. The odd time with a boost my husband can get it started but it will not keep going then it just will not start again with a boost. He borrowed a error code reading machine from a friend but the car is not putting out any codes. He has tested the battery conections. Does anyone have a solution for our problem it is getting annoying. My husband is mechanicaly inclined but everything he checks appears fine. Does anyone have any suggestions please. Thanks Debbie
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Replying to: whatdidigetn2 (Feb 01, 2009 10:26 pm) |
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Replying to: debnb (Feb 25, 2009 5:47 am)
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I too live in Canada and yes it is cold. My car has been great since I've owned it up until the beginning of December. It revs high while I'm stopped and gives the car a jerk, then everytime I take my foot off the gas it stalls.Took it in 3 times to get it looked at and the mech. can't find anything wrong with it. PLEASE HELP I feel like I'm driving Christine |
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Replying to: debnb (Mar 02, 2009 11:20 am) WHAT DID YOU DO??????
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