Engine Problems
09-10-2006, 02:04 PM
#1
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Engine Problems
i just had a question and wondered if anyone could answer it or has had this problem, ive been having real bad idle problems with my car. like when i put the car in neutral after going through the gears the tach will start bouncing really bad, so bad that i shifted from 3rd and put the car in neutral that my car actually stalled while coasting, also my car went into power reduce mode yesterday and it scared the **** outta me, I dont know my car has just been acting really weird lately. Can someone please help me out, thanks.
09-10-2006, 02:21 PM
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CobaltSS13 go get your HP Tune... sounds like the bad idle under AC load issue that is expirenced and they did come up with a reflash to help it. When you get the tune have your idle set to 900 rpm. That seemed to be the fix for kellyperformance before the reflash was published.
09-10-2006, 02:27 PM
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Mine did it for the first time this morning. Pulling out of the gas station I thought my car was gonna die. It cant be the gas i only use chevron. The idle surged like 4 times then it was fine.
09-10-2006, 02:29 PM
#7
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Originally Posted by Allshot
Mine did it for the first time this morning. Pulling out of the gas station I thought my car was gonna die. It cant be the gas i only use chevron. The idle surged like 4 times then it was fine.
09-10-2006, 02:33 PM
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Originally Posted by CobaltSS313
yah i get that when i put the car in nuetral and coasting, its just starts bouncing, all the way from 500-5000rpms.
09-10-2006, 02:33 PM
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Mine bounces like that too sometimes. I just give the throttle a quick tap and it fixes it. I'm just so use to it now. Also, when I go into reverse I always stall.
09-10-2006, 02:34 PM
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Originally Posted by WSFrazier
Mine bounces like that too sometimes. I just give the throttle a quick tap and it fixes it. I'm just so use to it now. Also, when I go into reverse I always stall.
09-10-2006, 03:33 PM
#13
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no i havent checked for vacuum leaks. i just got back from a quick drive around the block and the car runs fine no limp mode or nothing, also shifting is fine. It just bounces everytime i put it in neutral, also when i leave it in gear it bucks as the car decelerates, is that normal?
09-10-2006, 04:03 PM
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I also get the bucking. I think it has to do with being dan.Spec. I still love the tune though. His SD tune doesn't do any of that, perfectly smooth. But sometimes the shifts can be rough. I think he said after he gets his Redline back he's going to work on it so that we can all use it but who knows when he'll get his car back.
09-10-2006, 04:24 PM
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go to the dealer and tell them to reflash your car because of stumbling idle. Theres a TSB out for it not sure what the number is. Even if they cant recreate the problem tell them reflash it thats what i did and problem fixed
09-10-2006, 04:32 PM
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what the hell it sounds like you all just got this problem at the same time lol. I don't know if this could be it, but my car does it when the engine is cold a little. It automatically keeps the revs a little higher than usual to warm up the block, so when i stop at a light before its warmed up a little the tach will jump from around 800 (normal idle) to around 1300 and sit there for a little. It's in my manual, so i guess its completely normal of course i have a totally different car and yours sounds alot more severe. I'd take it in.
09-10-2006, 05:59 PM
#22
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u should check ur cat bro my ss went into engine power reduced mode, when i took it to the dealership they had to replace the cat, the first time it stalled on me was when i was racing an evo MR my car just shut off on the highway at 125 mph the idle was also very bad.
09-10-2006, 06:08 PM
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no no. i have HPtuners and a 900 idle RPM. and mine some times dips down to about 500 and flys back up. its really bad on my also and sometimes cuts off. i guess we will just wait on a recall. but i have 60lb injectors but this happened before i got them also. i think all cobalts have this problem
