Engine Performance Help!!!!!!!!!!!! - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
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post #1 of 9 (permalink) Old 10-23-2010, 07:42 PM Thread Starter
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Engine Performance Help!!!!!!!!!!!!

Hi, I'm new, And have had my cobalt LS for about a year now, my car 2 days ago started jerking and surging and then ENG PER REDUCED showed on the DIC, and then my CEL came on. I took my car to autozone to get the codes read, it was P0101, P0068, P0842, and P0717. P0068 is throttle body airflow performance, and P0101 is mass air flow or volume problem. both my MAP & MAF sensors were replaced about 6 months ago along with my fuel cap, Im trying to figure this out as I need my car running again as its my only car. any one else ever have this problem?
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post #2 of 9 (permalink) Old 10-23-2010, 08:33 PM
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Quote:
Originally Posted by BizKit View Post
Hi, I'm new, And have had my cobalt LS for about a year now, my car 2 days ago started jerking and surging and then ENG PER REDUCED showed on the DIC, and then my CEL came on. I took my car to autozone to get the codes read, it was P0101, P0068, P0842, and P0717. P0068 is throttle body airflow performance, and P0101 is mass air flow or volume problem. both my MAP & MAF sensors were replaced about 6 months ago along with my fuel cap, Im trying to figure this out as I need my car running again as its my only car. any one else ever have this problem?
is it intermittent or is it constant?
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post #3 of 9 (permalink) Old 10-24-2010, 07:30 AM Thread Starter
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the surging? pretty regular, but this morning it will start run pretty normal for about 3 seconds, and then rpms drop to about 300 to were it is just barely staying running, and when i press on the gas nothing happens

Last edited by BizKit; 10-24-2010 at 07:34 AM.
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post #4 of 9 (permalink) Old 10-24-2010, 09:20 AM
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sounds like the sensors are connected poorly. i don't have such an extreme case, but my MAF has poor connection at the moment and it intermittently has acceleration (and boost) issues. if the sensors you replaced have bad connections, then that would probably shut down your car for the most part like you describe after you start it. I think all our cars do a self check, which would explain why you get a few seconds of normality, then the tests fail and your car goes into this dead mode you are talking about. that's my take on it. couldn't hurt to check the fuses for the fuel pump and anything else you may think it's related to.
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post #5 of 9 (permalink) Old 10-24-2010, 09:41 AM
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how many miles on it? is the throttle body really dirty?

07' LS 5 spd, bullseye S256 @ 17 psi wut?!, E85!!!, wiseco 8.9:1 pistons, eagle rods, spec stage 3 clutch, TTR motor and tranny mounts, ARK sts, Magnaflow catback, tinted windows, B&G coilovers w/ adjustable camber plates, front bowtie painted black, and ETX ME-2 rims wrapped in 235/40/18 Nitto invos.
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post #6 of 9 (permalink) Old 10-24-2010, 10:37 AM Thread Starter
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118000, yeah my tb was pretty dirty, i cleaned it up today but now my batt is dead so i need to charge it
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post #7 of 9 (permalink) Old 10-24-2010, 11:29 AM
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hope u get it working good again, and thanks for reminding to get mine cleaned...need to clean it before the snow flies so I can burn up the snow with my tires


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post #8 of 9 (permalink) Old 10-24-2010, 09:08 PM Thread Starter
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Lol, I got it running again, I had a faulty intake manifold gasket and replaced the fuel filter just in case, seem to be working fine now, CEL is still on though....
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post #9 of 9 (permalink) Old 10-24-2010, 09:13 PM
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you could probably just clear the code at an autozone



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