cobalt starting weird

Soon2BeLegend · Dec 9, 2011

I bought a 2006 Chevy Cobalt a month ago and i have a question about it. My car starts kinda rough at times where it cranks and cranks and finally it will start. Or itll keep cranking and when i release the key, it will have a coughing start. other times it will start perfectly fine. it starts differently every time. what could be the cause of this?

LotusRenaultF1 · Dec 13, 2011

I have a similar feat.

The engine will run rough and if I try to move forwards or backwards the engine will cough and nearly stall. (Sometimes it will if I let too far off the clutch even if I hit the gas pedal). After a few seconds I hear a strange noise come from the engine which I believe is something to do with the valve timing. I know other people with this so it may just be the engine warming up from cold starts.

BankDude · Dec 13, 2011

are you running a check engine light at all? i have the same issue, but it's just a tps... which on our cars, you'll need to buy a whole new throttle body. they're not expensive or hard to put in at all though

Soon2BeLegend · Dec 16, 2011

The check engine light was on for a knock sensor, but i have had it repaired. hasnt come on since. still has started up weird though. but runs fine once it has started up.

yellow_V · Jan 4, 2012

bump for same problem

psmith · Jan 5, 2012

Sounds very similar to a problem I had. Is you fuel mileage affected at all? If so, Replace MAF sensor.

yellow_V · Jan 6, 2012

Eh not noticeable I'm going to attack the cam sensor see we're that takes me

yellow_V · Jan 7, 2012

Also it is new noticeable at half around 1/4 tank

LotusRenaultF1 · Feb 27, 2012

I found out what my problem was; it's the fans. I noticed that during this scenario the headlights flicker. This is because the electrical system is drawing a lot of power to spin the cooling fans.

BankDude · Feb 27, 2012

is your temp sensor out? because same thing happened with my car last week because my car didn't know how hot it was so it was in a fail safe mode...

cobalt starting weird

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