Rough idle and stumbles on acceleration

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Jul 28, 2013 | 02:59 PM

SS4life

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From: Tx.

Rough idle and stumbles on acceleration

Okay when I start my car it seems fine at first then turns into a rough idle. When I drive off it feels like the car has no power and kinda stumbles. Once I get to about 2000rpm it just takes off. this started about 2 months ago and I changed the knock sensors which were throwing a code and put in a new PCM from frost. It started acting up again last night and the SES light started flashing at me. Oreilly's said they can't pull a code if the light isn't on buy they think its the crankshaft position sensor. Any ideas if this is what it is?

Jul 28, 2013 | 03:13 PM

ss4life1986

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From: Arkansas

Don't know how but I logged into someone else's account using my Facebook. The post is supposed to be mine. The above problem is for a 2002 camaro ss

Jul 29, 2013 | 08:52 AM

wssix99

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Classic dirty MAF. If you search for that, you'll find lots of info.

Jul 29, 2013 | 09:49 PM

JDEP162

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just cleaned my maf, smoothed idle noticably

Jul 31, 2013 | 02:09 PM

Evandini

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As stated above MAF could need to be cleaned. Also could be ect related. My camaro did the same thing and the cause was the pins in the ect not making great contact with each other.

Jul 31, 2013 | 06:04 PM

ss4life1986

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From: Arkansas

Gonna try to clean it right now. Side note it seems to only misfire right after I drive it for awhile and shut the car off for less than an hour maybe. Last night the ses light was blinking but didn't stay on.

Jul 31, 2013 | 08:30 PM

ss4life1986

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From: Arkansas

Cleaned the maf sensor and it drove fine, shut the car off for about 30 minutes and had the same problem. A little history, I changed the knock sensors and harness about 2 months ago but today I had the codes read today and the dealer said knock sensor 1 low frequency p0327 and p0300 misfires cylinder 1 and 5. I do have a corvette o2 sensor on that side for the longer tail for my LTs but I was told it wouldn't make a difference. Anyway I bought a camshaft position sensor and a new map sensor to replace with the knock sensor because I'm not taking it apart for the 4th time. We'll see if this fixes it tomorrow.