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obd trouble with misfire


McLin
07-31-2009, 02:53 PM
Hi,

I read outmy Lumin and catch freeze Data, and Cylinder 3 and sometimes other have misfire, number 257.
Sometimes Cylinder 6 have 13 or 1. Its variable, after restart the engine cylinder 4 have 257 misfire...

Has anybody an idea?

maxwedge
07-31-2009, 07:13 PM
Aside from the readou,t what does the car run like, any symptoms?

McLin
08-01-2009, 06:38 AM
No the Lumina runs fine, I feel the engine runs not round but the idle speed is constant by 735...

McLin
08-04-2009, 02:51 PM
Can anybody pls inspect the freeze datas, and tell me if all right. Thx.

maxwedge
08-04-2009, 07:01 PM
No misfire counts or history, no issues there. Try cleaning the throttle body and idle air control.

McLin
08-05-2009, 09:15 AM
Thx, what is about the Trans Values? Are they ok?

I did change spark plugs and wires and ignition coils, cos 2 of contacts was rusted. Now I didnt have any misfires...

maxwedge
08-05-2009, 07:29 PM
Solenoid commanded functions look normal, but a solenoid could still be bad, but that would set a code after a certain number of drive cylcles.

McLin
08-07-2009, 02:09 PM
Here is the Freeze Fram Data after drive a while...

What is about 2-3 Shift Error 0,2? What did they mean?

maxwedge
08-07-2009, 03:40 PM
You are over analyzing this complex info, the pcm is looking at shift timing, in tenths of a second, your trans adaptive shift pressures are 0 which means the pcm does not detect internal slippage, this is good.

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