obd trouble with misfire

[McLin]

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]

Aside from the readou,t what does the car run like, any symptoms?

[McLin]

No the Lumina runs fine, I feel the engine runs not round but the idle speed is constant by 735...

[McLin]

Can anybody pls inspect the freeze datas, and tell me if all right. Thx.

[maxwedge]

No misfire counts or history, no issues there. Try cleaning the throttle body and idle air control.

[McLin]

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]

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]

Here is the Freeze Fram Data after drive a while...

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

[maxwedge]

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.