hardiek

140,000 Was running fine, then out of the blue started running rough and sputtering at low rpm, smoking, and not accelerating properly. No CEL. Starts fine and runs. Has new plugs.

The ideas I have seen so far are bad coils or bad icm. Anything else to check?

Is there any way to know if a coil is bad other than replacing?

thanks to all for any tips.

Kevin

SloopJohnB@mac.com

9/10 time it is a vacuum leak. Find it.

Or get codes. Don't just throw parts at it.

goodracer

He's right! Check your hoses! I had the same problem. It was the throttle body boot (TBB). It had a rip in it and had to change it. That's a good place too look too. It gave me lots of problems even threw various misfire codes.

Good luck

hardiek

strange thing is there were no codes at all. I am doing the cam seals and valve cover seals and then putting it all back together. hopefully it will be happy or at least generate some codes.

hardiek

it had the classic oil seal leak already so i went and did that. any hoses in particular to check?