Greetings,

99 LS, 87K

Started the LS yesterday and the engine felt like it was shaking as if running on 4 cylinders; it went away after a few seconds. Today same thing, so I turned it off and restarted it - resulting in just cranking for several seconds, no start. Tried again and it finally started, but piles of smoke out the back (just like a seafoam start). It cleared up after a few seconds and was running fine after that.

Is this a bad coil pack? Distributor? Definitely felt like a whole bank of cylinders. No engine light.

Many thanks for any advice

 

no coil pack in the '98+ cars, had COP ignition.

sounds like cam/crank sensor issue. any CEL?? I would surprised if there wasnt at least a pending code.

did you ever have the timing belt work done?

 

Yeah, no coil pack or distributor or high voltage wires in a 99 LS.
So, what color is this smoke? White, black or grey?

 

No engine codes at the moment, I just checked.

Smoke was light gray.

 

there is a coil pack on a '99 LS!......... 8 of them, to be exact!