Efi again.......

[thefastestz]

i can't get my78 280z to stop fouling the plugs.

The injectors weren't getting pulse and i replaced the

ECU. (thought that would solve probs)It had electrical woes not engine related(i think)

but i am out of ideas. What are the common causes of carbon

fouling on the plugs. It seems to be running rich but what do i

know. Could it be the ignition module? Is that common? I just need a place to start over with.

[JEFF]

Carbon fouling possibilities that come to my mind.......

* Weak spark

* Oil blow by due to worn rings / low compression

* PCV not operational ( stuck open )

* Too low of fuel octain rating

* Timing to far retarted ( incomplete burn )

* Wrong heat range of spark plug

* Too cold of thermostat

* Worn out / hardened / cracked valve guide seals

- Those are the items that come to my mind as the possible

sources of carbon fouling on plugs.

I welcome others to add to and/or correct the above.

- Jeff

[thefastestz]

Thank you for that list....tommorow i will go through it.

:classic:

[280zx Fever]

Air mixture could be wrong..

[Mr Camouflage]

Ditto. Air flow meter could be out.