on my iroc tpi, after new plugs, wires, msd cap and rotor, and new coil.. after i used seafoam in the gas.. after 25 miles this is the result.. only the left side was fisfiring like crazy.. heres the pics of the left plugs. sorry for the huge pic.

 

*misfiring.

 

It looks like your plugs are seriously carbon fouled. That normally points to improper tuning. You should take a look at the air filter, ignition components, and engine control system.

Well atleast thats what Chilton suggests!

But that more than likely is the problem with the misfiring.

 

What do the right side plugs look like? Could you really have all plugs on just one side misfiring? That would be odd. Excessive fuel could also cause that. If the right side plugs are clean, check the injector fuses.

 

yeah, I know for sure it's running rich, just redid all the ignition for the most part. just trying to get it tuned in. and yeah doc, it's only doing it on one or 2 cylinders on the back driver side plugs. as for the passenger side. they do have little carbon build up but not nearly as bad as the driver side. kinda weird.

 

and my injector fuses are good, first place I checked, and double checked.

 

Verify no runner gasket leaks, then suspect your injectors.

 

no runner leaks.. has pretty much all new sensors other then Maf. dont think that works, but then again it's not throwing a code at me.

 

The fact that the problem is affecting only a few cylinders would indicate that it is not sensor related but rather specific to those cylinders. Air leaks in all the other cylinders would trick the system into adding fuel, making those few cylinders run rich. Otherwise, it can really only be the injectors. A weak spark can leave the plugs dark but we already know that's not the problem.

 

alright cool thanks doc. much appreciated on my days off I'll do some more investigating and we shall go from there.