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Check your plugs Posted by Ari [Email]  (#2847) [Profile/Gallery]
(more from Ari) on Fri, 28 Apr 2006 06:12:36
In Reply to: Missfiring, Kevin Thomas, Fri, 28 Apr 2006 00:16:42 Members do not see ads below this line. - Help Keep This Site Online - Signup |
It could be the DI, but you could also be simply fouling plugs. Pull the plugs and look. If they look old or tired, replace them. Make sure the gap is correct. If the problem is limited to one or two cylinders, you may have a sticky injector (or two) - a bottle of Techron or other injector cleaner wouldn't hurt.
If you truly are running on only a few cylinders, it would be the turbo or fuel starvation - that would impact all of the cylinders. And turbo issues don't show up that way - it either delivers more air or it doesn't - then it's up to the ECU to provide fuel.
I'd go after the plugs. But while I had the DI out, I'd flip it over and remove the plastic cover. Look for leaking oil from the coils; hold it up to a bright light and check the oil level in each coil - it should be around 90% full. If one is low, that could be the issue. If the DI board looks burned or smells burned, that's a bad sign.
Look at the top of the spark plugs for arcing. There is a spring in the plug boot on the DI that connects the plug to the metal plate on the coil. Look at the metal plates on the coils - any look like arcing has taken place? A weak spring can cause a bad connection, and you'll get arcing. That's energy not going to the spark.
posted by 192.249....
, Fri, 28 Apr 2006 06:12:36 <-- Viewing This Message
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