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Old 12-11-2022, 07:56 PM
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twobjshelbys twobjshelbys is offline
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Join Date: Jan 2009
Location: Las Vegas, NV
Cobra Make, Engine: Shelby CSX4005LA, Roush 427IR
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Quote:
Originally Posted by jhv48 View Post
Those plugs appear to be covered with fluffy carbon deposits and if so, that’s a rich condition. I wouldn’t run the car too much until you figure out why the injection system is dumping too much fuel into the cylinders.
It’s a good thing the car won’t start now. You don’t want to drive it much running rich, as the excess fuel can wash down the cylinders and cause real problems.
I concur. Mine looked like this.

However, I also had another symptom: My rich portion of the DFI tables were beyond 1/2 to 3/4 throttle. Running steady at that speed/rpm/position and then letting off the throttle would result in backfires... I could also get it to backfire by "foot on the pedal" acceleration/shifting like you'd get when merging into highway traffic and then letting off the throttle...

Do you have a backfiring problem?
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CSX4005LA

Last edited by twobjshelbys; 12-11-2022 at 07:58 PM..
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