Thread: Rich in cylinders 1&2
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Old 12-27-2016, 11:50 AM
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Join Date: Feb 2012
Location: Keller, TX
Cobra Make, Engine: Lonestar Classics LS427. Self-built 408W, AFR 195 heads, Performer RPM Intake, Quick Fuel 750, 407rwhp, 479rwtq
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I believe so, I never took the heads off with the efi, but had problems with it too. When I took these heads off today, I found 1&2 appear really rich while 3-8 look ok. My WBO2 that I have been using to help tune is on this side.

My problem with the EFI was that it kept fouling O2 sensors. The tail pipes are black. It won't idle at anything leaner than 13:1 measured on the sensor. I'm wondering if whatever is causing this is my problem.
Last edited by Texasdoc; 12-27-2016 at 12:26 PM..
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