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lambse goes to 10.98 after CL kicks in??

Unread postPosted: Sat Apr 14, 2018 12:12 pm
by Fender2k5
Im working on a 2004 mach 1 that starts and runs great in open loop but as soon a CL kicks it jus richens up til lambse is 10.98... somes times i can rev it up and get it to start correcting back to 14.7, and sometimes jus the passenger side goes to 10.98. It runs great and Afr is good wgeb i force open loop. The car has long tube headers, ive replaced the passenger side o2 and nothing changed, checked the extension harness and wires to the ecu. Everythings good.

Re: lambse goes to 10.98 after CL kicks in??

Unread postPosted: Sun Apr 15, 2018 7:04 pm
by decipha
then most likely the o2s ate getting too cold at idle causing it to dump fuel, not uncommon

just force open loop below 1500 rpm in fn311 the tprel OL threshold function

Re: lambse goes to 10.98 after CL kicks in??

Unread postPosted: Mon Apr 16, 2018 3:37 am
by Fender2k5
Thanks, i appreciate it!