You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!
KOEO Codes, car sputters, CEL flashes and causes rough driving. Help please!
Hello everyone. My car is currently embarrassing to drive. It sputters, and drives/decelerates extremely jerky.
I ran a KOEO with the actual machine decoder i borrowed from a friend, here are the random codes i got.
96 - Fuel Pump CKT
91 - Left EGO Lean
63 - TPS Low
41 - EGO Switch
31 - EVP/EPT Circuit
A few comments - This is the first time i have had a fuel issue. Both my O2's are brand new, in a BBK O/R H pipe. I have no idea what/where the EGO switch is. I have fixed my TPS before and i had it set up properly before the car started to run like crap. The Left bank being lean is a normal occurrence and i have yet to fix it. ( usually the right bank is reported lean too. ) Im pretty sure the EVP/EPT Circuit is the vacuum line 'containers' behind the passenger strut tower, but i have no clue whats wrong witt the circuit. There's no visible damage back there ( if im even looking at the right things )
Its a 1990 5.0L with a stock engine. Headers, BBK o/r H pipe, and a few suspension upgrades. Smog pump is still hooked up along with all the vacuum lines. The H pipe did have a hole for the smog pipe.
Any input is greatly appreciated!
This ad is not displayed to registered or logged-in members. Register your free account today and become a member on Mustang Forums!
__________________ Materials Engineering Graduate from McMaster University -
This forum is owned and operated by Internet Brands, Inc., a Delaware
corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford
Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor