Car running Lean?
Thread Starter
Registered User
Joined: Apr 2001
Posts: 713
From: Glenview,Illinois,USA
Car running Lean?
So all of sudden one day the airfuel just sits at lean and I am getting a blinking ses so I have a misfire but all plugs and wires are fine. So I pulled the plugs to make sure it really was running lean and not just a bad O2 reading or something. And sure enough all plugs were white so its running lean. all injectors ohm out fine. Why else could this be happening?
Administrator
Joined: Nov 1998
Posts: 71,094
From: Hell was full so they sent me to NJ
Low fuel pressure. Faulty signal from MAF. Huge vacuum leak.
Check the fuel pressure. Then get is scanned and look at the long term fuel corrections and MAF gps values under different driving conditions. Also look at MAP at idle.
Check the fuel pressure. Then get is scanned and look at the long term fuel corrections and MAF gps values under different driving conditions. Also look at MAP at idle.
Thread Starter
Registered User
Joined: Apr 2001
Posts: 713
From: Glenview,Illinois,USA
Oh yeah and my lts on that side hit peak 25% then would gradually hit bottom then back to peak again and same with st trims would hit 50 percent then down then back up again. So the 02 is definately bad
Thread
Thread Starter
Forum
Replies
Last Post
ro2207
LT1 Based Engine Tech
14
Dec 4, 2014 06:18 PM
