Tune or mechanical problem ???
Thread Starter
Joined: May 2004
Posts: 6,492
Likes: 6
From: Back in the Burg
Tune or mechanical problem ??? Some back round info... My car has been tuned mostly for WOT, havent had the time to get to the part throttle and idle very much. The car has been idleing around 800-850 rpms, no problems. This weekend I took it out and after 2 hours of driving I came to a stop light, pushed the clutch in and the car died. So I get her home and it dies a few more times on the way. Now the car will barely idle, the rpms will hang around 500 and my air/fuel wide band pegs at 17-1 A/F (LEAN) then the rpms will slowly rise to 8-9 hundred rpms and the A/F goes to 14-1. I havent had time to get it on my lift and start checking things, saturday is the first I will have time. So any one have any ideas on what to start checking first. I have HP tuner but I'm NO tuning expert ( I pay some one to do that). Also my O2 sensors are the original (34K on the clock) So I was thinking that could be my problem. One more thing to add, I am on a SD tune, no more MAF. No SES light either. Coments please, Thanks in advance 
Thread Starter
Joined: May 2004
Posts: 6,492
Likes: 6
From: Back in the Burg
Fuel filter was replace less than 3,000 miles ago, did it when I put the dual fuel pumps in. Also on the fuel subject, My fuel pressure gauge is a consant 60psi the gauge doesn't drop when the lean condition occurs.
The wideband going lean may just be because it is dying - lean may not be a problem at all. First thing I would do is put it in open loop and see if it still does it... that will rule out an O2 sensor problem. Other than that, it may just need idle work. If you post the tune and a log of it running up, someone with HPTuners may be able to help you out...
Thread Starter
Joined: May 2004
Posts: 6,492
Likes: 6
From: Back in the Burg
The wideband going lean may just be because it is dying - lean may not be a problem at all. First thing I would do is put it in open loop and see if it still does it... that will rule out an O2 sensor problem. Other than that, it may just need idle work. If you post the tune and a log of it running up, someone with HPTuners may be able to help you out...
Thread Starter
Joined: May 2004
Posts: 6,492
Likes: 6
From: Back in the Burg
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Verdad Gallardo Thread Starter
Joined: May 2004
Posts: 6,492
Likes: 6
From: Back in the Burg
Not sure what my fuel trims are. I have to reload HP tuner on my lap top because I upgraded my old cable to the new usb and 2.2 program. I'll try to get the tune and a log down loaded tonight if I can get out of work before dark (gearing up for the 4th
) Thanks man. Thread Starter
Joined: May 2004
Posts: 6,492
Likes: 6
From: Back in the Burg
Ok so I finaly got my new hp tuner working. Could some one explain how I post up my tune and a log of it running like ****? Also no dtc's came up on the scan. Thanks again guys.
