PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Headers installed, car won't go into CL mode....

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Old Aug 22, 2007 | 10:43 PM
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Default Headers installed, car won't go into CL mode....

Any ideas on what might be causing this problem? I just got done installing my XS Stainless headers, and now the car stays in open loop. Both of my 02's are working and LTFT's are adjusting themselves accordingly, but the car just stays in open loop. Any ideas?

Nick
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Old Aug 23, 2007 | 04:20 AM
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Originally Posted by Viperguynick
Both of my 02's are working and LTFT's are adjusting themselves accordingly, Any ideas?

Nick
You just met my definition of closed loop fueling...O2s online, providing STFT data that the pcm is making LTFT adjustments with.

What are you talking about?
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Old Aug 23, 2007 | 08:59 AM
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Well, while scanning the car with EFI-Live, my fueling mode indicators stay showing open loop. I realize that it is theoretically working in Closed Loop due to the LTFT values chaning, it's just those two little indicator lights that are bugging the hell out of me, I have never seen the car do that before.


Nick
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Old Aug 23, 2007 | 10:54 PM
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That doesn't make any sense. Can you post your current tune and a scan of the car while this is happening?
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Old Aug 23, 2007 | 11:23 PM
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Well, thanks for the interest guys, but I managed to watch the car switch to CL after about 15 minutes of driving. Since then, the car seems to switch to CL as quickly as it did before. I am however, having another problem with my LTFT's that I will be making a new post about shortly. Thanks again!

Nick
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