PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

P0121 and ASR help!

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Old Jun 1, 2004 | 08:31 PM
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Default P0121 and ASR help!

I getting this code and my asr has been tweaking out. I've changed the map min and max values to 75/85 useing HP tuners and its still tweaking. I even got a new tps sensor and nothing. Could my ported TB have anything to do with it? I aint throwing any other codes exept P0121.
Thanks.
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Old Jun 2, 2004 | 09:35 AM
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Do a search on this code.There is a lot of information. I ended up changing an AC sensor to fix the problem you are having. There is a lot of info on why this happens if you search on p0121.
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Old Jun 2, 2004 | 11:01 PM
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Originally Posted by Steve Burger
Do a search on this code.There is a lot of information. I ended up changing an AC sensor to fix the problem you are having. There is a lot of info on why this happens if you search on p0121.

Does this code tweak out the asr?
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Old Jun 18, 2004 | 02:42 PM
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I got the exact thing problem myself! Driving me nuts cuz the car starts shifting funny as well and goes into limp mode...
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Old Aug 29, 2004 | 11:12 PM
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Originally Posted by SAINT WS6
I got the exact thing problem myself! Driving me nuts cuz the car starts shifting funny as well and goes into limp mode...
Me too, did you ever find a fix for it? Hey I live in dallas, we should race sometime
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Old Aug 30, 2004 | 06:44 AM
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It's actually being fixed right now, but from what I've heard, you just have to change the MAP min/max test parameters to like 65/85, or higher than stock, using LS1Edit. That should cure it.
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Old Aug 31, 2004 | 06:49 AM
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I just did this on a buddy's car and the min/max values were adjusted. Fixed his problem.

Chad
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Old Sep 11, 2004 | 12:02 PM
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This seems to have fixed it, but my car surges alot now and the ltrims are way off again.
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