PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

LT1 wont idle in open loop!

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Old Jun 30, 2008 | 11:34 PM
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Default LT1 wont idle in open loop!

I have a 1995 lt1 car that wont idle until it goes into close loop. the BLMs go up to about 148 then it will idle, when its in open loop and the BLM at 128 it wont idle, i have tuner cats what tables do i change to fix this?? thanks
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Old Jul 1, 2008 | 09:14 AM
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Quick and dirty way is to scale your injector flow back. What size injectors are in it?
If the injector flow is right, along with the displacement, then recalibrating the MAF table is the way to go.
Maybe post the specs on the set up and the tune. I tune a butt load of LTs.
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Old Jul 1, 2008 | 09:34 AM
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its a 383 le2 heads BRE custom grind cam, 36pound injector,58mm tb,LT headers,true duals,how do i recalibrate the MAF?
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Old Jul 1, 2008 | 02:19 PM
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Originally Posted by 383racecar
its a 383 le2 heads BRE custom grind cam, 36pound injector,58mm tb,LT headers,true duals,how do i recalibrate the MAF?
Why dont you start by posting your tune. Or email it to me @ edcmat-l1@msn.com.
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Old Jul 1, 2008 | 02:27 PM
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thanks for the help i got it figured out.
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Old Jul 4, 2008 | 01:16 AM
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My LT1 won't idle correctly either.. LOL. With the stock air tube in place, the car would turn over and actually run as long as my foot was on the accelerator. The moment i took it off the accelerator and it idled, it IMMEDIATELY died. This is one a fresh rebuild with 0 miles on the motor. The throttle body is a BBK 52mm. The buttlerflys open just fine, but could it be the throttle position sensor went bad?
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Old Jul 4, 2008 | 02:46 PM
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Originally Posted by officermartinez
My LT1 won't idle correctly either.. LOL. With the stock air tube in place, the car would turn over and actually run as long as my foot was on the accelerator. The moment i took it off the accelerator and it idled, it IMMEDIATELY died. This is one a fresh rebuild with 0 miles on the motor. The throttle body is a BBK 52mm. The buttlerflys open just fine, but could it be the throttle position sensor went bad?
You either need to crack the throttle open with the idle screw, or drill the throttle blades, or both.
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Old Jul 4, 2008 | 06:16 PM
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Or you have an injector or regulator problem. Same thing happened on my old LT4, it was an injector.
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