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A/c Stall Help

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Old Dec 28, 2024 | 07:10 PM
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Default A/c Stall Help

I have recently inherited and 03 nb. It has a 1.8 turbo motor swap with a light weight flywheel I am also told it has bigger injectors but I do not know for sure. I don't know much about it as it was pretty much given to us. I was told it was tunned by a "decent" shop. I am new to MS so please bare with me and all my noob BS. I come from the HP tuners world. I have been all over these forums looking and finding great info for the last couple of weeks. The car ran like **** when I first got it the first thing we did was fill it with smoke and found it pouring out of the intake manifold and behind the throttle body. I have snice fixed all that.

I finally got the car to start halfway decent and go into CL Idle which I am not 100% sure if it was the correct way. Now my issue is when the A/c kicks on and idles up everything is fine until I touch the pedal. Doesn't matter what I do tap it or rev it the second I let off the cars dead. It will then start right back up and do the same until I do anything to it again. It does not stumble or try to catch or anything and honestly I dont know where to go. If anyone could point me in the right direction and or let me know what the hell I'm doing wrong it would be greatly appreciated!

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Old Dec 28, 2024 | 08:36 PM
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You need to tune your initial duty table, it's currently all zeros. The idle valve returns to this value when CL idle conditions are met, then CL idle adjusts from there.

Take a log only idling from cold to hot, look at the idle duty, and enter the values for the initial duty table rows, 20, 50, 80, 110, and 140. I'd probably get rid of 20 and add a 190 row, btw.
Old Dec 28, 2024 | 08:38 PM
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Originally Posted by curly
You need to tune your initial duty table, it's currently all zeros. The idle valve returns to this value when CL idle conditions are met, then CL idle adjusts from there.

Take a log only idling from cold to hot, look at the idle duty, and enter the values for the initial duty table rows, 20, 50, 80, 110, and 140. I'd probably get rid of 20 and add a 190 row, btw.

Thank you! I log it tomorrow and get it changed and go from there.
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