ZR-1 Net Registry Forums - Minimum Air Idle Adjustment

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- - Minimum Air Idle Adjustment (http://zr1.net/forum/showthread.php?t=27764)

tpepmeie

07-30-2024 09:43 PM

Re: Minimum Air Idle Adjustment

Oh, nvm. I saw in the other post where you had been reading the ccm and ride control modules instead of the ECM codes. I recall the 95 has kind of a hybrid ALDL connector. OBD2 style, but the ECM is obviously OBD1 for the LT5.

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XfireZ51

07-30-2024 10:07 PM

Re: Minimum Air Idle Adjustment

Todd,

94 is when GM went to 16pin ALDL which would be used for OBDII cars. LT5 got it altho still OBD1

XfireZ51

07-30-2024 10:12 PM

Re: Minimum Air Idle Adjustment

Quote:

Originally Posted by scorp508 (Post 343783)

On a cold start when the desired idle is still 1250 it looks like IAC is at 110.

Once warm and desired idle of 850 the steps are around 30-40.

So looks like u should open TB a bit further which then would require fewer IAC steps for idle.
Again, make sure u re-check TPS v whenever u change TB opening.

scorp508

07-31-2024 01:32 PM

Re: Minimum Air Idle Adjustment

Quote:

Originally Posted by XfireZ51 (Post 344332)

So looks like u should open TB a bit further which then would require fewer IAC steps for idle.
Again, make sure u re-check TPS v whenever u change TB opening.

That was before getting my adjustment done properly yesterday. Now It's low-mid 20s once warm at a 850 idle, but I'll try to get it a little lower when I have some time. :cheers: I'm nearly out of thread on the stop screw, so there's not much more to give unless I get a longer screw.

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