Is my IAC motor bad?
Hi all, I got the new software update loaded and working, my IAC numbers are still not staying steady, I made a data log maybe you can look at it and see if anything stands out that might help me straighten out this problem. I have not driven my truck yet, it has only idled in the driveway when I made the data log. thanks
Uploaded files:- You need to login to have access to uploads.
Looks like your AFR Learn setting is hanging around -30, which is almost maxed out. You can try lowering your cam setting. If you are currently using 2, then use 1. If you are already at 1, then you can try lowering your engine size to get this number less negative. Once you send your new cam setting to the ECU, shut the engine off, let set a minute, and restart. Then you can try adjusting your IAC again by turning your idle screw in a tiny bit, turn engine off, wait a minute, turn engine back on and check IAC again, etc.
OK thanks I will give that a try
Make sure your engine is over 170 deg before attempting to adjust IAC.
Hi, I figure I should give some specs an my engine to help with this. I have a 1985 Dodge 360 LA engine with 8.0 to 1 compression, a Edlebrock performer intake, stock Chrysler electronic ignition with 12 degrees initial timing, stock cast iron exhaust manifolds, single 2.5" Flowmaster muffler and a MoPar performance camshaft with 0.430 intake lift/0.450 exhaust lift, 260 intake duration and 268 exhaust duration with a 110 lobe seperation. I hate this cam but it is what is in it. I am running this engine in a 1985 Dodge W150 4x4 pickup. I lowered the engine size to 340 as suggested, waited for engine to reach over 170 degrees and tried to adjust IAC, It is still not maintaining a steady reading, I made another data log to look at. The truck is running good, it just wont hold the IAC numbers.
Uploaded files:- You need to login to have access to uploads.
It's looking a lot better, but looks like you went a little too far with the idle screw. You need now to back it out a little. You never want the IAC to get down to 0. What do you have your cam setting number at?
Cam setting is #1
In the data log that I sent you the IAC numbers were going up and down without me making any adjustments at that point it went all the way up to 15 and came back down and settled at zero without touching the throttle or making an adjustment on the screw
ok just adjust the IAC by increasing it a tad by turning the idle screw out a fraction of a turn. If it starts out a little higher and still goes down to 0 then I'd say it's time to change out the IAC motor. I had to do mine, but it was moving around A LOT MORE than yours is. So in your case I'd play with it a little more to make sure. In the last log you sent me, once the engine rpm settled, the IAC was basically going down steadily.
When I turn the screw out very slightly I get no response so I keep adjusting a little bit a little bit a little bit then it starts to respond but then it also kind of runs away I can’t seem to get it to just adjust and stay in one spot