Just want to verifiy that I have my IAC working correctly. My idle speed is way too high, about 1400 rpm.
When I power up my MS II, the pintel extends, stops, then backs itself in about 1/2 way.
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I did a check for vacuum leaks, removed all vacuum accessories, made sure all the tbi and adapter plate bolts were tight, gaskets are all brand new.
Thanks
Edit: Just looked at my data log, looks like I may have the MAP line unhooked. which would explain the high idle.
GM stepper IAC / Idle speed too high
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
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bluethunder1975
- MegaSquirt Newbie
- Posts: 4
- Joined: Sat Feb 23, 2008 9:22 pm
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bluethunder1975
- MegaSquirt Newbie
- Posts: 4
- Joined: Sat Feb 23, 2008 9:22 pm
Re: GM stepper IAC / Idle speed too high
I just checked the wiring, according to the pictureLance wrote:bt75,
When first powered up, the IAC should retract, then extend. So you might have it wired backwwards. There info on how to correct that here: http://www.megamanual.com/ms2/IAC.htm#wiring
Lance.
With the nub on the top, looking from the back of the connector (where the wires come out, not the pin side)
I have the blue on top, and the green on the bottom (DIY autotune harness), and those wires go to the right pins.. Would it make any difference if I got pin 27 and pin 25 backwards? I'm positive I rung out the wires, but they are labled IAC-1 and IAC-2 only (not A or B)
Any other suggestions?
Thanks
*Edit
Just checked the MS board, it is correct. So either I've got some wierd GM stepper IAC, or I'm not reading something right.