Just finished building an MS-II, V3, 2.88. I am replacing a Holley Commander. I have it running and idling now. Problem I am having is that the IAC is randomly opening up causing the engine to rev up. I watched the IAC pintle while it was idling and it just drives open and stays open then randomly drives closed. Any ideas on what is going on?
Thanks.
IAC Revving Motor
Forum rules
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). For tuning/troubleshooting questions, please attached a datalog and your MSQ file to your post.
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.
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). For tuning/troubleshooting questions, please attached a datalog and your MSQ file to your post.
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.
-
devastator
- Experienced Squirter
- Posts: 333
- Joined: Mon Feb 11, 2008 10:19 am
- Location: Kinda near Tucson Arizona
Re: IAC Revving Motor
You might need to change your IAC to 15 minute, always moving, or something else to make it work properly. Also, be sure your total closing steps are slightly more, (10%), than the number of steps you have specified.
Sandrail-ACVW 2276 cc, Turbo
MS-II W/spark burning E85
The sand must be punished.
MS-II W/spark burning E85
The sand must be punished.
-
Robert Spencer
- MegaSquirt Newbie
- Posts: 27
- Joined: Fri Oct 19, 2007 6:42 pm
- Location: Washington ST.
Re: IAC Revving Motor
Devastator,
I am having IAC issue's also and I guess I don't understand your info on steps? Can you help?
Bob
I am having IAC issue's also and I guess I don't understand your info on steps? Can you help?
Bob
Ghias Rule
-
devastator
- Experienced Squirter
- Posts: 333
- Joined: Mon Feb 11, 2008 10:19 am
- Location: Kinda near Tucson Arizona
Re: IAC Revving Motor
First of all, is this set-up on a Ghia? If it is, I'd love to see it. 
The reference I was making to the steps is in the manual, but I'll try to explain what I meant in my post.
Let's say I have 200 steps from fully open to fully closed. I have set the total number of steps used by the IAC temp tables to 220. This ensures that the IAC is fully closed when completely warmed up. This may not work on all IAC steppers, but it worked on the one I was adjusting. I'm also set to 15 minute warmup.
The reference I was making to the steps is in the manual, but I'll try to explain what I meant in my post.
Let's say I have 200 steps from fully open to fully closed. I have set the total number of steps used by the IAC temp tables to 220. This ensures that the IAC is fully closed when completely warmed up. This may not work on all IAC steppers, but it worked on the one I was adjusting. I'm also set to 15 minute warmup.
Sandrail-ACVW 2276 cc, Turbo
MS-II W/spark burning E85
The sand must be punished.
MS-II W/spark burning E85
The sand must be punished.
-
Robert Spencer
- MegaSquirt Newbie
- Posts: 27
- Joined: Fri Oct 19, 2007 6:42 pm
- Location: Washington ST.
Re: IAC Revving Motor
Thanks for the explain! I have photos, where would you like them sent? It has a 2276, 52mm ChryslerTB, I made the center manifold, CB end pieces,ect.
Ghias Rule