I need some help with the initial settings of the IAC valve.
I've read the information on the IAC set-up in the manuals and attempted searches on this message board and the MSII forum. Unfortunately I just can't seem to grasp the basic set-up.
I have a MSII ECU using a GM IAC motor. When I bench test the device to try to determine the range of motion the pintle the device consistently launches across the engine bay. Because of the multiple installations of the pintle, I have no idea of the start (base) position. Can somebody walk me through the set-up and provide some initial settings that will at least get me into the ball park? I feel confident that the wiring is correct as the pintle, on start, retract and then extends. The car starts easily and idles steady (although high rpm). I can't really move forward with tuning until I set the idle parameters.
The car is fully warmed (92deg OAT) at the 142 deg mark on the Megatune screen.
Advice on this subject would be appreciated. BTW, I have the Clewett Engineering valve body.
Thanks,
Jim S.
Porsche 911 3.0l
Carrera 3.2 manifold
MSII smd 3.57
megatune 2.6
I'm in IAC heck
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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). 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.
I'm in IAC heck
80 Porsche 911 3.0
Carrera Intake/964 cams
MSII v3.57 SMD and relay board
MS II s/w 2.885 MT 225p3
Carrera Intake/964 cams
MSII v3.57 SMD and relay board
MS II s/w 2.885 MT 225p3
Re: I'm in IAC heck
Lance,
I can't thank you enough.
Your instruction helped me determine that the I had the wires swapped.
The increase in steps actually withdrew the pintle farther in the valve body.
Key troubleshooting tools were the Megatune gauge display with temp and IAC steps,
and a vacuum gauge attached to the inlet side of the IAC.
Thanks,
Jim S.
I can't thank you enough.
Your instruction helped me determine that the I had the wires swapped.
The increase in steps actually withdrew the pintle farther in the valve body.
Key troubleshooting tools were the Megatune gauge display with temp and IAC steps,
and a vacuum gauge attached to the inlet side of the IAC.
Thanks,
Jim S.
80 Porsche 911 3.0
Carrera Intake/964 cams
MSII v3.57 SMD and relay board
MS II s/w 2.885 MT 225p3
Carrera Intake/964 cams
MSII v3.57 SMD and relay board
MS II s/w 2.885 MT 225p3