Part substitution
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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.
Part substitution
My PWM IAC Mosfet failed about a week ago. Looks like it is stuck on, as the IAC gets warm fast and it idled at 4500 RPM. I am currently running with the idle set screw run in all the way for cold idle, but I idle at about 1600 RPM warm. I have a few spare IGBTs laying around and was wondering if I could use an IGBT in place of the MOSFET on that circuit.
Re: Part substitution
The only MOSFETs I'm aware of are the two injector drivers. Can you give more details?
Dave P, London UK.
Rover V-8
MSII V3
EDIS
Tech Edge Wideband
Rover V-8
MSII V3
EDIS
Tech Edge Wideband
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Matt Cramer
- Super Squirter
- Posts: 2951
- Joined: Sat Jul 03, 2004 11:35 am
Re: Part substitution
That's a power darlington. I suspect an IGBT could work here as long as it can trigger off a 5 volt input. Some can't.
Re: Part substitution
As Matt says a Darlington pair (effectively two transistors in one case.) They are cheap as chips on Ebay. Cheaper than an IGBT.hardline wrote:http://www.DIYAutoTune.com/catalog/pcbv ... p-134.html
Was it correctly mounted on a heat-sink? Without one it could overheat and fail. If you're not using the ignition driver (Q16) remove it and mount the TIP 120 there. Otherwise fix it to the case. For either, using a mounting kit which insulates it.
Dave P, London UK.
Rover V-8
MSII V3
EDIS
Tech Edge Wideband
Rover V-8
MSII V3
EDIS
Tech Edge Wideband