I'm running megasquirt I V3
So both injector drivers Q9 and Q12 are getting extremely hot when I have the car in the on position and not running. My fuses to my fuel pump also keep popping. I've been over my harness and there is nothing showing any signs of shorts. I'm looking at my board as being my culprit and I need a place to start looking.
Fuel injection driver and fuel pump issue
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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.
Fuel injection driver and fuel pump issue
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Matt Cramer
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Re: Fuel injection driver and fuel pump issue
Those are the flyback circuit, not the injector drivers. Do they get hot on a Stimulator?
Re: Fuel injection driver and fuel pump issue
Haha I figured that out about 5 mins after posting that. Not from what I've seen they only get hot when they are on the car. I will need to make double sure but I think my statement holds true.
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Re: Fuel injection driver and fuel pump issue
So it only gets hot on with the MS on the car. the stim runs everything correctly.
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Matt Cramer
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Re: Fuel injection driver and fuel pump issue
Check D5 and D7, make sure they aren't in backwards. Do you have high or low impedance injectors?
Re: Fuel injection driver and fuel pump issue
D5 and D7 should be in correctly with the silver stripe facing the DB37 connector. I'm running high impedance injectors at the moment. But I will be switching to low impedance as soon as I can figure out these few problems. Also should there be any reason why the fuse to my fuel pump keeps blowing out everytime I turn the car on?
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