Diypnp no rpm,no start and frying coils
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Diypnp no rpm,no start and frying coils
1995 Miata M edition home brew sr20 t25 turbo setup built a diypnp 76 pin ecu meticulously wentover the board and loaded firmware off diys website put all the jumpers and whatnot in snd I cannot get an rpm for the life of me the car ran fine just lean with the stock ecu I don't know what I did wrong but loaded a start up map off their site and double checked the ignition setting burnt the first coils out and just burnt the second ones like smoke coming off of them I'm pulling my hair out I thought this would be fun. Any info would be greatly appreciated
Last edited by Thomas4g63; Oct 11, 2016 at 12:40 PM.
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Did you load the firmware onto the board when it was installed in the car? If so, that's a good way to fry the coils. Also, if you're using the air temperature sensor as opposed to the MAF, you will have to do a little wiring to get the fuel pump working.
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you put a resistor where a diode should go. the idle valve flyback protection...
you need to remove r39.
you need U5 installed.
You have your INJ outputs going to both your injectors AND coils.
What directions are you following, because youre not being as meticulously as you think.
you need to remove r39.
you need U5 installed.
You have your INJ outputs going to both your injectors AND coils.
What directions are you following, because youre not being as meticulously as you think.
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From: your mom's house phoenix, AZ
1995 Miata M edition home, brew sr20 t25 turbo setup. I built a diypnp, 76 pin ecu, meticulously went over the board and loaded firmware off diys website. I put all the jumpers and what not in according to the instructions, and I cannot get an rpm for the life of me. The car ran fine, just lean, with the stock ecu. I don't know what I did wrong, but loaded a start up map off their site and double checked the ignition settings, then burnt the first coils out, and just burnt the second ones... like smoke coming off of them. I'm pulling my hair out, I thought this would be fun. I was wrong, should have had someone else built it. Any info would be greatly appreciated.
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Test the voltage on the spark outputs with the key on and engine off. It should be zero. Let me know what you measure.
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Please post a composite log of an attempted start. This will tell us more about the no-RPM issue.
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Also, remove R20 and R39, if you have not already done so.
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After. No point in recording the composite log with a known assembly error.
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