Braineack

iTrader: (62)

no you dont jump those.

spec1sef

Any other advise what to check for no cam signal?

Braineack

iTrader: (62)

confirm that vr2 is getting back to pin 25 of the microsquirt header, and then from there,

spec1sef

Yes it is connected. Checked it with a digital meter.

I am posting my msq for another review.

spec1sef

I reflashed firmware and map. She fired up

Thanks Brain and Matt.

spec1sef

Brain, now it starts with stock miata MAF but as soon as I switch to GM IAT she won't start. I did the calibration and TS shows the correct IAT temp.

Since there is no polarity I just have one wire from IAT sensor going into the pin 1 and the other one into pin 6 on the stock MAF connector.

Any suggestions?

Braineack

iTrader: (62)

you didnt remove the ST_SIGN Fuse, did you?

spec1sef

Yes I did unless that's the wrong one. Please see attached picture.

Braineack

iTrader: (62)

yeah that's correct. sounds like the fuel pump is not operating, which is driven by the high side driver circuit.

spec1sef

Is there any harm in tuning with the stock MAF connected?

It's ideling very nice but I would like to be able to use GM IAT.

If I hookup GM IAT and keep cranking it feels like it wants to start but never starts.

Braineack

iTrader: (62)

jump f/p and gnd and try without the afm.

spec1sef

She runs with jumping f/p and GND

Braineack

iTrader: (62)

yeah, you did the fuel pump circuit wrong.

spec1sef

I have,

IN --> Fuel

Out --> 1C