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Old 04-26-2012, 08:21 PM   #1 (permalink)
wasilvers
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Officially need help - 95 Saturn settings

Ok, I had a few threads here, but now need official 'how to hookup' help.
I have a 95 Saturn SL1 (pre-obdII). I installed a mpguino and can't get it to work for me. First off, the power supply is good, the speed input is good. My problem is reading the injectors.

I read on Saturn fans that the computer switches the grounds for the injectors to control pulses. I have 2 wires connected to each injector. I tested each of these wires and can pull 12 volts from each with the key on/engine off. With key on/engine on at idle, it read 14 volts at each wire on the multimeter. I read on Saturnfans that one color wire runs straight from the fuse box and the other is from the ECU.

So I wired the mpguino injector input to the 'non fuse box' wire - I tried some of the settings and just can't get it to read an estimated fuel usage for me.

Anyone with a 95 Saturn get this to work?
Is it a lost cause on this car?

Thanks for ANY suggestions!

Will

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