swapped to tpi can't find part
07-01-2012, 01:52 PM
#1
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Car: 91 RS
Engine: 350
Transmission: T5
Axle/Gears: Posi 3.73
swapped to tpi can't find part
I swapped to TPI off of a 87 IROC from TBI and I can't find a fuel pressure switch for that system because the 91 had a 3 wire switch for oil pressure combined.
07-01-2012, 07:14 PM
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Car: 89 Camaro RS
Engine: 350 TPI
Transmission: 5 Speed
Re: swapped to tpi can't find part
How did you do your wiring? Did you swap the tpi harness complete? Or did you splice it into your old tbi harness? I'm guessing you have a 91? We need more info on what you have and what you did so far.
07-01-2012, 07:22 PM
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Car: 89 Iroc
Engine: 5.7 Tpi
Transmission: WC T5
Axle/Gears: 9 bolt/stock
Re: swapped to tpi can't find part
The RS was a 91 and yes the TBI harness was modified and spliced into......probably wasn't the best way to go but...... it is starting and it will idol just very rough because the timing still has to be fine tuned and the pump hasn't been swapped out.
07-01-2012, 11:47 PM
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Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: swapped to tpi can't find part
Cut the 3 wire connector off the TPI harness and solder on the 2 wire connector from the TBI harness
so you can use original TBI OP switch
Remaining OP gauge wire from the TPI harness goes to TBI OP sender unit
07-02-2012, 09:14 PM
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Car: 91 RS
Engine: 350
Transmission: T5
Axle/Gears: Posi 3.73
Re: swapped to tpi can't find part
You described it perfect just backwards, the 91 was the TBI with the 3 wire connection at the switch and the TPI was a 87 harness with 2 wire orange and white/tan connection.
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