TBI Fuel System Question
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Joined: Jun 2003
Posts: 494
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From: Hartland, WI
Car: 1991 Camaro
Engine: 2000 LS1
Transmission: 4L60E SS3600
TBI Fuel System Question
Is the stock TBI Fuel Pump's 20 PSI rating regulated by voltage or is it just a flat out different pump than a TPI car's pump?
If regulated by voltage is it the ECM, the Relay, or Other that regulated how much voltage the pump is getting?
If regulated by voltage is it the ECM, the Relay, or Other that regulated how much voltage the pump is getting?
Joined: Mar 2000
Posts: 43,187
Likes: 42
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
It is regulated by a pressure regulator that sends the fuel that isn't needed to maintain the pressure back to the pump.
You can use a TPI pump in a TBI system, but stock, the TBI pump would not have adequate pressure to feed a TPI system.
The voltage going to either pump is battery/alternator voltage. It is not controlled except actually sending the power to the pump.
You can use a TPI pump in a TBI system, but stock, the TBI pump would not have adequate pressure to feed a TPI system.
The voltage going to either pump is battery/alternator voltage. It is not controlled except actually sending the power to the pump.
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92camaroJoe
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Aug 13, 2015 06:07 AM