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The Terminator
Engine/Tuning
If I measure the fuel pump voltage?
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<blockquote data-quote="Jiffy" data-source="post: 15650982" data-attributes="member: 124414"><p>ok found the issue!!</p><p></p><p>It turned out to be the PPRV!! So, it was totally gummed up with crud (I have always run the car to almost empty) and the PPRV was sticking due to all the crud clogging it up. What would happen, was the car would start due to residual fuel pressure in the rail, then the fuel pressure would erode as the idling engine consumed it, and the ECU would command more voltage to the pumps to raise the fuel pressure. The valve would be stuck closed, the fuel pressure behind the PPRV would build and build until it was reaching around 130PSI and the valve would open, the pumps are running flat out and LOADS of pressure hits the fuel rail, the FRPS would say "WHOA!", the pumps would close down, the PPRV would close, the fuel pressure was trapped in the rail, and the 60lb injectors couldn't open far enough to allow the revs to build because there was too much pressure behind them, then as it reduced down as it was consumed at idle the FRPS would command 'more fuel" and off we'd go again!</p><p></p><p>Pulled the tank, checked the PPRV, found it clogged with shit, cleaned it out and VIOLA!! 575rwhp at 14lbs with a 2.3L G2 Whipple (3inch upper), JLT Ram Air, Accufab SBTB. Thank **** for that....</p></blockquote><p></p>
[QUOTE="Jiffy, post: 15650982, member: 124414"] ok found the issue!! It turned out to be the PPRV!! So, it was totally gummed up with crud (I have always run the car to almost empty) and the PPRV was sticking due to all the crud clogging it up. What would happen, was the car would start due to residual fuel pressure in the rail, then the fuel pressure would erode as the idling engine consumed it, and the ECU would command more voltage to the pumps to raise the fuel pressure. The valve would be stuck closed, the fuel pressure behind the PPRV would build and build until it was reaching around 130PSI and the valve would open, the pumps are running flat out and LOADS of pressure hits the fuel rail, the FRPS would say "WHOA!", the pumps would close down, the PPRV would close, the fuel pressure was trapped in the rail, and the 60lb injectors couldn't open far enough to allow the revs to build because there was too much pressure behind them, then as it reduced down as it was consumed at idle the FRPS would command 'more fuel" and off we'd go again! Pulled the tank, checked the PPRV, found it clogged with shit, cleaned it out and VIOLA!! 575rwhp at 14lbs with a 2.3L G2 Whipple (3inch upper), JLT Ram Air, Accufab SBTB. Thank **** for that.... [/QUOTE]
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If I measure the fuel pump voltage?
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