1999 Volvo Penta Fuel Regulator

[dfairchild6]

99 volvo penta 5.7 gsi , plug return fuel line at tbi 60 psi, can I put a external fuel pressure regulator in return line and set it at 30psi ?

 

[Scott Danforth]

welcome aboard

you NEVER plug the return line to test a regulator, you pull the vacuum line to test a regulator. plugging the return line deadheads the pump

 

[dfairchild6]

trouble shooting, I plug return line to deadhead pump, to check pressure, old pressure was 15 psi. boat would start,would not idle or stay running. i get a code 22 low voltage on tps , would that have any thing to do with fuel pressure? i read comments they rebuild reg.still not wright fuel pressure, or find reg, kit with 30 psi spring. so i was thinking about an external reg. in return line. would that work?

 

[dfairchild6]

I plugged return line to deadhead pumps to check fuel pressure. (trouble shooting) my pressure was 15 psi boat would start, would not idle or stay running. i read comments they rebuilt fuel pres reg. or having trouble finding a kit with 30 psi spring, still not right.so i was wondering if a external reg. in return line would work? i get a code 22 would tps have anything to do with fuel pres?

 

[Scott Danforth]

If you have TBI, 15 psi is correct.

if you have MPI, 45 psi is correct

TPS (Throttle Position sensor) has nothing to do with fuel pressure, or even fuel.

 

[dfairchild6]

put ex, reg, in return line set @ 28-30 psi manual reads 24 psi to start. should have 30 psi when turn key on for 2 seconds. volts on tps 4.39( manual .7-4.48)
wot .62 (manual .3-.90) still get code 22 low volts unplug map. idles good, throttles good. any ideas?