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View Full Version : stock TPI fuel pressure?


maroman88
10-15-2006, 12:26 AM
what should my fuel pressure be at idle on a stock TPI system? i thought it was over 40psi right? i tested mine and its at 35psi all the time. when i rev it up it will spike to about 42psi then go right back to 35psi even if i hold the throttle open at a constant rpm. is that ok or sound like a bad fuel pressure regulator or fuel pump?

V
10-15-2006, 01:53 AM
i want to say its about 43.5psi stock

JSPERFORMANCE
10-16-2006, 08:10 AM
43.5 with vac line off (wot) 36 at idle depending on vaccum

maroman88
10-16-2006, 06:10 PM
it always stays at 35psi, if i bring up up to 3k rpm and hold it the psi will jump to 43 and then drop quickly to 35psi again.... im thinkin a FPR but have no idea. the car also stuters and sometimes stalls but always starts back up

JSPERFORMANCE
10-16-2006, 07:57 PM
when the vacuum line is plugged in that is normal operation.. the fuel pressure varies with vacuum signal

conlinj
10-17-2006, 01:07 PM
WILL RACE FOR $$$

or Ronals ;-)

maroman88
10-17-2006, 01:40 PM
???

JSPERFORMANCE
10-17-2006, 04:06 PM
the pressure drop that is ... not the stalling

JSPERFORMANCE
10-17-2006, 04:07 PM
and yes I will race for your wheels jim