Pontiac Repair: need to know about fuel pressure on 1994 sunbird pontiac, 1994 pontiac sunbird, haynes manaul
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Followup To
Question -
on a 1994 pontiac sunbird 2.0 what would be the fuel pressure while the car is running? this car is hard to start of the morning . stalls on a idle after you get it started It has a new fuel pump! i have noticed when you turn the car off the fuel pressure goes to 0 should it keep a pressure on the gauge after its turned off ? thanks
Answer -
Hi. with the key on engine stopped, there should be approximately 35 to 38 psi, if it don't hold this pressure, then it would be the fuel perssure regulator. ARE THEY A RETURN REGULATOR IN THE TANK HAYNES MANAUL SPEAKS OF IT BUT THAT IS ALL I CAN FIND OUT. SO WHAT YOU ARE TELLING ME THAT IT SHOULD BE 35 TO 38 WHEN THE KEY IS ON. WHY DOES IT GO TO 0 LBS WITH THE KEY OFF IS THAT NORMAL? YOU HAVE TO TURN THE KEY OFF IN ON 2 TO 3 TIMES TO GET FUEL PRESSURE UP BEFORE IT WILL START OF THE MORNING
Answeryes it should have pressure, do this check, with the engine running the pressure should drop 3 to 10 psi, detach the vacuum hose from the pressure regulator, the pressure should immediately increase between 3 to 10 psi, if the pressure doesn1t rise when the hose is disconnected the regulator is faulty.
