i have a 90 sc 5spd, after a nice burnout leaving a gas station the car won't go into boost. This has been an ongoing problem since that night nearly 2 1/2 years ago. Before you ask, yes!, I have a check engine light, its throwing 3 codes, 22, 54, and 98. MAP, ACT, and passenger side o2. I don't think any of those codes are causing my problem though. For some reason when the car tries to go into boost it starts bucking, the tach drops to 0 and as soon as you let off the throttle its back to life again and tack works fine.
the harmonic balancer isin't warped and is spinning perfectly round
the cam sensor has been changed with a new unit
dis module has been changed as well
new plugs/wires
new fuel pump
new fuel filter
new adjustable ford fuel pressure regulator
swapped ecu's
swapped maf with a known working one
verified no vacuum leaks
no visible fuel leaks, but car does loose fuel pressure after an hour (40 to 10)
the sc belt isin't loose nor is the s/c slipping (no visible belt wear)
i've tried reseting the ecu and still have the same problem.
idle is high sits at about 1k. I haven't checked the tps yet but i will yet i don't think thats the problem.
the car seems to run as though its not getting enuff fuel but i can smell it big time. today i think fuel even came out the tail pipe. i'm thinking that maybe the fuel injectors are leaking and thats causing me to get terrible gas mileage along with the gas smell and causing it to run crappy -may explain the fuel coming out the tailpipe.
i can get the car to hit boost every once in a while, it doesn't do it often but sometimes it will. Even when it does hit boost it doesn't have any pull, seems as though its not getting enuff fuel.
also, the fuel pressure at idle is 39psi and jumps up to 50psi with a quick throttle pinch, i can't get it over 50psi no matter how hard i stomp it.
any ideas? I'm going to change out the injectors and replace the map, act, and o2s as well. if that doesn't do it i don't know what to do.
any ideas? anything i overlooked?
car is completely stock minus the aftermarket headers and egr delete.
the harmonic balancer isin't warped and is spinning perfectly round
the cam sensor has been changed with a new unit
dis module has been changed as well
new plugs/wires
new fuel pump
new fuel filter
new adjustable ford fuel pressure regulator
swapped ecu's
swapped maf with a known working one
verified no vacuum leaks
no visible fuel leaks, but car does loose fuel pressure after an hour (40 to 10)
the sc belt isin't loose nor is the s/c slipping (no visible belt wear)
i've tried reseting the ecu and still have the same problem.
idle is high sits at about 1k. I haven't checked the tps yet but i will yet i don't think thats the problem.
the car seems to run as though its not getting enuff fuel but i can smell it big time. today i think fuel even came out the tail pipe. i'm thinking that maybe the fuel injectors are leaking and thats causing me to get terrible gas mileage along with the gas smell and causing it to run crappy -may explain the fuel coming out the tailpipe.
i can get the car to hit boost every once in a while, it doesn't do it often but sometimes it will. Even when it does hit boost it doesn't have any pull, seems as though its not getting enuff fuel.
also, the fuel pressure at idle is 39psi and jumps up to 50psi with a quick throttle pinch, i can't get it over 50psi no matter how hard i stomp it.
any ideas? I'm going to change out the injectors and replace the map, act, and o2s as well. if that doesn't do it i don't know what to do.
any ideas? anything i overlooked?
car is completely stock minus the aftermarket headers and egr delete.