Hi!
I've got a 1999 volvopenta 4.3 gi. Rust in the fuel filter packed up the fuel system so ended up with a new high pressure fuel pump, low pressure fuel pump, cleaned out the vacuum canister, cleaned out the fuel lines, cleaned out the throttle body, replaced the pressure regulator in the throttle body and replaced both injectors.
There are no diagnostic error codes (other than the code indicating that the code reader is attached to the engine).
The fuel pressure is about 7 pounds at the low pressure schrader valve and 28 pounds at the high pressure schrader valve.
The engine starts and runs fine until I exceed 3000 rpm. One of the injectors shuts off instead of increasing fuel amounts. The engine stalls and quits.
Switching the injector wires from one injector to the other changes which side the shutdown occurs on.
Continuity checks indicate no broken wiring.
If this were carbureted, I would look for a dead WOT supressor on the distributor lead, so I went ahead and changed out the ignition contol module.
The new ICM added power, but didn't change the injector behavior.
I've checked the idle valve, map sensor, throttle position sensor, oil pressure sensor and temperature sensor. All are in spec with the SELOC manual. Disconnecting any of them results in an appropriate DST which I clear from the PCM.
I'm about to change the PCM, but before I pop for a new computer I thought I would ask if anybody else has experienced this problem.
Thanks for your help
itsmike
I've got a 1999 volvopenta 4.3 gi. Rust in the fuel filter packed up the fuel system so ended up with a new high pressure fuel pump, low pressure fuel pump, cleaned out the vacuum canister, cleaned out the fuel lines, cleaned out the throttle body, replaced the pressure regulator in the throttle body and replaced both injectors.
There are no diagnostic error codes (other than the code indicating that the code reader is attached to the engine).
The fuel pressure is about 7 pounds at the low pressure schrader valve and 28 pounds at the high pressure schrader valve.
The engine starts and runs fine until I exceed 3000 rpm. One of the injectors shuts off instead of increasing fuel amounts. The engine stalls and quits.
Switching the injector wires from one injector to the other changes which side the shutdown occurs on.
Continuity checks indicate no broken wiring.
If this were carbureted, I would look for a dead WOT supressor on the distributor lead, so I went ahead and changed out the ignition contol module.
The new ICM added power, but didn't change the injector behavior.
I've checked the idle valve, map sensor, throttle position sensor, oil pressure sensor and temperature sensor. All are in spec with the SELOC manual. Disconnecting any of them results in an appropriate DST which I clear from the PCM.
I'm about to change the PCM, but before I pop for a new computer I thought I would ask if anybody else has experienced this problem.
Thanks for your help
itsmike
