yooper
SILVER Star
Been fighting this for a while.
12/89 FJ62, all stock drivetrain (3FE)
Fuel pump failed last spring, replaced with OEM
Fuel pressure pulsation dampener failed in the fall, replaced (cleaned out intake at same time) with OEM
Ever since the dampener service, the truck has been acting weird on start up. The problem is intermittent, worst when the engine is "slightly" warm - when it's been sitting for several hours. When it sits overnight it always starts up fine in the morning with no problems.
Starts right up on the first few cranks almost every time, then slowly dies after two or three seconds of running. Rarely I can "save" it from dieing by feathering the gas pedal. After it dies it's hard to start, cranks and cranks, sometimes sputtering for a few seconds, and eventually just fires right up after multiple tries at cranking. The worst was yesterday when I cranked about 10 times for several seconds each with nothing, and then fired right up.
If it takes more than a few cranks to start up the first time (cold) then it doesn't die at all, whatever that means.
Once it's started it runs as smooth and strong as ever.
I've gone through almost the entire FSM fuel injection diagnostic at least twice and it all checks out ok. I don't have a pressure gauge to check fuel pressure, so I haven't done the pressure checks.
All vacuum hoses are fine - intact and attached.
I adjusted the TPS per the FSM.
This behavior is similar to when the fuel pump was going bad, only it only lasted a week and then just failed that time. This time it's been several months, sometimes with a few weeks with no problems.
The intermittent nature of it makes me suspect an electrical problem.
Any ideas? ???
12/89 FJ62, all stock drivetrain (3FE)
Fuel pump failed last spring, replaced with OEM
Fuel pressure pulsation dampener failed in the fall, replaced (cleaned out intake at same time) with OEM
Ever since the dampener service, the truck has been acting weird on start up. The problem is intermittent, worst when the engine is "slightly" warm - when it's been sitting for several hours. When it sits overnight it always starts up fine in the morning with no problems.
Starts right up on the first few cranks almost every time, then slowly dies after two or three seconds of running. Rarely I can "save" it from dieing by feathering the gas pedal. After it dies it's hard to start, cranks and cranks, sometimes sputtering for a few seconds, and eventually just fires right up after multiple tries at cranking. The worst was yesterday when I cranked about 10 times for several seconds each with nothing, and then fired right up.
If it takes more than a few cranks to start up the first time (cold) then it doesn't die at all, whatever that means.
Once it's started it runs as smooth and strong as ever.
I've gone through almost the entire FSM fuel injection diagnostic at least twice and it all checks out ok. I don't have a pressure gauge to check fuel pressure, so I haven't done the pressure checks.
All vacuum hoses are fine - intact and attached.
I adjusted the TPS per the FSM.
This behavior is similar to when the fuel pump was going bad, only it only lasted a week and then just failed that time. This time it's been several months, sometimes with a few weeks with no problems.
The intermittent nature of it makes me suspect an electrical problem.
Any ideas? ???
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