Shogun
NAXJA Forum User
- Location
- Arizona Territory
I am having a problem with the motor at intermittant/random times. Its been doing it for a couple years, but rarely(once or twice monthly). Its becoming more frequent (every 5-10 minutes)
Under load or cruise the engine seems to hiccup very harshly. It almost feels like its completely reversing for a split second. The vehicle jerks back, the tach drops, the entire driveline bucks, and then its fine. If you were holding a cup of coffee it would probably spill (but then all coffee drinkers spill). It only hiccups once, maybe twice, for a moment, then runs fine. But it is a complete shutdown/reversal of drivetrain.
What its not; fuel starvation. Fuel pump failure or starvation is a very gentle loss of power, wouldnt even know it unless on the throttle.
89, renix, 4.0/auto, completely stock except for air filter and ford 8.8 (neither of which changed situation).
I am wondering about TPS and CPS, but dont know what they actually do, or the failure modes.
Any thoughts would be appreciated........
Under load or cruise the engine seems to hiccup very harshly. It almost feels like its completely reversing for a split second. The vehicle jerks back, the tach drops, the entire driveline bucks, and then its fine. If you were holding a cup of coffee it would probably spill (but then all coffee drinkers spill). It only hiccups once, maybe twice, for a moment, then runs fine. But it is a complete shutdown/reversal of drivetrain.
What its not; fuel starvation. Fuel pump failure or starvation is a very gentle loss of power, wouldnt even know it unless on the throttle.
89, renix, 4.0/auto, completely stock except for air filter and ford 8.8 (neither of which changed situation).
I am wondering about TPS and CPS, but dont know what they actually do, or the failure modes.
Any thoughts would be appreciated........