Coasting2aStall
Member
- Joined
- November 25, 2017
- Messages
- 43
- Reaction score
- 5
- Year, Model & Trim Level
- 1994 Ranger
Ok, this is 1994 Ranger with 4.0L OHV and manual transmission. No codes. OBD 1 so any codes probably pretty vague if they did exist. Think of this as a 1993 Explorer drivetrain.
It starts easily cold, runs fine, no stalling. Cold idle around 800rpm. No roughness. After engine warms up and I coast to a stop, it stalls. Quick and clean stall, no hesitation, like if I had turned engine off. You can see it all of a sudden drop 600rpm on tach to zero. Restarts easily and will idle at that point around 600rpm. No hesitation accelerating. May or may not rinse and repeat next time I come to a stop. IT WONT DO THIS IF ENGINE STILL COLD!
Previous owner replaced some stuff including, I suspect, MAF sensor, as its clean, pretty and shiny. I pretty much replaced the rest including new fuel pump and new fuel pressure regulator, oxygen sensors, coolant temp sensor, and throttle position sensor. The IAC in particular, no less than THREE times. Ranger of this era didnt have an EGR so that isnt a consideration.
It starts easily cold, runs fine, no stalling. Cold idle around 800rpm. No roughness. After engine warms up and I coast to a stop, it stalls. Quick and clean stall, no hesitation, like if I had turned engine off. You can see it all of a sudden drop 600rpm on tach to zero. Restarts easily and will idle at that point around 600rpm. No hesitation accelerating. May or may not rinse and repeat next time I come to a stop. IT WONT DO THIS IF ENGINE STILL COLD!
Previous owner replaced some stuff including, I suspect, MAF sensor, as its clean, pretty and shiny. I pretty much replaced the rest including new fuel pump and new fuel pressure regulator, oxygen sensors, coolant temp sensor, and throttle position sensor. The IAC in particular, no less than THREE times. Ranger of this era didnt have an EGR so that isnt a consideration.