Tstiles216
New Member
- Joined
- Aug 2, 2020
- Messages
- 5
- Reaction score
- 0
- Points
- 1
- Location
- Missouri
- Vehicle Year
- 1993
- Make / Model
- Ford ranger
- Transmission
- Manual
Hello, and thanks for taking the time to read this and showing your interest. I have a 1993 4.0 ranger that has been having some issues with a high idle and recently within the past couple weeks it will stall intermittently. Whenever I first start it, idle runs high around 2k +. After it runs for a minute it will idle down. Usually it runs fine after that but recently after driving for a bit the idle will spike back up around 2500 rpms if I am in neutral or have the clutch in. (Almost seems as if the hot days play a role in it as it seems to happen only when it’s hot out, temps have been pretty high the past few weeks). Then if I’m taking off from a stop or pulling around a Corner at slow speeds say like 2nd gear it just shuts off and dies. It will start back up after I wait at least 45 minutes to a hour or so. I am trying to explain this as best as possible sorry if it is confusing.
Now I will go over what I have done to try and figure this out. I put a gauge on my vacuum port of the intake and it is holding good vacuum. Koeo code of 121(TPS) and a KOER code of 172 (02 reading lean). I have gone over ground connections and those all seem to be ok. About 5 years ago the ecu went bad and unfortunately back Then before I had any knowledge of how anything worked I replaced pretty much every sensor on the truck along with the IAC and I can’t even remember all what else before I got a new Ecu and fixed the problem. I have not since checked said sensors as they weren’t bad to begin with back then and I highly doubt any of them has shit the bed in the past five years since they were unnecessarily replaced. I’m pretty stumped as to what the issue could be, could this be a intermittent fuel pump failure? Was thinking about going up to rent a pressure tester if they have one available for loan a tool service. Any input is appreciated thanks in advance guys.
Now I will go over what I have done to try and figure this out. I put a gauge on my vacuum port of the intake and it is holding good vacuum. Koeo code of 121(TPS) and a KOER code of 172 (02 reading lean). I have gone over ground connections and those all seem to be ok. About 5 years ago the ecu went bad and unfortunately back Then before I had any knowledge of how anything worked I replaced pretty much every sensor on the truck along with the IAC and I can’t even remember all what else before I got a new Ecu and fixed the problem. I have not since checked said sensors as they weren’t bad to begin with back then and I highly doubt any of them has shit the bed in the past five years since they were unnecessarily replaced. I’m pretty stumped as to what the issue could be, could this be a intermittent fuel pump failure? Was thinking about going up to rent a pressure tester if they have one available for loan a tool service. Any input is appreciated thanks in advance guys.