4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

Engine Randomly Dies but no Check Engine light

Old 10-23-2018
Thread Starter
Join Date: Oct 2018
Location: Hastings
Posts: 1
Engine Randomly Dies but no Check Engine light

I have a 99 Ranger 4.0 with 190k on it. I've been having issues with the engine dying on me. The first time it died was slowing down for a stop sign. I stoped it, turned the key of and put it back into park. As soon as I turned the key off, I imediatly turned it back on and it fired right off. It then died during idle after I went to start it after class. Same thing with the key, turned it off then turned it on and it fired right off again. Then it promptly died before I put it in drive. It did this 2 more time. As I pulled away it died after I got up to about 25mph. It started up right away again. It ran fine until I slowed down to get off the Highway and died again. It started right away again and got me home yesterday and to class fine today. The check engine light never came on during all of this so it didn't spit any codes. Is there anything I can do to fix this?
Old 10-23-2018
Grumpa's Avatar
Join Date: Oct 2017
Location: Indiana
Posts: 134
First, verify the CEL works. Turn key forward without starting it and make sure it illuminates. Second, if it is not burned out and working`, you could still have some pending codes that could shed some light on the problem. Without any more info, my first guesses would be low fuel pressure or a vacuum leak. You will need to do some diagnostics.
Old 12-14-2018
Join Date: Dec 2018
Location: LaMotte
Posts: 6
My 93 ranger STX was doing the same thing, I replace the ignition switch didn't help. I tested the fuel pressure which lead me to the fuel pump. Replace the pump and that was that.
Old 01-03-2019
martymarr_'s Avatar
Join Date: Jan 2019
Location: San jose , Ca
Posts: 1
Same thing happened to my b4000 but it also idles hard and shuts off in reverse
Old 01-28-2019
Join Date: Dec 2018
Location: Battle Ground, WA
Posts: 8
Idle air control valve.
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