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

Rough idle and stalls

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Old Sep 25, 2013
  #1  
TimD's Avatar
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From: Huntsville,tx
Rough idle and stalls

Hey y'all my name is Tim I'm new to the need some help here got a 1992 ford ranger 4.0 5 speed manual engine starts and cranks up but runs very rough and dies But when I unplug the vacuum line going to the fuel pressure regulator and it will stay running but hesitates when give it gas there no signs of fuel in the vacuum line old spark plugs were fouled out solid black like it is dumping too much fuel runs very rich it has very strong spark and fuel pressure is between 35-40
Need help please
 
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Old Sep 26, 2013
  #2  
TimD's Avatar
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From: Huntsville,tx
Well I guess no one on this site knows anything either
Since no replies thanks for nothing y'all
 
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Old Nov 16, 2019
  #3  
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From: Brush, Colorado
I am your GOD! LOL

You wanna know whats wrong with your Ranger? Ill tell you because no one anywhere seems to have fugured it out but me. Had the same issues eveeyone gas been having and i finally discoverd why. Your camshaft synchronizer or oil pump driveshaft or oil pump drivegear or oil pump sprocket..all depending on whether or not theres a sensor mounted on top of it is shot! Its mounted on the back of your motor on the passenger side behind the intake. It spins off your camshaft and turns your oil pump. The pump shaft and inside of pump gear shaft have machined grooved teeth so that they mesh together. Well after tine they wear down and then begin to slip and only catch each other once in a while and eventually not at all. I guarantee thats what's wrong! You can thank me now....😁
 
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