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

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  #26  
Old 11-08-2011
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Quote:
Originally Posted by nicci8702 View Post
I have a manual for that year- it does not have a distributor. And..a signature? And yes, it is a '90
A signature is...

https://www.ranger-forums.com/showpo...14&postcount=1
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  #27  
Old 11-08-2011
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Will get on that. Thanks.
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  #28  
Old 11-09-2011
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I'd check the crank position sensor.
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  #29  
Old 11-09-2011
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Originally Posted by StxDangerRanger View Post
But it died when it was running. Do you think it could have jumped timing? I doubt that.
No, that's not what I said.
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  #30  
Old 11-09-2011
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In case you haven't tried yet , read the codes in the PCM.
Here's a link how to go about it.
http://www.troublecodes.net/Ford/
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  #31  
Old 11-09-2011
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I just hate wasting time and money fixing stuff, so on that note here's what I'd do (in order) if I had to fix it and I wanted to get to the point ASAP, fix it, and be done:

*Do a visual under the hood for anything disconnected or any obvious damage. Repair as needed.

*Pull a spark plug wire off, insert a spare spark plug and prove that it has spark.

*Turn the key on and off a few times, then go to the fuel rail (ie, plumbing that delivers fuel to the injectors) and, on said rail there is a schrader valve (like on your tires). Pull the cap and press on this valve to see if there is a spray.

*With the schrader valve still uncovered, hold the valve open and have someone crank it over. It should dispense fuel. Watch your eyes.

If it's proven that it's got fuel and spark, the next step is to pull DTC's. The correct repair sequence is KOEO, KOER, and CM, and withing each of those groups you begin repairs with the lowest number DTC first. The reason for this is, sometimes one code will trip otherS, and by fixing them in the correct sequence I noted, you often will make the other DTC'(s) go away.

***Some of the early 4.0's (up to ~1995 or so) suffer from no-starts due to bad EEC or fuel pump relays. It's a "slightly" common problem. Keep this note in your back pocket when doing diagnostics.
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  #32  
Old 11-09-2011
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Thanks folks, I am spending today getting it all figured out- I will let ya'll know what I come up with!
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  #33  
Old 11-13-2011
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Update: all of the sudden, ranger lost spark. I replaced the coil. Now I have spark, ranger still won't fire. We tried ether again, and it would fire but it wouldn't actually run.

I am plumb out of ideas. Anyone got anything else???
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  #34  
Old 11-13-2011
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im gonna say crank position sensor
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  #35  
Old 11-13-2011
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are you sure your getting fuel? Make sure of that first, then check the crank position sensor like DJ says
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  #36  
Old 11-13-2011
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Yep, definitely getting fuel. At least: definitely getting excellent pressure. ...
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  #37  
Old 11-13-2011
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Originally Posted by StxDangerRanger View Post
are you sure your getting fuel? Make sure of that first, then check the crank position sensor like DJ says
Oh so now you think it might be the crank trigger.
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  #38  
Old 11-14-2011
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Originally Posted by Blhde View Post
Oh so now you think it might be the crank trigger.
I honestly have no idea. Its hard to diagnose something without being there.
I only mentioned the timing earlier because the truck is a 90, the chain on that truck has got to have some slack in it by now.
Pulling any DTC codes will be almost worthless IMO also, the truck is an OBD1 truck, same as mine. you'd have to go to a body shop to get it read.
its like i said before, you need three things to get a truck to run: Fuel, Air, and Spark. I guess following that the next thing to check would be all the sensors that deal with the Air.
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  #39  
Old 11-21-2011
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Originally Posted by StxDangerRanger View Post
I honestly have no idea. Its hard to diagnose something without being there.
I only mentioned the timing earlier because the truck is a 90, the chain on that truck has got to have some slack in it by now.
Pulling any DTC codes will be almost worthless IMO also, the truck is an OBD1 truck, same as mine. you'd have to go to a body shop to get it read.
its like i said before, you need three things to get a truck to run: Fuel, Air, and Spark. I guess following that the next thing to check would be all the sensors that deal with the Air.
Update: Went ahead and tried everything I was told to on this thread. Damned thing still ain't starting. I am still at a loss. I had a family friend who owns a shop take a looksie, and that was a waste of time because he either, doesn't know what he's doing--or he truly was just stumped like the rest of us.

All sensors were fine. All filters are fine. I have gone over all the basics again and again and again. It appears to be an anomaly. At this point, I am about to give up- say screw it, part out what I can and then junk the body and look for another truck.

anyone have any other ideas?.
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  #40  
Old 11-21-2011
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At this point you are looking at a wiring issue.


Fuel pressure is good and have you verified spark? Does it run on ether?
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  #41  
Old 11-21-2011
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Went back and rechecked my fuel pressure and pump. Just. To. Be. Sure. And no pressure? at all? New symptom.
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  #42  
Old 11-21-2011
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Have you tried cycling the key on and off a few times before testing? Given the amount of time since it has been running the system may need to be primed.
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  #43  
Old 11-21-2011
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Officially out of money to spend on this truck. Last option, gonna have to try and sell it or junk it. What might be the best way to go about this? Gotta sell it asap- as it is my only vehicle and I have been hoofin it to work
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  #44  
Old 11-21-2011
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I find it difficult to believe there aren't any members here around your area that can't come over to lend a hand.
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  #45  
Old 11-21-2011
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I find it difficult to believe there aren't any members here around your area that can't come over to lend a hand.
Haven't met one yet anyway.
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