Alright. A little while ago (almost a week) I was driving on down the road- truck died. No warnings, no sputtering, to chugging-nothing. Just died. I've combed through every thing I know to look for and have yet to find the problem.

I've ruled out any issues with fuel pump, filter, injectors and lines. I've ruled out the basics: battery related, alternator, starter issues. Spark plugs and wires seem fine. Compression is a-okay as far as I can tell. I've tried ether. Nothing. I've checked distributor cap, timing chain.

I'm fresh out of ideas. I've never had an issue like this before. I keep up on my maintenance. And she wasn't even running rough before/when this happened.

Any ideas would be greatly appreciated. If more details are needed, ask and I'll do my best to explain. Thanks!

 

Will it even turn over or act like it wants to start?

 

Yeah, it does. It'll act like it wants to start

 

Weird... I got nothing. You already checked the stuff I wouldve checked.

 

My problem exactly.

 

you said spark plugs and wires were fine. are you actually getting spark from the plugs or do they just look good?

 

I'm definitely getting spark.

 

Did you check the fuel cut-off switch?

 

How are the battery wires or the connections? Over time they get corroded and fail.

 

I've checked the Fuel relay switch, the battery cables appear to be alright- though they are older, so I should replace them anyway.

 

u check all fuses as well? i know this seems dumb but sometimes i over diagnose the problem and its something as simple as a damn fuse...lol

 

Lol, I've done that before too. Made me feel like an idiot! I've checked all fuses. Each. and every. one. lol.

 

Inertia switch, maybe.
you need three things to get it to run. Fuel, Air, and Spark.

 

How might I check the switch?

 

I think on most models it is in the passenger compartment just underneath the carpet under the glove box. It is attached to the floor and has 2 wires going to it. There is a button on the top, make sure it is pushed in and once that is done, check it with a multimeter to make sure it is good. It is there to shut off the fuel pump in case of a rollover or other severe jolt to the vehicle.

 

I figured I knew what it was meant for, and where it was. The red button is depressed- so I will need to check it tonight before it gets too late/too nasty and cold outside. If that is the issue, it'll be a nice and cheap fix. HOWEVER, I am wondering-- if the switch is faulty in anyway, would it shut off the fuel pump? Because I have checked the fuel pump and can safely confirm that it's fine.

 

Yea, that switch turns off the fuel system after an accident/bump/some form of impact. To reset the system, you have to push it.

 

When you turn the key, do you hear the fuel pump cycle?
it sounds to me like you have a fuel delivery issue.

 

Yeah, if the switch is faulty, it will stop the current from getting to the fuel pump. I had a similar problem, Betsy would crank over fine and she was getting fuel, I could hear the fuel pump come on and there was some fuel coming out when I changed the filter as well. I checked the fuel pressure at the fuel rail and it was less than 5lbs. When I depressed the valve, fuel came out but normally it will spray out. I ended up changing the fuel pump (which this site helped me alot) since I also broke one of the plastic clips that keep the fuel line on and someone said to use a zip tie if this happens and it works great. Depress your schrader valve and see if any fuel comes out and if it is just a small amount, it could be your fuel filter plugged up or your fuel pump.

 

Thanks! I will definitely take another look tomorrow after work. I'm hoping I can at least get this problem diagnosed soon, this truck WAS my daily driver.

 

What year is this?

Also rent a fuel pressure to test with. Will help a lot.

 

90 4.0L, ohv. She has an intro thread. Nicole, don't forget to make a signature.

 

I don't have manuals for that year, but that truck does not have a distributor correct? But the 2.9 does.


Taken a stab in the dark here but the crank trigger may cause a no start as the computer has no reference on timing.

 

But it died when it was running. Do you think it could have jumped timing? I doubt that.

 

I have a manual for that year- it does not have a distributor. And..a signature? And yes, it is a '90