- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Your 1990 will have an IDI 7.3 diesel engine in it and there isn't much you can do. You can turn up the fuel, but that is dangerous without gauges. Another option is to install an aftermarket turbo. If you want to turn up the fuel here is a link to the page that explains it. MAKE SURE YOU INSTALL A PYROMETER ( EGT gauge) FIRST!!!
If you don't have any light in dash,
make shore all fuses are ok
complete tune up done
replace fuel filter and then the last thing would be timing...
oh! don't forget to clean carburator with carburator cleaner: instruccions in the bottle!
According to my Haynes Diesel Engine Repair manual this is a list of possible causes.
1.Slow idle incorrectly adjusted
2.Fast idle is inoperative
3.Restricted fuel return system
4.Glow plugs turn off too soon
5.Insufficient fuel suuply to injector pump
6.Injector pump malfunction
7.Incorrect, contaminated or poor quality fuel
8.Air in fuel.
The manual is part number 10330 anywhere they sell Haynes manuals ($20). It has a very good section on the 7.3 especially if you don't want to spend money at a diesel shop every time it needs work. Hope this helps.
I'm looking at a picture which I don't have any way to send to you so I'll describe as best I can. Standing in front of the truck, the injector pump is just to the right of a rad hose. I can se what appears to be throttle cable and linkage on the left side of the pump and a fuel line going into the center of the pump. On the immeciate right side of that fuel line are 2 electrical fittings mounted front to back. The front one, which seems to have 2 wires in this photo, is the fuel shut-off solenoid. There is nothing to tell me what the back one is and there is nothing to tell me what the electrical plug-in on the front of the pump to the left of the fuel line is either.
Failing this simply pinch of the fuel return line. This will stop the engine. Hope this helps.
that fuse powers pcm fuel heater and some other things. when the fuse blows the pcm shuts down. causing it to not run. usually its the heater that is bad. it is located at the back driver side by the fuel pump. you can unplug it and see if it starts. if so you will need to replace the heater
it sounds like your fuel lines aren't maintaining pressure and the angle is allowing too much fuel to drain out of the lines. i have the same issue with and older f350 diesel if i let it sit a while and it doesn't get started.