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1986 ford ranger fuel problem?
I have a 1986 ford ranger 2.9L V6 with a possible fuel problem. Just today I hopped in it and tried to start it. It cranked but would not start. So I began the usual looking it over to see what the problem was. I poured a little gas into it to prime it and it stated up and ran and continued running until I shut it off, but wouldn't start up when I tried to start it again. So I primed it again and walla it started and ran. So could it be filters, a bad fuel pump or bad injectors?
it has an electrical fuel pump, which I believe there are 2 of them as well as 2 filters. the dude that got the thumbs down that wasn't me, so I gave you a thumbs up to equal it out lol.
4 Answers
- The DevilLv 78 years agoFavorite Answer
You could change the fuel filter to eliminate that problem or possible problem. You might have all the fuel system components checked if a new fuel filter doesn't fix the problem. Yes, everything that supplies fuel to the engine is suspect, but it might only be just one bad thing.
- 8 years ago
Being a 1986, I don't recall if it has an electric pump or a mechanical pump (engine driven). But, I'm guessing mechanical since usually electrical pumps "prime" the system after a few key turns.
So, with that being said..... odds are, it's the mechanical fuel pump. They wear out. The diaphragm that pumps can get a pin hole, the pivot pin for the cam/rocker arm that runs the pump can wear and not give it full stroke.
Check the fuel hoses, if any that connect to the pump. Sometimes the hoses when they use quick release clamps, get leaks....bad on suction side. Use the regular clamps that tighten. There also could be a pin hole on the suction side, so it could "prime", but loose it's prime over night. It could be corroded fuel line.....
Change your fuel pump. I have an old forklift that has this issue. Over the years, the pump diaphragm or the pivot pin wear it it just doesn't pump. A good pump should suck and fill very quickly, w/out having to use extra starting fluid/fuel. Also, check your battery connections, usually a slow turning engine will not pump fast also.
Check your carb for fuel leaks also. Over time, there are gaskets there that can leak. If you smell fuel when hot, odds are there is a weeping gasket.
Source(s): Experience w/ fuel pumps, carbs. - monkeyboyLv 78 years ago
If it was a filter, why would it not start initially, but start when you add fuel? Why would it be a fuel pump in that case?
When it won't start, you need to check for spark, and check for fuel injector pulse. I suspect you have spark since it will run when you give it fuel, but always check those two.
Edit: Thumb down? Why? Where is my reasoning flawed?
Edit edit: I dealt with an older Ford before, had a bad injector. Usually you can check the ohms of a cold and hot injector, just need to find what spec is for them. A bad (or multiple) bad injectors can cause weird issues. Being electrical, they can cause all sorts of "intermittent" issues.
