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Caterpillar troubleshooting Im trying to help some people with a 1987 Ford Fire Truck with 3806 Cat engine. The truck was running and then shut off, and now won't start. It appears to be a fuel problem as I can get it to start and run for a bit with starting fluid. Fuel has been added (just in case), the fuel filters appear to be full. If I disconnect the fuel line to the injectors, fuel does pump out when cranking. And the fuel solenoid I removed and verified it is working too. Any ideas?

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First thing to try with any diesel that won't start is to do a diesel system bleed. This one should be before the HP fuel rail type so start by bleeding the lift pump, then the fuel filters, then the main injector pump to lines to the injectors and lastly the injectors. Good luck.

Posted on Jun 09, 2017


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Posted on Jan 02, 2017

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SOURCE: 1992 ford ranger 3.0

i was once pulling a trailer with a ranger when it suddenly lost power and the engine died. turns out the problem was with the fuel shut off inertia switch. the switch is supposed to activate in case of accident. on my model the inertia switch is located in the passenger side under the glove box. dont know where yours is located. once you find it, just push the button and see if it resets. good luck.

Posted on Sep 26, 2008

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SOURCE: topkick cat 3116 wont start

Check your fusible links; these are small wires molded into the middle of a bigger wire they are usually located up by the battery cables. When they burn they become discolored and softly flexible. Also check your relays too.

Posted on May 20, 2009

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SOURCE: 1987 ford bronco engine wont start

I had the same issue on my '86 Bronco. Change the ECM(computer) and your problem will go away.

Posted on Aug 27, 2009

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SOURCE: engine cranks but will not start

fuel filter or most likely the injectors are done

Posted on Oct 07, 2009

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SOURCE: have a F750 Ford -

probably the blue oval on the front of the unit. i have found my solution is to call a scrap dealer. you could probably get maybe 100 dollars for it then go and get something else without the blue oval. just my 2 cents

Posted on Jan 23, 2010

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1989 ford f150 it is not getting spark and wont start even with starter fluid. The truck was running and just stalled and would not start again.

Providing you are getting fuel and fire to the engine then I would check the cat and the muffler one of them is plugged and it is probably the catalytic converter. If it is it the back pressure on the engine won't allow the fuel to be drawn into the cyl. and fire. Take the o2 sensor out of the exhaust ahead of the cat and see if it will start, it will run rough be if it starts you have found the problem. Hope this helps.

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91 ford f-150

Had the same problem last year with my truck. It was the MAP sensor. Mine was on the far left hand side of the fire wall Or passenger side. Should be one vacuum line going into it. unplug it and try firing it probably wont run perfect but better. I went to a scrap yard and picked one up for $10. (They let me plug it in first to make sure that's what i needed.)As soon as I plugged it in the truck started purring like a tom cat in a dairy. If your into the scrap yard thing than its not an expensive experiment. Not sure if this is you problem ( My crystal ball works about as good as anyone else's) but its a suggestion.

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