Question about 1994 Ford Econoline

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1994 E250 2 weeks ago suddenly had problem starting after warm. After cranking W/o throttle for about 15 seconds it started. Idle was erratic and wants to die occasionally.After warm up now it hesitates while driving feels like someone cuts it off. After New fuel filters, Distributor, IACV,and a chemical throttle body cleaning, still has same problems. Fuel pressure cks good. HELP!!

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Go over the wiring in the circuit. By that I mean disconnect, clean, and reconnect plugs in the circuit one at a time. Tighten any ground connections you can find and go over all the fuses in the fuseblock one at a time. Remove the fuses and clean the wafer tips with a pink pearl eraser then replace. Do this one at a time- it costs nothing, needs no schematic, and only takes a few minutes to do.
Other than that you might be able to rebuild the individual fuel injection nozzles with a kit- my Honda has a $10 kit to replace the rubber o-rings, etc for each injector, don't know if this is the case with your Econoline. Because you have this failure when it is warm means that something isn't operating correctly due to physical changes that are out of tolerance when hot because of corrosion or wear. This could be a lot of things.

I'd also check the quality of the spark- ie ignition coil/transistors. Heat can push these out of tolerance and a weak spark acts like weak fuel. It may test good when cold, but be out of tolerance when warm. So look up your specific coil and do ohms testing with an accurate meter. Take a photo or make a diagram before you disconnect all the wires. If your ohms are almost out of tolerance on the high side when cold, then when the coil is hot the ohms (resistance) will be much higher and out of spec tolerance. Ford is notorious for electrical problems and having to get the exact right part for the week day, hour and factory it was made in.
Good luck, If this fixes ya please post a rating for this solution and let me know how it turned out.

Dirty contacts make for flaky intermittent problems, erratic readings and feedback circuits with improper ECM setting due to bad readings/connections. Go over all the circuits connected to the engine. Just be methodical and do it one at a time. You can't really mess it up.

Check your OBD- there may be a code left in the can that gives a clue to your troubles if the wiring check doesn't fix it.
Good luck, let me know how it comes out and if this fixes ya please rate this solution.

Posted on Jun 21, 2009

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