Cranks but will not start

  • 7.5L
  • V8
  • 2WD
  • 53,011 MILES
Ford e350 7.5L V8 460 MFI RWD 27’ Class C Motorhome.

I replaced the fuel pump and the pump regulator (because there was gas in the vacuum line going to the manifold).
Put in new plugs, and a couple of the wires, that was incredibly difficult!
Replaced the battery, and cleaned the MAP sensor.
It acts like the timing is off, reset it. But nothing.
I can turn the distributor while cranking but it doesn't change the way it’s cranking.
I checked the firing order, thought maybe it was off, looked up online according to the vin (eighth digit “G”) but it did nothing so I put it back the way it was and for a brief second it started but it shut off immediately.
It cranks and cranks, and every once in a while it acts like it’s going to hit but doesn’t.
Now it’s acting like it doesn’t have enough juice to even crank, and it’s got a good battery.
Could it be the starter or might it need a bigger battery?
And funny thing, the generator is acting the same way!
What am I missing here?
I’ve got to get it moving again. I had it running a week ago and took it for a drive, I got two blocks away from my house and it coughed and sputtered and shut off. Now it’s sitting in a parking lot and I’m afraid it will get towed.
Any thoughts or suggestions would be very much appreciated.
Do you
have the same problem?
Saturday, December 26th, 2020 AT 5:09 PM

1 Reply


Have you checked to see if there is spark to the plugs? Also, what happens if you try starting it with starting fluid? Does it start for a second and then shut off? If so, it's fuel related. If it still doesn't even try, then it's likely ignition related.

Two things to start. First, take a look through this link. It discusses the most common causes of a crank no start condition.

If that doesn't help, see if you can retrieve codes from the computer. Here is a link that shows how it's done on this vehicle:

Let me know.

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Saturday, December 26th, 2020 AT 10:54 PM

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