2000 4.0 4x4 won't start - Ranger-Forums - The Ultimate Ford Ranger Resource


4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 02-19-2013
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2000 4.0 4x4 won't start

Ok so here is my issue guys.
I own a 1999 Mazda 4x4 3.0 the motor over heated and cracked the heads so I planned to swap it for a 4.0 from a 4x4 2000 model ranger. I found a whole truck that was from a roll over. I finished the swap and now the truck won't start.

Scenario 1
3.0 computer, pats, key and ignition plug all replaced and nothing happens.

No fuel and no spark

Scenario 2
3.0 computer, pats, key and ignition plug kept in and it tries to start but does not stay running.

Gets fuel and spark but does not seem to keep spark.

I was wondering if there was something wrong with the computer from the 4.0 since it was a roll over.

It would be very easy if I could just bring it to a dealership but I'm located in Central America where the closest dealership is 8 hrs away. It would be great for some help.

Thanks,
Jakes
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Old 02-19-2013
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check the crank position switch and coil...i highly doubt its a computer issue...do you have compression across all cylinders....usually roll over motors have some internal issues from fluids getting where they dont belong
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Old 02-19-2013
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Before installing the motor I cleaned it up and turned it over with the spark plugs out. Also the compression is good on all 6.
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Old 02-19-2013
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Quote:
Originally Posted by Ka-jun28 View Post
Before installing the motor I cleaned it up and turned it over with the spark plugs out. Also the compression is good on all 6.
id say check the crank sensor
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Old 02-19-2013
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I'm replacing it with the old sensor right now. The one from the 3.0 looks the same as the 4.0
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Old 02-19-2013
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Does anyone know why it won't run on the 4.0 computer?
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Old 02-19-2013
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Ok so with the next crank sensor in it does the same thing. Does not want to stay running. Any other ideas.
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Old 02-19-2013
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getting fuel pressure?
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Old 02-19-2013
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Got fuel pressure
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Old 02-19-2013
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id check the coil next
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