No start 2002 dodge ram 1500 4.7l
20

Asked by Dylan Sep 19, 2017 at 12:41 AM about the 2002 Dodge RAM 1500 SLT LB RWD

Question type: Maintenance & Repair

Ok so i have a 2002 dodge ram 1500 4.7l
2wd motor blew, i bought an 02 durango ran
perfect, so i pulled motor and put it in my
ram, now it just spits and spudders and
backfires but wont start and run, i changed
all plugs, coils, crankshaft sensor, camshaft
sensor, and still nothing i get a code p1391 i
believe thats what it was it said crank/cam
sensor failure or somthing like that, help
please! Im stuck no ride with a 2 month old
girl

3 Answers
20

Dylan answered 7 years ago

I should also mention that i had this truck a year not running i diddnt have a need to fix it before because i had a car, then tranny quit so i got motor for truck had a half tank of gas in truck could the gas be bad enough from sitting a year or so to not run on it? Are these engines that picky?

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620

Charles answered 6 years ago

You need to match the computer settings from the donor vehicle or change the computer.

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Ram_man1 answered 4 years ago

You may have gotten a later model engine of 2002 because at some point they went from a 16 tooth to a 32 tooth on the crankshaft for the crank sensor and if you got the wrong crank tooth configuration then it will give the wrong signals to the computer which in turn will tell you you have a problem with the crank and cam sensor.

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