2002 4.7 replaced with 2003 4.7 Troubles Help Please

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Moochy

Junior Member
Joined
Jul 1, 2017
Posts
1
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Ram Year
2002
Engine
4.7
Have a 2002 Ram 1500 with 4.7....Dropped a valve. Found a donor engine from a 2003 Ram 1500 with 4.7.
Installed but now backfiring and not running correct.
The crankshaft has different amount of teeth on the thing.
I do not know how to explain...but on the crank their is a toothed wheel...and the 2002...2003 are different.
If I put the 2003 Computer in it, from the donor truck...do you think it will solve the problem.... Thanks
 

fastf

Senior Member
Joined
Jul 8, 2017
Posts
590
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Location
Georgia
Ram Year
2005 Ram 1500 Quad Cab SLT Thunder road
Engine
4.7
I believe the domor computer may help it.
 

soonerb

Junior Member
Joined
Dec 28, 2016
Posts
15
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Ram Year
2002
Engine
4.7l
Donor is an NGC, oem was JTEC. Not interchangeable.

It is not a bolt on. Remove the crankshaft and change the data ring. Then change the cam data ring.
 
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