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dennis
Dodge Dakota
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12/15/2008
17:29:07

Subject: major loss of power
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whats up, if theirs anyone that can give me some info on this it would be great.


i have a 98 3.9. ive got everything that u could think off done to it.bored 0.30 over flat top forged pistons,aftermarket cam, springs, lifters, roller rockers. jba headers, msd ignition,coil and wires. 3923 plugs. everything, my problem is my truck boggs its way to 3000 rpms then slowly get a little quicker but deffenitly a major power loss somwere. i thought it was the tranny so i rebuilt it with performance parts. ( lost 2nd gear anyway) but it dident solve my first problem. so i think i should look at my timing, or my fuel pump....not shure but got lots of money into the truck dont want to be shooting in the dark and waisting more money....any suggestions?? thanks.



J and J Auto
GenII
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12/29/2008
22:50:53

RE: major loss of power
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Check the color on the spark plugs

black rich
tan perfict
white lean

o2 sensor or fuel 40 to 50 psi



Larry
J&J Auto

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