Won't rev past 3k rpm?
 

98 5.9 gas, all stock expect for headers, only 150 miles on rebuilt motor.

So its been doing this ever since i put the motor in. It was running rough, and drinking ALOT of gas. and at first i just thought it was a timing issue. The timing was fine, so i found out it had a bad injector. Now it idles and runs just fine, but still seems kinda low on torque and will not rev past 3k rpm.

No cels or anything either, what the hell!

Is the dizzy installed in the correct orientation, and has the fuel sync been set with a capable scanner? And is the exhaust hooked up ? Cat clogged? O2's replaced?

Check the throttle cable and linkages?

What do you mean in the correct orientation? and fuel sync?

And the exhaust is hooked up and the cats and o2s were fine before swap

"What do you mean in the correct orientation? and fuel sync?" That answers part of the issue. http://www.bionicdodge.com/Download/...uel%20Sync.pdf

The oil drive gear was set right when i put the motor together, i just didnt know that was the term for it haha.

But the motor idles and revs fine all the up to 3k, then i just stays there and wont rev any higher

So was the fuel sync set? (with a scanner)

And how do you know the cats and o2's were fine?

No it was not, i just dont understand how it can run perfectly fine.

And before the motor was rebuilt there were no CELs and it didnt have this problem

Then check your work. What happens at 3K RPM? Does it start sputtering and popping?

Have the fuel sync set. No point in going any further if you don't ,as far as I'm concerned. Not to mention if the plenum was blown before the rebuild and you are using the same cat(s) and o2's without checking them, there is no way to at least eliminate that as a problem.