99 V-10 rough running no codes
THe moter we installed is an 01 and we swapped the intake, exhaust, and wiring harness.
The problem cam when we went to start the rig. It took several tries to get it to start, but it started....success
Now the problem is it runs very rough and is not throwing any codes, or at least the check engine light is not coming on.
Any ideas as where to start???
please help and thanks



