View Full Version : erratic spark

10-18-2011, 10:22 PM
I put good used 2002 2.5 auto in my 2001 2.5 stick car after dropping a rod in my old motor. I saw the motor run in other car, now in my car and won't run. I swapped all electrical parts,sensors, and throttle body. It has a very random spark or some times none at in cylinders 3 & 4 . What am I missing here ?:confused:

10-19-2011, 01:45 AM
Did you swap the ECU also?

Did you re-check all of your electrical connections?

10-21-2011, 06:33 PM
Found the problem, cam gear on the new motor has 5 windows for the cam sensor and the old motor has 3. changed them out and it runs great.
Never thought the cam gears would be different.