Ok, can the snap-on modis tell you where number one cylinder is firing? Meaning at what degree before or after top dead center(TDC).
If not bring no. 1 cyl. Up to top dead center on the compression stroke. Take the dis. Cap off. Notice where the rotor is pointing. There is a 6 and 8 stamped on the base of the distributer LOOK CLOSE.
The rotor should be pointing to the 6. The 8 is for an 8 cylinder.
This will get you close but you still have to take the truck to someone who can check the timing with a scan tool. The timing is very sensitive with these trucks and must be set by a scan tool to within + or - 2 degrees. A timing light will not work because the computer automaticly advances the timing'
Also if you change the crank position sensor you must do a crank relearn procedure--not sure if the snap-on modis does this either. Let me know how you make out.
Friday, November 16th, 2007 AT 8:47 PM