Brad's Car Manuals
: A 3rd party mirror of CHARM + LEMON car manuals
Home
>>
GMC
>>
1998
>>
C3500 HD 7.4 J, Automatic
>>
Repair and Diagnosis
>>
Engine Performance
>>
Engine Performance System Adjustments - 7.4L
>>
Ignition Timing
>>
Notes
Ignition Timing: Notes
Download the full database via torrent (~1.1 TB)
|
Download Brad's custom LEMON patches
NOTE:
Ignition timing is controlled by control module and is not adjustable.