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This is computer controlled
Timing is set by the PCM and is not adjustable.
Worn brake pads can cause the brake light to blink on the dash in a 1993 GMC Sierra 1500. This can also be caused by a faulty light.
you rotate the distrubuter with the use of a timing light. I suggest that you get the Clymer manual before you attempt this, as the timing being off can ruin your engine.
If your truck has the standard 5.7L V8, factory HP is 255.
2wd is 5 x 127mm and 4wd is 6 x 139.7mm
93-99
timing is off or firing order is off
Its the brown wire from the distributor, goes to the fuses/relays on your firewall. unhook that and you will have your base timing.
The timing is computer controlled, there is no adjustments. I know this is a little late, but timing could be off because the timing belt is not properly aligned. If the timing belt is installed incorrectly the timing will never be right.
From 88 to95 it was called the "TBI", throttle body induction.
How do you adjust timing chain on a 1990 sentra?