98 Jimmy tune-up and timing
Question:
You CAN NOT adjust timing on the Jimmy….it is computer controled. I learned about that in an auto tech class I took last year. Mitchell Manual for the 98 4.3 Vortec V6 states that the timing is NON-ADJUSTABLE just letting you know I have a 98 Sonoma 4×4 4.3 Vortec, thats how I know 
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Response:
> You CAN NOT adjust timing on the Jimmy….it is computer controled. > Jason
Look around online, odds are theres a computer chip or a hackers fix to allow you to change timing by swiching chips or fiddling with a soldering iron… rhys
Response:
All, I want to tune-up my 98 Jimmy myself. 75K miles. I’ve read everyones input on Delco vs Bosch plugs, buying a good cap, and buying good wires. I will of course try to buy the best out of all of the suggestions. My question is that nobody has mentioned the timing. I know the timing light and manual adjustments are a thing of the past. Do I need to have a computer check andor change my settings after a parts tune-up? If so I need suggestions. GMC wants $165 for plugs and I’m guessing timing. Thanks in advance, Rick Bellagio Hotel and Casino
