NorthernTahoe
Newbie
1999 Tahoe 350 vortec.
Has been sitting a week or two. Doesn't start. Gas smell is coming from exhaust, so it's an ignition problem. When it's turning, scanning software shows constant 0 degrees of spark advance.
Last time the truck was started after some sitting, it had occasional stumbling on light acceleration, but it went away pretty fast, after which it started and run normally.
I think it might have had occasional kind of hard starts every now and then.
What's your first guess?
Thanks for any help!
Has been sitting a week or two. Doesn't start. Gas smell is coming from exhaust, so it's an ignition problem. When it's turning, scanning software shows constant 0 degrees of spark advance.
Last time the truck was started after some sitting, it had occasional stumbling on light acceleration, but it went away pretty fast, after which it started and run normally.
I think it might have had occasional kind of hard starts every now and then.
What's your first guess?
Thanks for any help!