Greetings


I own a 99' gmc suburban, 5.7 vortec. 150K. I had the unfortunate experience of learning how cheap the factory intake manifold gaskets are. When it broke, coolant ran out faster than I could put it in. So, changed out the gasket. what a job.


I carefully marked the distributor for reinstallation and when I tried to start it, it cranked but no start. Thinking I did something wrong to the timing, I reset it and double checked the marking etc. As it turned out I also learned how cheap the spider injectors are as well. So I read up on it and upgraded the injectors as well. Turned over and started right up like new. Not throwing any codes, and runs fine.


My question is: Should I still have it scanned to get the timing spot on?

 

I'd wait an see...
Check your Fuel mileage, if lower than normal, then yes, get it set.

 

You could try the trial and error method. Just move the dist a couple of degrees at a time. If it seems to run right you must have it pretty close. I think you have 2 deg. either side of perfect before it sets the check engine light.