Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
any access to a fuel pressure gauge ?
we need to see what the fuel pressure is reading key ON engine OFF when it will not fire up first
it should be 41 - 47 psi key ON engine OFF
also are there any codes being set at all ?
if the fuel pressure is reading within spec then you need to go after spark plugs or an ignition module issue
as with the puff of smoke would be a sign of un burned fuel
you can always get me back for FREE for any follow up any time with this question even after you rate me here at Justanswer
if you have any questions please ask as i do not get credit for my work until you rate me here at Justanswer
how are you making out ?