Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
I am sorry your having this problem
off of idle or over 1000 rpm when driving the truck drives just fine ?
any access to a scan tool to see live computer data ?
at idle is there ANY noise from the front engine timing cover area ?
when the codes are clear how soon before the P1174 comes back and will it only come back at idle or driving at speed ?
and if you crack the throttle open when its doing this at idle it will smooth right out ?
usually these type of issues setting that code P1174 ends up being the timing chain with excessive play or a leaking fuel injector or a bad cat converter
to rule out the timing chain when you get your scanner will it show live current and history misfires in the data list ?