ChevPasmore
Newbie
Hello,
I have a 1990 GMC with a swapped in 95 5.7.
Using factory harness from the 1990 and accessories.
I have replaced distributor, cap, rotor, ignition coil plus brand new timing chain as of 1 week ago.
The timing still randomly drops and I have to reset it every time. Could this be caused from a faulty knock sensor or IAC?
When she runs, she runs good. But if I drive it for a bit, then shut it off and go to it say 3 hours later, it has a rough idle, and wants to die and I have to advance the distributor to keep it running then re-time it.
Yes I know to get it up to temp, then to disconnect the timing advance and set it then plug it back in after I shut the vehicle off.
No known vac leaks that I can find, throttle body is firing nicely. RPM's do not drop at all when engine warms up which leads me to believe the IAC is faulty.
Any insight would be great.
Thanks,
Chev.
I have a 1990 GMC with a swapped in 95 5.7.
Using factory harness from the 1990 and accessories.
I have replaced distributor, cap, rotor, ignition coil plus brand new timing chain as of 1 week ago.
The timing still randomly drops and I have to reset it every time. Could this be caused from a faulty knock sensor or IAC?
When she runs, she runs good. But if I drive it for a bit, then shut it off and go to it say 3 hours later, it has a rough idle, and wants to die and I have to advance the distributor to keep it running then re-time it.
Yes I know to get it up to temp, then to disconnect the timing advance and set it then plug it back in after I shut the vehicle off.
No known vac leaks that I can find, throttle body is firing nicely. RPM's do not drop at all when engine warms up which leads me to believe the IAC is faulty.
Any insight would be great.
Thanks,
Chev.