What could be causing massive back fires in my throttle body when I try to start the car? The first time it happened, it blew my airbox open! They are violent explosions and the whole air intake and indeed inside the cam cover all stink of fresh fuel?
Any ideas? I am at a loss. I have just replaced the head gasket so the car has been in many pieces.
The HT leads are definitely on correctly.
I have just performed a compression test and got good readings. Surely this means that the valves are working and that the physical timing is correct?
That just leaves electric timing.
Does anyone have any other inputs or ideas?
Any advice or thoughts would be welcomed.