Engine stalls when in drive
The other day I had a backfire through the throttle body and FiTech hasn’t been right since. I have a 67 GTX w/ 440 and a 30003 Go Street EFI System. I hear a large hissing sound while idling. When I put car into gear I make it about 100ft before I loose complete engine power and vehicle stalls. I do have throttle response while idling. Car will idle all day. As soon as I put in in drive she doesn’t want to go very far.
the large hissing noise sounds like an iac problem or a blown gasket on the intake track. Billk
I had a backfire early on, blew the TB base gasket, so small had to do smoke test to find it, mucked everything up. had to restart over again.
Checked your vacuum connections? Check for vacuum plugs or removed hoses. The backfire pressure can easily blow these off and then screw up the Fitech readings.