I've got a '67 Mustang I just recently converted to EFI using a Fox harness. Here's a listing of the parts in it:
Victor EFI Intake
Trick flow Heads
Lunati Cam - 218/228 @ .050 w/ .536 lift
Long tube headers (O2 sensors in the collectors)
BBK TB (70mm)
Ford 30 lb/hr injectors
Pro-M 76mm TB calibrated for 30 lb injectors
Stock Distributor with MSD box, initial timing at 15 degrees.
A9P computer (car is manual however)
No EGR or Canister Purge
All of the electronics are brand-new with the exception of the mass-air meter and the computer.
Problem I'm having is the vacuum at idle is only 4" and if I rev the engine, the RPM will hang around 2000-3000 RPM and settle back down to idle after a few seconds. At 3000 RPM, it's pulling 20" of vacuum. I've sprayed brake cleaner at the lower manifold/head gasket, upper plenum gasket, TB gasket, solenoid gasket and the engine doesn't rev up like any are leaking.
Idle is fairly steady at 800 RPM (+/- 100 RPM), but if I let it idle for a while it'll gradually slow down and eventually try to die. Vacuum is steady the whole time, not jumping around at at.
Codes out of the computer are:
34, 67, 81, 82, 84, 85
I've got one of the EGR simulators, but I think it may be defective since it's spitting out 34 and 84...
I'm really at a loss guys, please help!!
Victor EFI Intake
Trick flow Heads
Lunati Cam - 218/228 @ .050 w/ .536 lift
Long tube headers (O2 sensors in the collectors)
BBK TB (70mm)
Ford 30 lb/hr injectors
Pro-M 76mm TB calibrated for 30 lb injectors
Stock Distributor with MSD box, initial timing at 15 degrees.
A9P computer (car is manual however)
No EGR or Canister Purge
All of the electronics are brand-new with the exception of the mass-air meter and the computer.
Problem I'm having is the vacuum at idle is only 4" and if I rev the engine, the RPM will hang around 2000-3000 RPM and settle back down to idle after a few seconds. At 3000 RPM, it's pulling 20" of vacuum. I've sprayed brake cleaner at the lower manifold/head gasket, upper plenum gasket, TB gasket, solenoid gasket and the engine doesn't rev up like any are leaking.
Idle is fairly steady at 800 RPM (+/- 100 RPM), but if I let it idle for a while it'll gradually slow down and eventually try to die. Vacuum is steady the whole time, not jumping around at at.
Codes out of the computer are:
34, 67, 81, 82, 84, 85
I've got one of the EGR simulators, but I think it may be defective since it's spitting out 34 and 84...
I'm really at a loss guys, please help!!
