General characteristics
Fuel pressure:
- 3.1L Engine TBI Central Injection - 9-13 psi
- 3.8L engine, PFI port injection - 40-47 psi
Secondary air spool travel at idle (IAC valve) - 1 1/8 inches
Minimum idle speed - 550-650 rpm
Unregulated Throttle Position Sensor Output (TPS) - less than 1.25 V
Torques, Foot-lbs
TBI throttle body nuts - 18
PFI Throttle Body Bolts:
- Before 1990 - 11
- After 1991 - 18
Bolts of fastening of the case to an inlet manifold — 16