General characteristics
Fuel pressure:
- 3.1L Engine, TBI Central Injection - 9-13 psi
- 3.8L Engine, Multiport Injection PFI - 40-47 PSI
Additional air valve stroke at idle speed (IAC valve) — 1 1/8 inches
Minimum idle speed - 550-650 rpm
Throttle Position Sensor (TPS) Unregulated Output Signal - Less than 1.25V
Tightening torques, foot-pounds
TBI Throttle Body Fastening Nuts - 18
PFI Throttle Body Mounting Bolts:
- Before 1990 - 11
- After 1991 - 18
Bolts for fastening the housing to the intake manifold - 16