Symptoms
Rough idle, stalling, hesitation, poor fuel economy or a check-engine light on a throttle-body-injected 318 or 360.
The fix, step by step
- On these trucks you can read stored trouble codes without a scan tool.
- Turn the key on and off three times, and the check-engine light flashes out the codes.
- Look them up in the service manual, then test the sensor the code points to before you buy parts.
- RamCharger Central owners say the TBI system is reliable if you replace its sensors at the proper intervals, but a truck that has been neglected for 20 years means a lot of time with a multimeter and the manual.
- Check for vacuum leaks first.
Tools & part numbers
- Multimeter
- factory service manual
- vacuum gauge
Where to buy the parts
MAP sensor, 1990 Ramcharger 5.2LRockAuto ↗Amazon ↗
Throttle position sensor, 1990 Ramcharger 5.2LRockAuto ↗Amazon ↗
Idle air control valve, 1990 Ramcharger 5.2LRockAuto ↗Amazon ↗
Oxygen sensor, 1990 Ramcharger 5.2LRockAuto ↗Amazon ↗
Hunting a used or discontinued part? Search eBay Motors for Dodge Ramcharger (1981–1993) parts →
Rated for a competent home mechanic with a decent tool kit. Confirm torque figures, fluids and procedures against the factory service manual for your VIN, support the truck on stands rather than a jack, and work at your own risk (disclaimer). Some parts links are affiliate links, which pay us a small commission at no cost to you.