Hi.
Symptoms:
1. Idle is rough on start-up (excessive vibes, feels like misfire) and lopes like a radical cam V8.
2. Idle fluctuates between ~750 and 1100 RPM until maybe 15 minutes of run time, at which it still feels a bit rough, but stabilizes.
3. Fault code 1221
4. Revs fall a bit too hard after applying clutch. Could use more damped drop off.
Actions taken / thoughts:
Air
Symptoms:
1. Idle is rough on start-up (excessive vibes, feels like misfire) and lopes like a radical cam V8.
2. Idle fluctuates between ~750 and 1100 RPM until maybe 15 minutes of run time, at which it still feels a bit rough, but stabilizes.
3. Fault code 1221
4. Revs fall a bit too hard after applying clutch. Could use more damped drop off.
Actions taken / thoughts:
Air
- Vacuum leak
- Addressed mess under intake
- Checked for leaks with starting fluid
- New intake gaskets
- ICV
- Replaced ICV
- Both ICV's pass ohmmeter test
- Air filter
- Air filter inspected
- MAF
- Swapped MAF
- Injectors
- Cleaned injectors
- New injector o-rings
- Test injector flow?
- Fuel filter
- Replaced fuel filter
- ECU
- Replaced Coolant temp sensor
- Fuel pump?
- Check fuel pressure
- O2 sensor?
- Plugs
- Went from Bosch Platinum to OEM NGK
- Coils
- Swapped Coil packs
- Wires
- Wires pass ohmmeter test
Comment