Runs Rough During Deceleration/Backfire
F2-61flowchartF2 section = 1.8L K8-ZE V6 engine.
Troubleshooting Guide
Runs Rough During Deceleration/Backfire (STEP 6–10)
1
STEP 6: Is fuel cut operation OK? (page F2-131)
No
Try a known good ECM and check if condition improves (page F2-141)
Yes
2
STEP 7: Is volume air flow sensor OK? (page F2-150) I. Does measuring core move smoothly? II. Check resistance
No
Repair or replace volume air flow sensor
Yes
3
STEP 8: Check continuity between throttle position sensor terminals C and D (page F2-150)
No
Adjust throttle position sensor (page F2-151)
Yes
4
STEP 9: Check fuel injector for fuel leakage (page F2-117)
Yes
Replace fuel injector
No
5
Go to next step
6
STEP 10: Try a known good ECM and check if condition improves (page F2-141)
Volume air flow sensor resistance (Step 7 II)
E2 ↔ VS
Closed throttle position Resistance (Ω)200–1000
Wide open throttle Resistance (Ω)20–800
E2 ↔ VC
Closed throttle position Resistance (Ω)200–400
Wide open throttle Resistance (Ω)200–400