× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
1996 Ford Aerostar 4.0L Misfire
Posted to Ford Driveability on 8/11/2009 3 Replies

This car missfires under load, i tried adding propane but not much change. I have good spark to the plug, I will try a injector flow test, my first thought was a valve issue.

No vacuum leaks found and fuel trim looks good.

3 Replies Received (View Replies)

  Related Documents & Media  1996 Ford Aerostar

 
Message Closed w/FIX

car Vehicle Data

1996 Ford Aerostar

VIN 1FTW16TSTS
Engine4.0 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMisfire
OccursUnder Load

Trouble Codes

P0133Heated Oxygen Sensor (Bank 1 Sensor 1) Slow Response
P0303Cylinder 3 Misfire Detected
Message Closed w/FIX

car Vehicle Data

1996 Ford Aerostar

VIN 1FTW16TSTS
Engine4.0 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMisfire
OccursUnder Load

Trouble Codes

P0133Heated Oxygen Sensor (Bank 1 Sensor 1) Slow Response
P0303Cylinder 3 Misfire Detected