× 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
1988 Ford Mustang GT 5.0L Failed Smog
Posted to Ford Driveability on 4/22/2010 19 Replies

This car failed smog due to high Nox. Two years previous it passed with Nox numbers 295ppm@15mph and 320 ppm @ 25 mph. Not finding any fault with the engine or EGR we replaced all four converters. Nox Numbers are now 871 ppm @15 mph and 1235 ppm @25mph. Owner ...

19 Replies Received (View Replies)

  Related Documents & Media  1988 Ford Mustang GT

 
Message Closed w/FIX

car Vehicle Data

1988 Ford Mustang GT

VIN 1FABP45E7J
Engine5.0 L / 8 cyl / GAS
Trans4-speed Automatic
DeliveryFuel Injection / Port Fuel
EmissionsCalif Emissions
SymptomsFailed Smog
OccursAlways
Misc.Convertible
Message Closed w/FIX

car Vehicle Data

1988 Ford Mustang GT

VIN 1FABP45E7J
Engine5.0 L / 8 cyl / GAS
Trans4-speed Automatic
DeliveryFuel Injection / Port Fuel
EmissionsCalif Emissions
SymptomsFailed Smog
OccursAlways
Misc.Convertible