× 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
1991 Ford Mustang LX 2.3L Hesitation, MIL Lamp on, Loss of power
Posted to Ford Driveability on 4/19/2011 9 Replies

I performed pinpoint test H (fuel control) per shop manual on [...] and the results indicate the ECM is the culprit. I am very reluctant to replace an ECM unless I am 100% certain that will fix the problem. After driving on the freeway at 60 mph for about 5 mi...

9 Replies Received (View Replies)

  Related Documents & Media  1991 Ford Mustang LX

 
Message Closed w/FIX

car Vehicle Data

1991 Ford Mustang LX

VIN 1FACP40M8M
Engine2.3 L / 4 cyl / GAS
Trans5-speed Standard
DeliveryFuel Injection / EFI
EmissionsOBDI
SymptomsHesitation, MIL Lamp on, Loss of Power
OccursHot, Cruise

Trouble Codes

172O2 lack of switching lean
Message Closed w/FIX

car Vehicle Data

1991 Ford Mustang LX

VIN 1FACP40M8M
Engine2.3 L / 4 cyl / GAS
Trans5-speed Standard
DeliveryFuel Injection / EFI
EmissionsOBDI
SymptomsHesitation, MIL Lamp on, Loss of Power
OccursHot, Cruise

Trouble Codes

172O2 lack of switching lean