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1991 Ford F-150 XL 4.9L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Stall, Misfire, Poor Fuel Economy
Posted to Ford Driveability on 9/20/2010 11 Replies

yes a 91 f150 is whipping my butt so try not to laugh. this thing runs aweful. it keeps fuel fouling the number three spark plug. compression test running and static. 150 psi. comes up with a code for the iat sensor grounded. i have unplugged everthing that sh...

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  Related Documents & Media  1991 Ford F-150 XL

 
Message Closed w/FIX

car Vehicle Data

1991 Ford F-150 XL

VIN 1FTDF15Y0M
Engine4.9 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
SymptomsExcessive Emissions, Poor Idle Quality, Hesitation, Surge, Stall, Misfire, Poor Fuel Economy
OccursAlways

Trouble Codes

112ECT indicated 250deg / circuit grounded
Message Closed w/FIX

car Vehicle Data

1991 Ford F-150 XL

VIN 1FTDF15Y0M
Engine4.9 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
SymptomsExcessive Emissions, Poor Idle Quality, Hesitation, Surge, Stall, Misfire, Poor Fuel Economy
OccursAlways

Trouble Codes

112ECT indicated 250deg / circuit grounded