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#1
03-05-2005, 03:09 PM
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weird hesitation
i noticed over the past week that when i first start my car it runs perfect until the temp. gets to 100 degrees. after that my air/fuel guage bounces between rich and lean, and even disappears off the lean side. While the gauge bounces around the car feels like its missing here and there. does this sound like it could be 02 sensors or emisions related? it only does it after 100 degrees. thanks
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87 5.0 5 spd T-Tops - mass air conversion 9AL, msd distributer, coil, fms 9mm wires, bbk ceramic coated long tubes, bbk h pipe, 3" flowmaster catback, 190 lph fuel pump, 24 psi injectors, 70mm cobra meter, bbk AFPR, bbk fender kit with k&n filter, 12* base timing, flex fan, 3 row aluminum radiator, 6 piece headlight kit w/ clear corners, silver ponys, stormin normin cowl hood, saleen wing, and recently a new heater core 
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#2
03-06-2005, 09:40 PM
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Re: weird hesitation
any sugestions?
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87 5.0 5 spd T-Tops - mass air conversion 9AL, msd distributer, coil, fms 9mm wires, bbk ceramic coated long tubes, bbk h pipe, 3" flowmaster catback, 190 lph fuel pump, 24 psi injectors, 70mm cobra meter, bbk AFPR, bbk fender kit with k&n filter, 12* base timing, flex fan, 3 row aluminum radiator, 6 piece headlight kit w/ clear corners, silver ponys, stormin normin cowl hood, saleen wing, and recently a new heater core
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#5
03-10-2005, 03:53 PM
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Re: weird hesitation
i've tried fuel injector cleaner a couple of times already.
__________________
87 5.0 5 spd T-Tops - mass air conversion 9AL, msd distributer, coil, fms 9mm wires, bbk ceramic coated long tubes, bbk h pipe, 3" flowmaster catback, 190 lph fuel pump, 24 psi injectors, 70mm cobra meter, bbk AFPR, bbk fender kit with k&n filter, 12* base timing, flex fan, 3 row aluminum radiator, 6 piece headlight kit w/ clear corners, silver ponys, stormin normin cowl hood, saleen wing, and recently a new heater core
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#6
08-11-2005, 12:22 PM
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Re: weird hesitation
it hard to anwser a quetion with out knowing what year
i would not be good to run it if it gets that Lean!!!!!!
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#7
08-13-2005, 02:47 PM
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Re: weird hesitation
its a 1987 5.0 5 spd
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87 5.0 5 spd T-Tops - mass air conversion 9AL, msd distributer, coil, fms 9mm wires, bbk ceramic coated long tubes, bbk h pipe, 3" flowmaster catback, 190 lph fuel pump, 24 psi injectors, 70mm cobra meter, bbk AFPR, bbk fender kit with k&n filter, 12* base timing, flex fan, 3 row aluminum radiator, 6 piece headlight kit w/ clear corners, silver ponys, stormin normin cowl hood, saleen wing, and recently a new heater core
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#8
09-06-2005, 02:50 AM
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check for faulty coolant temperature sensor. the computer adjusts injector pulse width for lean/rich status of gas according to the temperature of the engine. when the engine is cold more gas is added to the air/fuel mixture (rich) to run and the computer leans the mixture out to a ratio of 14.7 air to 1 gas as the engine warms up. and running a code check isn't a bad idea if the mixture has been off for a while it can (a slight chance) lead to O2 sensor and cat problems.
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