On3 Fox Hard starting and stall - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 2 Old 02-23-2016, 10:40 PM Thread Starter
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On3 Fox Hard starting and stall

Hey Guys I just put a on3 70mm kit on my car(1989 fox) So the car starts and Runs Parked perfectly Idles Great. So here my Problem

1.starting the car in [coldstart] then start to drive the car for about 5 min and come to a Rolling stop the Car will stall out. Then I'll try to start it but it only cranks? Then I floored the gas and crank it and it starts but starts to Miss and won't rev up at all even if the pedal is Floored.

2.If I start the car [cold start] It will run forever..but when I turn the car off it won't start up unless I Floor it and after it starts I have to keep it floored so the car will stay on But has a misfire and won't rev up at all.

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post #2 of 2 Old 03-01-2016, 12:27 PM
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Sounds like it could be a bad coolant temp sensor. If you floor the gas pedal while cranking, the ECU turns off the injectors and that's why it fires with a bad coolant temp sensor. The ECU is flooding the cylinder in hot start because of a bad sensor or broken sensor wiring.


Keith Munroe "GDDYUP2"
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see, Ian drives it like Satan is chasing him downtrack. If you want to run the number, you gotta put the life of your parts on the line.
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