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mass air conversion kit, idle problems

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Old Jul 7, 2007 | 04:35 PM
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mass air conversion kit, idle problems

I have a 1990 bronco w/ a 351w. I just put on a mass air conversion kit and the truck starts and runs rough. It smooths out at higher RPM. could it be that I have a lower intake gasket leak or a idle air bypass problem? ohh ya it will smooth out for a minute after it warms up and runs at like 800rpm's but then after a minute the idle drops and it idles like crap again.. ahhhhh please help..
 
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Old Jul 9, 2007 | 08:36 AM
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pull codes, what computer are you using. what kinda mass air kit did you get. is the o2 sensor hooked up? injector firing order setup for the 5.8?
 
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Old Jul 9, 2007 | 10:17 AM
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I have not had a chance to pull the codes yet, but the kit is from total performance, it has a overlay harness and reprogramed eec-IV mustang computer. All the sensors are hooked up to the original wiring harness and the overlay harness is connected to that and the computer.
 
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Old Jul 9, 2007 | 10:40 AM
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did you remove the vacum line going to your map sensor? pulling codes should be your next step
 
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Old Jul 9, 2007 | 07:41 PM
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ya I removed the MAP sensor vacume line, I'll pull the codes a see what comes up...
 
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