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Old 05-03-2007, 02:14 PM   #1
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Angry air fuel not mixing right

hey everybody whats up i have a 2000 mustang gt the engine block is from a 96 thunderbird 4.6 and the rest is still mustang, only difference is in the belt.it is bored 20 over has ported and polished heads cold air intake and a gorrila chip running through the ats sensor.sense this motor has been in it its run fine only the idle while in gear has been bumping from 600 to 400 rpm and in park from 1000 to 700.if your behind my car and smell the exhaust its smells like its mixing to rich any help would be very much appreciated


ps if i stop really fast it will die also if the wheels turned all the way sometimes



thanks
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Old 05-03-2007, 02:19 PM   #2
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Re: air fuel not mixing right

Sounds like you need to ditch the chip and get a tuner to get your tune right.
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Old 05-03-2007, 03:22 PM   #3
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Re: air fuel not mixing right

no it was doing that before i put the chip in
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Old 05-03-2007, 03:23 PM   #4
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Re: air fuel not mixing right

nice *** car by the way
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Old 05-03-2007, 03:39 PM   #5
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Re: air fuel not mixing right

sounds like the IAC to me. one of the biggest culprits in anything idle related is the IAC. take it off and clean it with some carb cleaner. might want to try spraying some electronic sensor cleaner (can be found at any autozone) into the maf to see if that helps any.

and yeah, time to get a real tune. wtf is a gorilla chip?
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Old 05-03-2007, 03:54 PM   #6
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Re: air fuel not mixing right

ok i know maf is mass air flow sensor where is the iac
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Old 05-03-2007, 03:57 PM   #7
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Re: air fuel not mixing right

by the way a gorilla chip is the cheap way to burn your chip you have no control over the settings it just curves your air fuel ratios and changes your shift points for an auto but your right it was definitely a waist of money it only puts out about 15 ponys id say but it was only 35$ so i didnt feel to ripped
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Old 05-03-2007, 04:47 PM   #8
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Re: air fuel not mixing right

oh.. it was one of those IAT resistors from ebay?
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Old 05-03-2007, 07:15 PM   #9
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Re: air fuel not mixing right

If you have a resistor in your IAC it is NOT a chip. Put it back like it was so you can gain gas millage and power back. Get a REAL chip.
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Old 05-03-2007, 09:00 PM   #10
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Re: air fuel not mixing right

yes it was a at resisitor from ebay air tempature sensor dont buy one they suck but that still doenst tell me what the hell a iac is is that the same thing
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Old 05-05-2007, 03:48 PM   #11
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Re: air fuel not mixing right

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Old 05-10-2007, 01:57 PM   #12
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Re: air fuel not mixing right

thanks to everyone that helped although the iac was a little dirty it turns out the intake was leaking and a passengerside rocker arm wasnt torqued down right lot worse than i thought
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