4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

having a problem

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Old Jan 6, 2009 | 11:41 PM
  #1  
vortech01vert's Avatar
vortech01vert
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Default having a problem

ok so when i had my kenne bell on it started acting really weird like it had a miss up top and then one day it started idling very badly like it had a huge cam.i checked the plugs and they were fine,so i took it off and turned it back to stock. well now when i start it it will start but just die. it wasnt smoking, ticking or knocking when it was acting bad so i didnt think it was anything major but now im begining to wonder if it is. whats weird is if i take the air filter off and put my hand over the maf the car will idle but as soon as i remove my hand it will die. anybody have a clue what the hell is wrong?
Old Jan 7, 2009 | 12:42 AM
  #2  
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Throwing some ideas out there, did you go with a larger maf when you were f/i? Is it tuned for a larger maf? is the stock maf there? or is it still aftermarket if you did go aftermarket?
Old Jan 7, 2009 | 11:58 AM
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i had a larger maf but i put the stock maf and injectors back on. and i took the chip out so it turned the computer back to stock

Last edited by vortech01vert; Jan 7, 2009 at 12:03 PM.
Old Jan 7, 2009 | 12:30 PM
  #4  
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did it have an aftermarket tune other than the chip? you were running a supercharged engine on an otherwise stock tune? could have been ur KB problem.
Old Jan 7, 2009 | 01:20 PM
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Hows your oil and coolant look?
Old Jan 7, 2009 | 01:31 PM
  #6  
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it was a chip inserted into the computer that was tuned for the kb, the oil and coolant look fine. i really wanna get it running cause a guy wants to buy it but not until its running.
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