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

Engine Problems

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Old 04-20-2005, 12:08 AM
  #1  
01roushnj
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Default Engine Problems

Ok now I have faced RPM problems before and it usually just took a good cleaning of the MAF, TB, and IAC but this time its different. First, the car wouldn't stay idle for more than 5 sec before dying on me. I finally got it to start and tried reving the engine so see if the RPMs would stay up. When i pressed the gas pedal all the way down it stayed at 750RPMs which is incredibly low. I then noticed there was black smoke comming out of the exhaust. I popped the hood and unplugged the MAF sensor just to try it out. The result was rough idling between 500-1500 RPMs. In other words the car is undrivable. Anyone have any clue whats the prob??? Im guessing i need a new IAC valve and MAF sensor. Your comments are greatly appreciated.
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Old 04-20-2005, 12:52 AM
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The02GT
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Default RE: Engine Problems

uhhh, sounds like timing is WAY WAY off for some reason, did you just have it worked on somewhere?? What yr is it, did you cross plug wires??
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