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

Low Idle

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Old 09-10-2006, 03:55 PM
  #1  
Adam03GT
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Default Low Idle

I have 40 series flows and i just got my midpipe install. After i installed my BBK o/r X i idle really low? Sometimes i idle at around 200-400 rpms? It didnt do this until after the midpipe? Its a steady idle, its just really low! Those are the only two mods i have.. Any ideas?
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Old 09-10-2006, 04:28 PM
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Poobs
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Default RE: Low Idle

Anybody mess with the O2 sensors ? Is your CEL light on ?
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Old 09-10-2006, 05:45 PM
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SNORX302
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Default RE: Low Idle

Check for leaks
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Old 09-10-2006, 06:59 PM
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Adam03GT
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Default RE: Low Idle

I was wondering about a leak..when i slowly accelerate i hear like a ticking? I was old its normal with the BBKs but how would i know if i have a leak?
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Old 09-10-2006, 09:40 PM
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Poobs
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Default RE: Low Idle

Dude you aren't giving enough info for anyone to help you .....[8D]

Ok, is your new pipe an off road one without cats ????

Did they have to remove your O2 sensors to install it ? ???

The ticking happens as the exaust warms up and is random or U mean a ticking like a valve or lifter????

If U mean an exaust leak because they worked on your exaust system, an exaust leak should not cause a low idle unless it is a major leak ahead of the O2 sensors and the leak is throwing off the O2 readings.

If the leak is real small U may not see /jear it very easily.

Aside from taking it back to where you had the work done U can take it to a a Midas or Meineke shop. I can't see them charging even an hour to find the leak.

U can have two people hold a rag or piece of wood over the exaust pipes with their feet while you listen for the hissing under the car - BE CAREFULL if U do this !!!

Also, the problem may be totally unrelated to the exaust install

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