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

check engine light cause?

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Old 08-08-2005, 11:44 PM
  #11  
ajspellm
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Default RE: check engine light cause?

my car has been running a little hot. it has been just past the halfway
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Old 08-09-2005, 08:49 AM
  #12  
Jglisson
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Default RE: check engine light cause?

If it is consistently running a little warmer then usual, then that could definitely point to an emissions issue. Once again, find a scanner and get a reading and see what you find.
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Old 08-09-2005, 09:56 AM
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ORIGINAL: PipsBlackStang

I would say O2 sensor. Advance Auto has a handheld OBDII scanner for like $100 or somewhere around there. I bought one about a year back and it'll pays for itself in just not having to pay someone to look at it. 96 is the first year of OBDII so make sure you get a II. It will come in handy and its always nice to have because even if your car is running fine you may have a friend with a check engine light on and you can give them a free scan and then do the work for them and make some cash.
That's the first thing I was going to comment on.

Drives fine - bad gas mileage - CEL; all lead first and foremost to the O2 sensor.
 
Old 08-09-2005, 10:23 PM
  #14  
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well i finally went to get my codes read and as i was on my way the check engine light went on again. i got the codes and the problem is a evap emission control system control valve malfunction.(p1443) i also had a code (p1270) engine rpm vehichle speed limiter which was caused by the first code. i asked auto zone and advanced auto parts what i need to fix it and neither of them had the parts or knew what to do. they said to go to ford and get the parts. so i am going to call a ford dealership tomorrow and get the parts. what all will i need? thanks for all the help finding the problem
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Old 08-09-2005, 10:25 PM
  #15  
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Default RE: check engine light cause?

also my dad put ethanol fuel threw my car when we were test driving it. could this be a factor in all of this happening?
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Old 08-10-2005, 12:08 AM
  #16  
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Default RE: check engine light cause?

Yes it could factor.

Evap is the problem! Wow, I was right.

Go to Ford and ask about the part that I mentioned before: Delta pressure switch. Better yet, ask to speak to the drivability tech or one that specializes in emissions. He should know the part number. There was actually a TSB on certain years.

49k miles is a bit soon for an O2 sensor, not saying it doesn't happen, but that is a bit early. The EVAP problem is common.
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Old 08-10-2005, 12:35 AM
  #17  
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whats a tsb?
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Old 08-10-2005, 12:52 AM
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Technical Service Bulletin
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Old 08-10-2005, 01:06 AM
  #19  
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Default RE: check engine light cause?

are the switces hard to install?
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