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1997 - 2003 Ford F150 General discussion on the Ford 1997 - 2003 F150 truck.

check engine light ???

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Old Jun 10, 2010 | 04:33 PM
  #1  
ArizonaTim's Avatar
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From: Wadsworth, Ohio
Default check engine light ???

OK, my light comes on when my fuel tank is a needles width below 1/4 of a tank of gas. it has done it twice now. both at the exact same spot.

I have done the gotts mod and the silencer mod. the code that comes up is both left and right banks running lean. normally I believe that this would be the MAF sensor. after the first time I completely cleaned it and the throttle body and the tubing. and it has happend again.

If I fill up before it gets to a 1/4 of a tank of fuel the light does not come on. The only other thing is that a while before I did the gotts mod and the silencer mod I had a check engine light for Secondary Emissions System which I was told by Autozone was usually the gas cap.

Soooooo, is all this problems still my gas cap or what else should I look for. the truck has 131K on it and I bought it with 120K so I'm not sure of the maintainence before that point. Any help would be appreciated!!
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Old Jun 11, 2010 | 02:16 AM
  #2  
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*bump* any thoughts guys??
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Old Jun 11, 2010 | 03:15 AM
  #3  
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From: Windsor,Ontario,Canada
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Clear the codes. Then if/when he light comes back on get the codes read and post the code numbers.

.
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