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

Gas Mileage

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Old 06-23-2016, 11:42 AM
  #1  
brayan
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Default Gas Mileage

Ok so im new to this i currently have a mustang 98gt cold air intake ,performace distributors and straight piped and i only get 170 miles a tank replcaed the fuel filter and pump recemtly what else can i do?
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Old 06-25-2016, 01:23 PM
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JC316
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Is it tuned for the mods? If not, that's likely your problem.
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Old 06-25-2016, 02:34 PM
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dawson1112
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wow I get close to 330 miles on a tank of gas with the AC blasting in my 2000 gt, that is if Im just highway cruising with out flooring it or driving it hard. Now if every where I go are short trips and I jump on the throttle every chance I get Id probly get less than 200 miles on a tank. It really makes alot of difference with these cars as to how you drive it.

Now if your not driving it hard and your just highway cruising with only 170 miles to a tank, I would suspect the MAF is dirty, or the ect is faulty. Get the computer read to see if the PCM has ever stored a lean or 02 code. 02 sensor failure will cause a dramatic drop in mpg.
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Old 06-25-2016, 03:29 PM
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brayan
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Originally Posted by dawson1112
wow I get close to 330 miles on a tank of gas with the AC blasting in my 2000 gt, that is if Im just highway cruising with out flooring it or driving it hard. Now if every where I go are short trips and I jump on the throttle every chance I get Id probly get less than 200 miles on a tank. It really makes alot of difference with these cars as to how you drive it.


Now if your not driving it hard and your just highway cruising with only 170 miles to a tank, I would suspect the MAF is dirty, or the ect is faulty. Get the computer read to see if the PCM has ever stored a lean or 02 code. 02 sensor failure will cause a dramatic drop in mpg.

ok i l had system to lean codes bank and bank 2 when i replaced fuel pump codes were gone
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Old 06-27-2016, 06:37 PM
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TomKat
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make sure to check that your not leaking any gas common issue is the filler neck gasket on gas tank in these mustangs.
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