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Discussion Starter #1
Hi

I visit this forum every week and always find useful information to improve or even fix the problems in my dart.

But today is not the day...

Few months ago I had a dart 13 2.0 and it was really good in gas consumption, sold that car and got second hand dart 2.4 2016 and now these one suck gas like v8... 14mpg .

Checked every fuse and every hose and lines... all good and no leeks.

Changed spark plugs to ngk lx lfr5aix-11

added cheap air intake

Did a full clean of throtle body and air sensor.

Reset all memory with alfaobd.

Relearm gas pedal sensor .

No CEL and im out of ideas to check what coul be wrong ... I hope anyone here had same problem and help me to fix it . Already tried to find info in here but didnt find anything related.

Sorry my english.... im not in usa

Thanks in advance
 

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Check for dragging brakes.
 

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O2 sensor? there isn't always an engine light for a failing sensor, usually it waits for it to fail completely. the upper O2 sensors is the one that regulates the fuel mileage.


I have also seen that when they become fouled. a fouled sensor would result in poor fuel economy without setting an engine light.
 

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Discussion Starter #5 (Edited)
thanks for reply

Im going to check and clean all the sensors and see if that helps.

**EDIT**

checked both front O2 sensors today and no problems with those... did some clean aswell but still sucking gas like v8

any ideas?
 
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DaMolesv
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