On my 1998 Chevy Cargo Van, I took off the fresh air hose for the filter box so it takes in warm engine compartment air instead of cooler fresh air (I measured approx. 82 f. incoming engine air on a 70 f day) . Ive ran two tanks of fuel thus far and each showed a 1.5 mpg increase. Im currently trying the same thing on my 2002 Hyundia SantaFe , 2.7 litre...and will report my findings after a couple of tank fillups. It appears that the engine computer adjusts the fuel mixture leaner when it senses warmer incoming air ; HyundiaTech : What are your thoughts on this ? thanks.
- posted
15 years ago