Thursday, January 19, 2012

How could I improve the gas mileage on a 1999 Cherokee?

I have a 1999 jeep cherokee 4.0 inline 6 4x4 auto. What modifications could i make to improve the gas mileage?How could I improve the gas mileage on a 1999 Cherokee?
Well theres actually a few things you can do, first of all one of the best ways is to make way with the clutch fan with that of an electric fan.



Clean out the throttle body, Idles Control Valve, new filter, New distributor cap, The throttle tends to get alot of blowby oil and can cause poor airflow on the ICV whitch is bolted with 2 torx on I believe 96-01 cherokees and possibly older,



Getting a less restrictive air filter such as a K%26amp;N seems to help quite a bit.



All and all the the increase should be as follows



Electric Fan Conversion 5-10%

ICV valve clean 1-3%

More free Flowing Filter 3-5%

New Rotor Cap 2-3%



Overall its reasonable to expect a 2-4 MPG increase from all these procedures adding more power and torque to the equasion, Other then that its a jeep bud the 4.0 are what they are with not alot of aftermarket support in the performance category making price to performance gains pretty unreasonable.
get it converted to run on vegetable oil.How could I improve the gas mileage on a 1999 Cherokee?
Smaller tires and less weight Joe-cooleo.
None... yer best bet is to sell it and buy a 4 cyl.How could I improve the gas mileage on a 1999 Cherokee?
change the air filter, drive slower, use cruse control on highway
lol
My 1999 Cherokee get over 20 mpg. Low cost and free ways to get better mileage are to use a low restriction air filter, open the spark plug gap up to .055, and run the stock size tire 225/75-15.



Remove any air flow disruptions like roof racks and aftermarket bumpers. Make sure the factory air dam in in place and straight. Also make sure the factory cover over the bottom of the engine is in place as it helps smooth the air flow under the Jeep.



For more tips see this article: http://www.mikestrawbridge.com/XJMPG.sht鈥?/a>



Mike



http://www.mikestrawbridge.com/jeep-cher鈥?/a>

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