Sure fire way to make your tank of gas last longer....drive your jeep less often.
FOR SALE: 2003 Jeep Wrangler X. 4.0L I6 with 38k original miles, Auto trans, 4" suspension 1" body lift, 35x12.50r15 BF Goodrich KM2's. Hard Top, Full Doors, fullsize spare tons more to list.
I have just recently found that having equal tire pressure in all 4, correct wheel alignment and correct rear drive shaft angle shot me up from 14.2 mpg on average of 18.7 mpg (city + highway).
I had a some what noticeable vibes with a budget lift and an at home alignment until recently, where I put in new coils,shocks and lowered my transfer case to correct my drive line... then I caved in and had a shop set my toe-in to 13 or basically between 0 and 1/8" toe-in.
The entire driving experience was very noticeable and it was apparent that I had bad drive line conditions and alignment that was causing my engine to work a little harder than it should have been :-)
Do these throttle body spacers work as advertised by claiming 1-4 miles additional per gallon, which are also reviewed on these major 4x4 sites...?
Ordered one at Advanced, not sure if I will follow through....
Please advise fellow enthusiasts.
No, absolutely not. They do nothing when under the air-only type of throttle body modern Jeeps come with. Spacers can help when installed under carburetors and the older no-longer used throttle body injection (TBI) throttle bodies but a spacer will do absolutely nothing when under the TJ's type of throttle body.
Don't bother picking up the spacer when it comes in. If you already paid for it, cancel the order so you don't waste your $$$. Really.