Lifted 1990 renix, horrible mileage.
#1
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Year: 1990
Model: Cherokee
Engine: 4.0
Lifted 1990 renix, horrible mileage.
Ok so to start off, I am a competent mechanic. I am a heavy equipment mechanic/ fabricator by trade. I have built everything on this cherokee my self. Well lets start, 4.88 gears, 35 inch mtr's and 8.5 mpg. It got better mileage before the regear. I have replaced everything under hood to no avail, new exhaust system to. I have checked for closed loop, and yes it is going into closed loop. So basically, at the half tank mark I have went 77 miles
I have checked my mileage to a t with gps. Wth gives. I could of built a late 60's bronco with a small block, and get better mileage, and have a/c.
I have checked my mileage to a t with gps. Wth gives. I could of built a late 60's bronco with a small block, and get better mileage, and have a/c.
#2
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Year: 1995
Model: Cherokee
Engine: 4.0
your driving a lifted box on 35in tires, and 4.88 gears, your gas mileage is pretty much where i would expect it to be. what kind of driving is it, is it city or highway/country roads?
#4
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Year: 1990
Model: Cherokee
Engine: 4.0
Mostly around town and to the trails. I was getting 16.8 with 3.55 gears, and 33's before I bumped up. I literally put 20 bucks in run a few errands and its gone. And it runs like a top. Passes ca emissions also. If this is the mileage I'm going to get, its time for a ls1. But it should do better than that. Atleast 12 around town I would hope.
#7
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Year: 1990
Model: Cherokee
Engine: 4.0
It is a auto. Ya the stroker was in with 3.55's and 33's. As a matter of fact i had 35's on for a few months before I regeared. It should do better than this. Its like driving a semi. Hell my 26000 pound mechanics truck does better. lol.
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#8
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Model: Cherokee
'eh that's what all of my Jeeps have gotten. I am suprised that mine is so bad. 35's with 4.56 gears. Wasted 35 bucks in gas in about 80 miles haha. My F-150 Supercrew gets almost double the MPG any of my Jeeps have got.
#9
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Year: 1990
Model: Cherokee
Engine: 4.0
what kind of injectors are in there? pools of gas in the runners? are they stuck open? fpr has vacuum? cat plugged? dunno. that really sucks with the mileage. does it feel like it has enough power compared to before the stroke? maybe its a transmission issue...
#10
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Year: 1993
Model: Cherokee
Engine: 4.0 ho 99 intake ps pump 1" tb spacer 62mm bored tb eletric fans and more
have you thought about the torque converter of transmission work?
#11
Chrysler gas gauges suck, I know mine jumps all over the place, fill it up all the way drive 100 miles then fill it back up so you know exactly how much gas you used
#12
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Year: 1988
Engine: 4.0 RENIX
you should be getting better than that. friend of mine has a very similar set up to yours, 35s, 4.88s, stroker, and a whole bunch of added weight from armor and such. setting the cruise at 70 he pulls around 14 mpg while fully loaded, which is better mpg than he got with the stock motor, 4.88s, and 33s.
my guess is something else is making you run rich. either that or your fuel gauge is off. when did you last replaced your oxygen sensor?
my guess is something else is making you run rich. either that or your fuel gauge is off. when did you last replaced your oxygen sensor?