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XJ Ask the Question Thread
Junior Member
Join Date: Dec 2012
Location: Trinidad Tx
Posts: 72
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Year: 1989
Model: Cherokee
Engine: 4.0
Heeeelllllllllppp me!!!
so ive got an 89 xj limited...3 inch lift on 31s...200k miles...what the hell is causing me to get like 6mpg? i dont drive it hard...just doing 55-65 mph for about 30 miles and back home i burned up half a tank....
any ideas or suggestions on how or what to fix/change?
i love the hell outta my xj...and if i cant get the mpg fixed...ima have to trade it for something gas saving....eewww honda....
any ideas or suggestions on how or what to fix/change?
i love the hell outta my xj...and if i cant get the mpg fixed...ima have to trade it for something gas saving....eewww honda....
Banned
Join Date: Oct 2012
Location: USA
Posts: 1,744
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Year: 1998
Model: Cherokee
Engine: 4.0L i6
Why exactly do spark plug WIRES need to be replaced in a tune up? No other wires are ever replaced in a truck for 200k miles unless they fray. What's different? Has anyone gone 200k miles with a single set of spark plug wires?
CF Veteran
Join Date: Jul 2011
Location: JOCO
Posts: 4,521
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Year: 1999
Engine: 4.0 Inline 6
so ive got an 89 xj limited...3 inch lift on 31s...200k miles...what the hell is causing me to get like 6mpg? i dont drive it hard...just doing 55-65 mph for about 30 miles and back home i burned up half a tank....
any ideas or suggestions on how or what to fix/change?
i love the hell outta my xj...and if i cant get the mpg fixed...ima have to trade it for something gas saving....eewww honda....
any ideas or suggestions on how or what to fix/change?
i love the hell outta my xj...and if i cant get the mpg fixed...ima have to trade it for something gas saving....eewww honda....
CF Veteran
Join Date: Jul 2011
Location: JOCO
Posts: 4,521
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Year: 1999
Engine: 4.0 Inline 6
or how about i have no friggin clue and i totally bs'd that ^^...
Banned
Join Date: Oct 2012
Location: USA
Posts: 1,744
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Year: 1998
Model: Cherokee
Engine: 4.0L i6
so ive got an 89 xj limited...3 inch lift on 31s...200k miles...what the hell is causing me to get like 6mpg? i dont drive it hard...just doing 55-65 mph for about 30 miles and back home i burned up half a tank....
any ideas or suggestions on how or what to fix/change?
i love the hell outta my xj...and if i cant get the mpg fixed...ima have to trade it for something gas saving....eewww honda....
any ideas or suggestions on how or what to fix/change?
i love the hell outta my xj...and if i cant get the mpg fixed...ima have to trade it for something gas saving....eewww honda....
Correct tire air pressure**
O2 sensor**
Coolant temp sensor?
Cracked exhaust manifold
Huge tires?
General tune up? Plugs, wires, cap, rotor
Plugged Cat?
Clean throttle body
MAP Sensor
Fuel filter?
Seized hub bearings / u-joints?
Junior Member
Join Date: Dec 2012
Location: Trinidad Tx
Posts: 72
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Year: 1989
Model: Cherokee
Engine: 4.0
CF Veteran
Join Date: Jul 2011
Location: JOCO
Posts: 4,521
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Received 1 Like
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Year: 1999
Engine: 4.0 Inline 6
no. not hurt mileage. but if you were missing one from the intake mani then possibly.
CF Veteran
Join Date: Nov 2010
Location: Frisco, Tx
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Year: 1994
Model: Cherokee
Engine: 4.0
Lol. No. That would not cause that terrible mileage. Any other symptoms? Lack of power. Fuel leaks. Yada yada
Junior Member
Join Date: Dec 2012
Location: Trinidad Tx
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Year: 1989
Model: Cherokee
Engine: 4.0
not really sure how its supposed to drive....its acted like this since i traded my miata for it....bad gas mileage....but its supposed to get 20 highway...not 6....i can understand that with 31s i should get about 15 highway...but still not 6 lol
CF Veteran
Join Date: Nov 2010
Location: some small town oregon
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Year: 1989
Model: Cherokee
Engine: 4.0
When was the last tune up?
Junior Member
Join Date: Dec 2012
Location: Trinidad Tx
Posts: 72
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Year: 1989
Model: Cherokee
Engine: 4.0
i pulled the cap and rotor a couple weeks ago and cleaned it all up....(wasnt dirty at all) put new plugs in it 3 days ago...new cps...oil, filter, valve cover gasket....wrapped the crap outta the wires in electrical tape...cuz im broke....but yeah...not even the slightest improve in mpg...
CF Veteran
Join Date: Aug 2012
Location: ks
Posts: 1,539
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Year: 1998
Model: Cherokee
Engine: 4.0
Heres a question. Close up picture of the front of your jeep?
CF Veteran
Join Date: Apr 2011
Location: Carrollton, GA
Posts: 14,553
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Year: 1994
Model: Cherokee
Engine: Inline 6 4.0L High Output