Gas mileage BAD
#1
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Year: 1999
Model: Cherokee
Engine: 4.0
Gas mileage BAD
So I changed my exhaust manifold because it was cracked and now after i changed it my jeep gets worse mpg a very noticeable difference I already changed plugs wires dist cap and rotor coil. I am running out of ideas of what it could be it's 99 4.0 i6 87000 miles
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Year: 1999
Model: Cherokee
Engine: 4.0 I6
Originally Posted by widdy99
So I changed my exhaust manifold because it was cracked and now after i changed it my jeep gets worse mpg a very noticeable difference I already changed plugs wires dist cap and rotor coil. I am running out of ideas of what it could be it's 99 4.0 i6 87000 miles
#3
Wild-*** guess here, and somebody will surely tell me if I'm off base, but did you reset your ECM to factory defaults after putting the new manifold on? New O2 sensors, too?
#4
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Year: 1999
Model: Cherokee
Engine: 4.0
I already thought maybe I was punching it to much so I started driving like a old man buy that didn't help
No I didn't reset it don't you just unhook the battery for 15 min. I didn't change the o2 sensors how do I tell if they are bad?
No I didn't reset it don't you just unhook the battery for 15 min. I didn't change the o2 sensors how do I tell if they are bad?
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