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Unread 03-29-2011, 03:17 AM   #16
Night Wolf
Registered User
2005 TJ Wrangler 
 
Join Date: Jul 2005
Location: Macon, Georgia
Posts: 945
Quote:
Originally Posted by neon22 View Post
Currently I have approximately 129,000 miles, and my gas mileage has decreased to around 10mpg even thou I shift at 1250rpm. I dont know the reason but mpg dramatically increased when I cleaned the throttle body and is now around 15mpg. Occuasionly the check engine light will come on, and I receive the codes P0159 P0153. I dont know if it is normal or not but, it at rpms above 2500 the engine sounds rough. For whatever reason, when it rains the engine smooths out. A buddy has a 97 TJ Sport and he says his does the same. Is this normal? If not I was thinking it might be the belt.
Please explain your logic on this...

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Unread 12-01-2013, 06:12 AM   #17
Chuck59
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2004 LJ Wrangler 
 
Join Date: Apr 2013
Location: West Central, IN
Posts: 18
I don't know but am just asking, does an 04 Wrangler have downstream O2 sensors? I thought downstream sensors on Wranglers began in 2005?

I agree with others on NO Bosh sensors. I have seen them go bad within weeks of install.
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Unread 12-01-2013, 07:42 AM   #18
bthompson
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2002 TJ Wrangler 
 
Join Date: Dec 2010
Location: 43.12279, -83.59194, Michigan
Posts: 55
Quote:
Originally Posted by Chuck59 View Post
I don't know but am just asking, does an 04 Wrangler have downstream O2 sensors? I thought downstream sensors on Wranglers began in 2005?
My 02 TJ has both upstream and downstream, so I'd expect that an 04 would as well.
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Unread 12-01-2013, 06:38 PM   #19
Knuckelhead
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2000 TJ Wrangler 
 
Join Date: Aug 2005
Location: Colorado
Posts: 14,956
All TJ's have upstream and downstream O2 sensors...
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bosch auto parts , fuel economy , oxygen sensor , repair
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