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#1
07-13-2004, 10:00 AM
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low gas mileage
The gas mileage on my 99 Trooper is way down. I drive about 60 mi round trip to work 4 days a week on an interstate so mileage should be at the Trooper's best - not that great but not bad either - 19 mpg. It's down to 12 or 13 mpg. What can be the problem? ERG valve has been cleaned, some gaskets were replaced, no change. Any suggestions? I like my car but this is a really high cost drive these days.
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#2
07-27-2005, 08:50 AM
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Re: low gas mileage
Perhaps your O2 sensors are going bad? I also just read another post from somebody that replaced their cats and their mileage went back up. My 99 is getting 15.5 right now w/ AC running. Seems a little low, but after reading about other troopers getting in the low 20's, I'm considering replacing the cats also.
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#3
07-27-2005, 09:47 AM
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Re: low gas mileage
Also a leaky intake manifold gasket is also a common cause.
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-Ryan Isuzu Moderator Car Show Tips Operations manager with a results-driven passion for process improvement FAQ 98-04 Isuzu Rodeo, Rodeo Sport, Amigo, Trooper SOLD - NOV2015 - 2000 Amigo, V6, HT winter, ST summer, 2wd
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