another fuel economy post, with a variation
#1
another fuel economy post, with a variation
I have a '97 4wd 2500 6.5 Suburban with 190,000 miles on it. I'm the 2nd owner, I've had it for 5 years and use it mostly to drive from the city (Atlanta) to the mountains (Mineral Bluff, GA) and to tow a small trailerable sailboat. I have an exhaust kit, a reprogrammed chip for fuel economy, injectors, and a turbo governor (maxetorq) all from Heath. When I first got the truck I took it to a local diesel place and asked them to give it a "once over" and they told me that the turbo would be far more effective with a working solenoid (!!). I thought they gave me compression figures on each cylinder but I can't locate them. I get a fair amount of blow by, using the old fashioned test of loosening the oil filler cap while the engine is running, it hops up 3 - 6".
I get about 10mpg no matter what I'm doing - towing, not towing, driving on the highway, driving in town. Based on results in other posts I feel like I should be getting more in the 15 - 19mpg area. I don't remember what my rear end gear ratio is, I can check the code sticker in the glove box. My mileage has been consistent through different tires too (I'm currently running Yoko Geolander ATs on a stock wheel, normal size).
How much of a difference does the injection pump make to fuel economy (I would imagine it could be a lot) and how would I be able to tell if it's time for a new or reman injection pump?
What should my cylinder compression generally be before I start thinking that it's time for a rebuilt motor?
I get about 10mpg no matter what I'm doing - towing, not towing, driving on the highway, driving in town. Based on results in other posts I feel like I should be getting more in the 15 - 19mpg area. I don't remember what my rear end gear ratio is, I can check the code sticker in the glove box. My mileage has been consistent through different tires too (I'm currently running Yoko Geolander ATs on a stock wheel, normal size).
How much of a difference does the injection pump make to fuel economy (I would imagine it could be a lot) and how would I be able to tell if it's time for a new or reman injection pump?
What should my cylinder compression generally be before I start thinking that it's time for a rebuilt motor?
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