terrible gas mileage. HELP!!!!!
#12
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Working with GM as i do, i know we have alot of people with trucks who remove the screens..... it is a very expensive mistake. there is very little to gain from it. there is more to lose by doing it. I dunno when the last time you looked into a MAF for your truck... ORIGINAL LIST PRICE IS $240.83
GM PART # 25318411
My suggestion if you are looking for gains out of your MAF and taking the screen out has already been done.... get a granetelli motorsports MAF from what we have seen come through that is the best one with the least amount of problems weve seen come through our shop. and the gains are pretty amazing. im not guaranteeing anything, i just know that is the one from my experiance that has had the leasst problems.
GM PART # 25318411
My suggestion if you are looking for gains out of your MAF and taking the screen out has already been done.... get a granetelli motorsports MAF from what we have seen come through that is the best one with the least amount of problems weve seen come through our shop. and the gains are pretty amazing. im not guaranteeing anything, i just know that is the one from my experiance that has had the leasst problems.
#13
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you have no codes? usually such horrible mpg is a direct result of your o2's telling the pcm something that isn't true. pre-o2 exhaust leak? clogged cats? don't worry about the screen too much, if anything it should cause a lean scenario. I mean, you can put a stock maf back in (which i'd suggest), but i doubt the de-screening is causing such horrible gas mileage, maybe, but a loss of 9 to 10 mpg's? how is the power? nothing changed before you noticed the mpg probs? did all of a sudden it start getting sluggish and what not?
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Hey guys, Thanks for all the info. I am planning on getting a factory screen for my mass air. I did not notice any gains at all when i took it out. I don't have any codes and the truck runs ok(no bog or lack of power). I did not think that changing the tire size on the predator would do anything other than correct the speedo. What else will it change? I am willing to do anything to get a little more out of each tank of gas. If there are any more ideas or any more advice, i'm all ears. Thanks again...
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Thanks ls1 for the info. The truck only has 11,000 miles. It's still like new. I just changes the plugs recently,but i used ngk's. The intake is a mac cai with a new k&n that came oiled from the factory. I never adjusted the speedo because it is only off by a little(5 mph @55 mph). I work close to my house so i don't drive much at all. I can't really think of anything else other than a real tune might be what i need for better mileage.
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Originally Posted by dirtdiggler02
I did not think that changing the tire size on the predator would do anything other than correct the speedo. What else will it change?
If you have the onboard fuel gauge that tells you the average MPG, that will also be lower now because of this.
What size tire/rim did you have originally?
Also that large of a rim I'm sure is much heavier than the stockers were. When I had my 99' I lost about 2mpg just by going from a 265 tire to a 285. Mostly because the tire was a E load rating and the dam tire along weighed more than my stock tire/rim together.
#20
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Originally Posted by dirtdiggler02
Like the title says, my gas mileage is down to a measly 6.7 mpg. My 5.3 is internally stock but i have a mac intake, electric fans,Full length headers,no cats,mac mufflers,transgo hd2,2nd and 4th billetservos,tb stall,3.73 gears and a predator tuner. I also have 24's on the truck and i know that accounts for some of it,but this sucks for it to be that low. I have a 224 cam that i want to install,but i'm afraid that the mpg will get even worse. Will a decent tune help? Thanks for any help you guys can give.