littleblazer
Member
- Jul 6, 2014
- 9,265
Yup... But no matter how heavy my foot is, i shouldnt be burning more gas than a Hummer... And since this last refill, at least half of my driving WAS/IS hwy...gmcman said:Also, I believe you told me that you have a heavy foot. If that's the case, jack rabbit starts will surely kill mileage.
Driving like Im balancing wine glasses I get 14 to 16 in the city.
Not true, ask me how I know [emoji17], I'm in the single digits too, getting 8mpg with not that heavy throttle. but get the best of 10mpg with a Lightfoot and smart driving, *not driving ms.daisy kind-of driving* I don't think I can ever drive that slow[emoji3] and remember it's smiles per gallon not miles per gallon lolpcharm129 said:Yup... But no matter how heavy my foot is, i shouldnt be burning more gas than a Hummer...
Ohhh its True. You're just in the same leaky ship as i am! Welcome to the Titanic! Lol!Gerbil21 said:Not true, ask me how I know [emoji17], I'm in the single digits too, getting 8mpg with not that heavy throttle. but get the best of 10mpg with a Lightfoot and smart driving, *not driving ms.daisy kind-of driving* I don't think I can ever drive that slow[emoji3] and remember it's smiles per gallon not miles per gallon lol
Except this titanic doesn't sink since it runs out of gas before anything happens lolpcharm129 said:Ohhh its True. You're just in the same leaky ship as i am! Welcome to the Titanic! Lol!
It could get dirty and react slow like a o2 but still be in the pcms threshold of OK while actually hurting performance, you could always clean it with the correct maf cleaner or contact cleaner aka electronic cleaner.pcharm129 said:I was just thinking. The sensor on the air intake, i think the MAF sensor, could it go bad without the PCM throwing a code?
Its got 148,718 miles on it. Everything else is in my profile.Gerbil21 said:So everyone can be up to date can you make a list of your truck specs "miles, year, rear end ratio tire size, etc..." and work done
Can't see on tapatalk, I'll look laterpcharm129 said:Its got 148,718 miles on it. Everything else is in my profile.
He's got 3.43s and his tire size is about the stock 29.5 iirc.Gerbil21 said:Can't see on tapatalk, I'll look later
Yeah. Dry, not wet. Compression is awsome. I believe 185 to 190...gmcman said:Sorry if I didn't look back through the posts, but have you had a compression test done? Dry then wet?
No worries. Yes they do have different connectors. But i changed the last ones so im familiar. However, I DID try to change the downstream sensor WITHOUT jacking the truck up...BIGGGG mistake. Took me 4ever! Small work space... But its done. Now lets see if anything changes.gmcman said:I don't know if internally the sensors are different but they are different part numbers just make sure you get the upstream in the correct location. may even be a different harness I can't remember but just something to consider
Yes. No its not gutted.gmcman said:Do you have a catalytic converter? If so, has it been gutted? Just curious....that's a real sooty looking sensor especially being downstream. Maybe it's normal but I don't remember mine looking like that.
Has this been covered yet?pcharm129 said:Hello gentleman. I'm having a seriously confusing and costly problem with my truck, and NOBODY seems to be able to figure out what's going on. I have a 25gal tank and for some unexplainable reason i'm only getting 160 miles on it. Basically 6mpg! AND i don't have any codes! I have a pcm4less tune and i removed the resonator. Got a straight pipe from the muffler. My exhaust drips water and my mechanic is no help. It also stalls from time to time. I've addressed everything i can think of except a faulty pcm. Which i will address soon because i have another one i bought from pcm4less some time ago. I don't think anyone knows these trucks better than you guys on this forum. If you can help me solve this mystery i would GREATLY appreciate it...Thanks
I know this is a while back in the thread, but I've got to say with that short a trip combined with using different pumps to refill, you can't trust those numbers, you would have been better off to fill up, drive there and back and refill at the SAME EXACT pump, I drive about 160-180 (till the needle is around the half mark on the gauge) before I refill and at the same station if I fill up at pump #1 and drive (my typical 160-180) then refill at pump #2 (backside of pump #1) I get around 13.8 MPG then if I reverse that and after filling up at pump #2 then refueling on pump #1 I get 15.8 MPG but if I stick to pump 1 or 2 for several refills I get 14.8 MPG (the average of the alternating fill ups) everytime, so even spread across 160-180 miles of driving the variations between how full each of those pumps gets the tank before the pump cuts off can cause a multi MPG difference in calculations, so I could guess how much that throws off things on short drives like that.pcharm129 said:Update time... Went to see littleblazer today.
Filled up before leaving, drove 46 miles, topped off on arrival. Burned 4.6 gallons (AC off). Littleblazer calculated about 9.8mpg (hwy).
Littleblazer checked the vacuum pressure and said its good. Checked the manifold and tightened a loose bolt. No other issues were noticeable. We are now both suspecting PCM or Injector issues...
I drove 40 miles on the return trip and topped off again. Burned 3.127 gallons. I calculated 12.8mpg (no AC, about 85% hwy). Improvement, but still far from good.
Around 2000 RPM @ 75MPH...
Confirmed. RPM jumped a few hundred when done at 75MPH...
@littleblazer...Thanx for the help homie! I really appreciate you taking the time out to look at the truck...
And thank you EVERYBODY here on this thread trying to help me thru this headache...!!!
You realize that pump 1 and 2 at the same station (and as far as that matters 3 through 8 or however many are there) are both fed by the same tank of gas going through the same filter for each grade right? Nothing fancy there, it's not the gas in your case bud.Daniel644 said:I know this is a while back in the thread, but I've got to say with that short a trip combined with using different pumps to refill, you can't trust those numbers, you would have been better off to fill up, drive there and back and refill at the SAME EXACT pump, I drive about 160-180 (till the needle is around the half mark on the gauge) before I refill and at the same station if I fill up at pump #1 and drive (my typical 160-180) then refill at pump #2 (backside of pump #1) I get around 13.8 MPG then if I reverse that and after filling up at pump #2 then refueling on pump #1 I get 15.8 MPG but if I stick to pump 1 or 2 for several refills I get 14.8 MPG (the average of the alternating fill ups) everytime, so even spread across 160-180 miles of driving the variations between how full each of those pumps gets the tank before the pump cuts off can cause a multi MPG difference in calculations, so I could guess how much that throws off things on short drives like that.
I think you misunderstood what I was try to say, I was NOT implying it being anything about the fuel itself, I know it's all the same gas regardless the pump, it was about the auto shut-off of the individual pumps or as we call it around here the point "when the pump clicks off" being more sensitive on one pump vs the other pump resulting in about a half to 3/4 a gallon difference (in my case) in the fuel level in the gas tank after a fill up from one pump to the other (being the cause of my different MPG averages) and that at such a short drive as his 40 mile trip that that discrepancy from one pump to the other could significantly effect his MPG reading.Mounce said:You realize that pump 1 and 2 at the same station (and as far as that matters 3 through 8 or however many are there) are both fed by the same tank of gas going through the same filter for each grade right? Nothing fancy there, it's not the gas in your case bud.
ddgm said:If any pump meter readout differs by 1/2 to 3/4 actual gallon dispensed versus another pump, that station owner had better pack his belonging for a vacation at the government's expense. That's why you see those stickers on the pump certifying the accuracy.
littleblazer said:I haven't used the same pump the last 10 times I've filled up. My milage only changes by 10 miles between fill ups and my mpgs are all within .1. If one station has an issue then I can see that but that's also spread between 3 different gas stations. I understand what you're getting at though.
Edit: last 5 times I've filled up. Just looked at my log.
I'm not saying one pump is SAYING it pumping more then it is, they ARE ACCURATE (recently certified by the testing agency responsible for testing them), as exampled by the AVERAGE mileage between the 2 pumps being within 0.1 MPG of my tank averages when I use the SAME pump repeatedly, there is NO question to the ACCURACY of the pumps, what I'm saying is one pump physically puts more fuel into the tank BEFORE the pump clicks off and that because of the different levels of fuel in the tank as a result of the different "click" points is what causes the variation and why it's important to use the same pump repeatedly for accurate results.HARDTRAILZ said:Pumps that inaccurate would cause some serious lawsuits.
I never "round up", when it clicks it clicks, rounding up removes the control point of knowing your refilling the tank to the same level. thats why it's important to use the same pump since the level of fuel in the tank before it clicks might be different from one pump to the other.littleblazer said:I dunno. I normally tell the guys to not round it up since when they do it it normally over flows out the fill neck. Each truck is different but I've never really noticed a difference in the click when I was working. (See attached image. It stabilizes as it goes down because the routes became more consistent on tanks.) The outliers are highway trips. All I'm trying to say is topping off before you leave then refilling when you get there should give you a pretty accurate measure of fuel used even if let's say it was a gallon more or less then it should've been when you refueled. At nearly all highway that is still terribly low though.
By the way, my recent trips, 180 miles highway and about 40 miles in town yield that 15.5 mpg measurement. You gave my truck the disease man! [emoji6] Nah I'm only kidding. But it's pretty bad since I'm making my trip at 72 mph with cruise control on where as just this spring I made the same trip and got about 22 mpg... I blame the fuel pump. The truck hasn't been the same since I replaced that.
Screenshot_2015-10-07-17-35-36.png
Using works card I had to. It was prefered to be round.Daniel644 said:I never "round up", when it clicks it clicks, rounding up removes the control point of knowing your refilling the tank to the same level. thats why it's important to use the same pump since the level of fuel in the tank before it clicks might be different from one pump to the other.