trey_phish83 Posted March 8, 2011 Report Share Posted March 8, 2011 05 2wd, intake exhaust. i've been suffering with under 10MPG for the last six months of driving my truck. usually its around 14 mpg, which isn't bad. i'm not very heavy in the trottle, specially with the winter conditions. i've haven't changed anything, its still only got 40k on the motor. regular synthetic oil change. just been driving it. it almost seems i get better gas mileage in the summer when i switch computers to my reprogrammed pcm. does anyone have any advice on how to improve my MPG ? Quote Link to comment Share on other sites More sharing options...
WretchedSS Posted March 8, 2011 Report Share Posted March 8, 2011 Wow, that's terribly low. I'm at 14.5 w/ a volant CAI with no other engine mods. Quote Link to comment Share on other sites More sharing options...
catdaddy300 Posted March 8, 2011 Report Share Posted March 8, 2011 yeah man that is horrible i average like 15/16 with no mods Quote Link to comment Share on other sites More sharing options...
04CHASE Posted March 8, 2011 Report Share Posted March 8, 2011 something is off , quite a few things to check air filter fuel filter alignment tire pressure. bad cat/cat's some other thigns too DRIVING HABITS i read your post just giving you crap winter weather wont effect it much , the dense air is good for hp but takes more fuel to burn stoich. though it will also take less throttle to get the same response since hp is up so thats why it wont effect it much. is there any dtc's? Quote Link to comment Share on other sites More sharing options...
nikon1999 Posted March 8, 2011 Report Share Posted March 8, 2011 Yikes! I would definitely think something is wrong if its not your right foot ;) I drive an AWD 6.2L and get 12mpg city using my remote start everyday... Quote Link to comment Share on other sites More sharing options...
8hnpSS Posted March 8, 2011 Report Share Posted March 8, 2011 stop lying man lose some weight in that right foot LOL check over what chase said its probably one of those Quote Link to comment Share on other sites More sharing options...
canadianVRss Posted March 8, 2011 Report Share Posted March 8, 2011 Wow that is bad! My milage has gone down the crapper the last 6 months too and there's a horrible rattling from under the truck, pretty sure my cats are toast. Obxr long tubes with resonators are on the way, screw that cat junk! my milage started getting bad BEFORE the noise though so if you start to hear a vibration or rattle at idle, that should pretty much tell you it's cat time. Quote Link to comment Share on other sites More sharing options...
trey_phish83 Posted March 8, 2011 Author Report Share Posted March 8, 2011 i'll check everything over, being that its a 05 with less the 70k, my dealership would have to replace the cat's for free right? also, clogged cats would cause it to studder at idle? Quote Link to comment Share on other sites More sharing options...
trey_phish83 Posted March 8, 2011 Author Report Share Posted March 8, 2011 also, whats a DTC? Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted March 8, 2011 Report Share Posted March 8, 2011 DTC = Diagnostic Trouble Code Also, take into context that this is not the best time of year for good gas mileage. Winter blends of gasoline are known to render worse then average fuel mileage, not to mention that extended idle time during the winter have an adverse effect on fuel economy. How are you calculating your mileage? Are you just going by the Driver Information Center? Quote Link to comment Share on other sites More sharing options...
desrtrat Posted March 8, 2011 Report Share Posted March 8, 2011 why are you swapping out your PCM during the winter? dirty injectors will kill mpg also..you can try 1-2 cans of Sea Foam on your fuel tank, a good TB cleaning. good luck Quote Link to comment Share on other sites More sharing options...
trey_phish83 Posted March 9, 2011 Author Report Share Posted March 9, 2011 no dtc's have ever popped up on my truck. i did the math its 9.8 on the dash and 10mpg on paper. i switch the computers around from summer to winter because of the traction control option. its a 2wd. Quote Link to comment Share on other sites More sharing options...
trey_phish83 Posted March 9, 2011 Author Report Share Posted March 9, 2011 i picked up some sea foam as advised as well. tomorrows full tank will get that treatment. only thing i don't understand is, such an odd container, how do pour that stuff in my tank! Quote Link to comment Share on other sites More sharing options...
04CHASE Posted March 9, 2011 Report Share Posted March 9, 2011 (edited) do they sell funnels in nh? Edited March 9, 2011 by 04CHASE (see edit history) Quote Link to comment Share on other sites More sharing options...
trey_phish83 Posted March 9, 2011 Author Report Share Posted March 9, 2011 Funnels! thats too fancy for me ha ha chase, that is a nasty ss, is it still street driveable? like cruise around and go have fun? or is it strickly a drag truck? Quote Link to comment Share on other sites More sharing options...
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