Stumped over crappy mileage
#1
Stumped over crappy mileage
right now im gettin around 9-10MPG out of my 96 F150 w/ 302. I did a complete tuneup, new tps, new egr pressure sensor, new exhaust w/high flow cat, new o2 sensors and a seafoam treatment through a throttle body vacuum line. i still continue to get the same crappy mileage, babying it, or driving it hard. im stumped over this and would like to get it fixed. ive searched on here but tried almost everything ive found with no success. any ideas or suggestions are welcome.
#2
Originally Posted by Firefighter8-1
right now im gettin around 9-10MPG out of my 96 F150 w/ 302. I did a complete tuneup, new tps, new egr pressure sensor, new exhaust w/high flow cat, new o2 sensors and a seafoam treatment through a throttle body vacuum line. i still continue to get the same crappy mileage, babying it, or driving it hard. im stumped over this and would like to get it fixed. ive searched on here but tried almost everything ive found with no success. any ideas or suggestions are welcome.
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the tire size you have will not make that much difference, if you were running 33's i could see it! you might go over your vaccuum system, and check your EGR for leaks. this could cause your engine to run rich. recheck the EGR position sensor for proper installation. the computer relys on this for proper fuel metering! also recheck all your connections make sure no pins were pushed out ,(usually you would get a engine light) that is if your light works, assuming it does.
Last edited by termyt00; 01-15-2005 at 11:12 PM.
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#8
you EGR valve may be stuck open via trash &carbon build up...the computer cannot detect this!but it can detect the extra air comming in and compensate for it. thus causing your bad gas milage. make sure you put the 2 hoses back to the right ports...
Last edited by termyt00; 01-16-2005 at 01:24 AM.
#9
What sort of driving do you do? A lot of short trips will hurt your mileage, especially in cold weather. Do you use the 10% ethanol? Switching to regular would probably gain you about 1 MPG. Have you tried a treatment of the fuel injector cleaner you add to your gas tank? This could help your mileage even if the engine seems to run smooth. I assume you changed the air filter. Just a few small suggestions.
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Codes?
Have you pulled your codes to see what your buddy, the computer, thinks is wrong? I haven't seen any mention of that. Change the lube in your dfferential and your transmission as well as the transmission filter if an automatic. You've started to systematically find the culprit, keep on the trial.
Tex
Tex
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