The beast has screwed me yet again after repairs! gas mileage!

[Mike92Silver]

hey guys, not sure if you guys know, but i took a ride up to Freds place in Mass, great guy and all, did a great job, recommend him to anyone. Well we did a full 60k, replaced pretty much every sensor you can replace, valves, etc. Well before i went up there, i was only getting around 14mpg in the city, well the first fill up after all of freds hard work, i got 19mpg, i was like awesome, i havent gotten that good in awhile, so the next fill up, the car is eating more gas, and now im back down to 15mpg doing the same driving? how the **** do you lose 4mpg in the same weather pretty much, doing the same driving? i swear this car is ******* me off. Its like the car refuses to acknowledge it was worked on, hahah. EVerything was replaced, i have 4 new tires, new alignment, i get good highway mileage, but city sucks. Granted i only drive about 3 miles to work and 3 miles back and she dont warm up, but she wasnt warming up either when i got 19mpg!! Any ideas, I really think, theres nothing we can go on because i just had a full 60k, with all new sensors.

 

[SHO--ripper]

Did you put a new air filter in? What about O2 sensor's?

 

[sdpatt]

How much "not warming up" is it doing? If it never gets into the NORMAL range, it is still using the open-loop, rich fuel tables. Is your thermostat functioning properly?

 

[Mike92Silver]

it does warmup, if i drive it around a little more, Also, i just installed a dynomax exhaust about 3 months ago, and the donut is leaking already!!!!! and i feel a real loss of tq, like its pushing out to much and the gas pedal feels airy if thats a word. Would the two have anything to do with the gas mileage?

 

[quadmasta]

Mike92Silver:
it does warmup, if i drive it around a little more, Also, i just installed a dynomax exhaust about 3 months ago, and the donut is leaking already!!!!! and i feel a real loss of tq, like its pushing out to much and the gas pedal feels airy if thats a word. Would the two have anything to do with the gas mileage?

probably has just as much to do with gas mileage as my rusted out Y-pipe and mufflers with holes in 'em. mmmmm...donut