Other than a heavy foot, spark plugs/wires (mine are new) why would the mileage on Halfassery be dropping? Seems to be down about 2 mpg since we bought it.
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03-07-2014
Other than a heavy foot, spark plugs/wires (mine are new) why would the mileage on Halfassery be dropping? Seems to be down about 2 mpg since we bought it.
03-07-2014
Carbon buildup, different fuels, O2 sensor getting old, MAF getting dirty...lots of things.
03-07-2014
I thought I replaced the 02 sensor! Just found the receipt. So, we'll rule that one out for now.
03-07-2014
I was wondering about different fuels.....MAF I can check. The 02 sensor "looks" new.
03-07-2014
Looks new from the outside, but on the inside is what counts. If it got carbon buildup in it, it needs to be replaced. If it hasn't been replaced in the last 75000 miles, it needs to be replaced. They get lazy.Originally Posted by traildog
03-07-2014
Haven't done the Seafoam trick yet. Maybe it's time.
03-07-2014
you could. but its best to do it before a tune up as it can foul the plugs.
03-07-2014
oh, and dont put full trust into the dic ave mileage. its not 100%.
the only way to really know you miles per gallon is to fill the tank, note your miles, run it down to low, then re fill the tank, now take the miles driven and gallons you just put in to figure out your mpg. simple division.
03-07-2014
Yep, that's the way I've been checking since the DIC is showing 2mpg less. I find it to be pretty accurate.
03-07-2014
do the math, you'll see a difference. ive done it, its not close at all. off by 3 to 4 mpg.
cold air, warming it upin the mornings all kill the mpg on the dic. may just be normal.
03-07-2014
I've also been wondering about the T Stat. The car runs at 180 deg. I think I read that they do better at 220?
03-07-2014
put a 195 in there, the car may not be warming up enough and its staying in closed loop, and killing mpg.
your engine wants to be at 210 deg's.
03-07-2014
The AeroForce always shows 180 degrees when the car is hot. I'll try a new t-stat.
If I put a 195 in, that will make it run at 220?
03-07-2014
Well stock stat is 195
Originally Posted by theaceofspades
03-07-2014
Just below 220 it closes at 210. It'll close the loop of the PCM isn't tuned for the 180
Originally Posted by theaceofspades
03-07-2014
If you intall in a 195, you'll see temps at 195-200 almost all the time. I never see above 210 in the hot summer.
03-11-2014
Which O2 sensor should you change upstream or downstream....or both???
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