18MPG . . . No CEL . . . Bad?
07-08-2010, 11:55 AM
#41
Senior Member
Join Date: Sep 2009
Location: Worcester, MA
Posts: 4,011
Nice, RedfoxXx!
I can also participate! My MPG is even less then yours
It's 14-16 MPG in the city and around 20 MPG highway.
I've changed everything:
both O2 sensors,
knock sensor,
fuel filter,
spark plugs,
also installed a K&N filter in stock housing,
no errors in the system,
the tires are pumped with nitrogen.
What else to check?
May the clogged cat to make such a huge consumption?
I can also participate! My MPG is even less then yours
It's 14-16 MPG in the city and around 20 MPG highway. I've changed everything:
both O2 sensors,
knock sensor,
fuel filter,
spark plugs,
also installed a K&N filter in stock housing,
no errors in the system,
the tires are pumped with nitrogen.
What else to check?
May the clogged cat to make such a huge consumption?
u reset ECU??
im seeing 27-28 hwy/19-20 city.
07-08-2010, 12:40 PM
#42
Nice, RedfoxXx!
I can also participate! My MPG is even less then yours It's 14-16 MPG in the city and around 20 MPG highway.
I've changed everything:
both O2 sensors,
knock sensor,
fuel filter,
spark plugs,
also installed a K&N filter in stock housing,
no errors in the system,
the tires are pumped with nitrogen.
What else to check?
May the clogged cat to make such a huge consumption?
I can also participate! My MPG is even less then yours
It's 14-16 MPG in the city and around 20 MPG highway. I've changed everything:
both O2 sensors,
knock sensor,
fuel filter,
spark plugs,
also installed a K&N filter in stock housing,
no errors in the system,
the tires are pumped with nitrogen.
What else to check?
May the clogged cat to make such a huge consumption?
FYI I have read that the oil from some of those performance intake filters (like K&N) can cause your MAF to have false readings . . . don’t know if it’s true or not but there is a lot of Lexus people who swear by this
UPDATE: still getting 22+ MPG and not CEL yet since Rear O2 Replacement and MAF Cleaning
Last edited by RedfoxXx; 07-08-2010 at 12:42 PM.
07-08-2010, 01:05 PM
#44
Newbie - Just Registered
Join Date: Nov 2009
Posts: 10
I replaced the CAT a few years ago with a magnaflow High Flow Unit so it should be fine
FYI I have read that the oil from some of those performance intake filters (like K&N) can cause your MAF to have false readings . . . don’t know if it’s true or not but there is a lot of Lexus people who swear by this
UPDATE: still getting 22+ MPG and not CEL yet since Rear O2 Replacement and MAF Cleaning
FYI I have read that the oil from some of those performance intake filters (like K&N) can cause your MAF to have false readings . . . don’t know if it’s true or not but there is a lot of Lexus people who swear by this
UPDATE: still getting 22+ MPG and not CEL yet since Rear O2 Replacement and MAF Cleaning
About the K&N filters oil... I don't think it's true. I had a cone K&N filter on my previous car and it didn't make any problems, I think it even gave bigger MPG. (but I'll probably will switch back to stock filter, because it's quite dusty here and the car is not for racing, but for daily driving)
22 MPG is REALLY nice. I basically started having the issue with MPG after I've decided to clean my cilinders and used a special fluid for it, which was connecting to the vacuum of the manifold(might be it made the CAT dirty).
Last edited by DuQ3r; 07-08-2010 at 01:08 PM.
07-08-2010, 11:27 PM
#45
Junior Member
Join Date: Jun 2010
Posts: 27
What does that have to do with fuel consumption? Not trying to sound like a ****, I'm seriously curious, since I have the same problem.
one of the break pads was as thick as a cracker.
07-09-2010, 12:15 AM
#46
07-09-2010, 07:59 AM
#47
07-09-2010, 11:02 AM
#48
Senior Member
Join Date: Apr 2005
Location: 92626
Posts: 1,187
07-09-2010, 07:20 PM
#49
Junior Member
Join Date: Jun 2010
Posts: 27
07-12-2010, 10:26 PM
#53
i had a 5 speed, and it used to get 22mpg if im lucky.
with my auto maxima, i used to get 18, and that was regular driving thru city and highway, i think 18 is ok.
(note, 18 was without a/c. so ur good)
with my auto maxima, i used to get 18, and that was regular driving thru city and highway, i think 18 is ok.
(note, 18 was without a/c. so ur good)
07-13-2010, 02:18 AM
#55
i need to replace my rear pads/rotors, as they scrape as i drive...perhaps my problem is this also...if this week is nice out ill see if this is my case, but i do seem to have 200 miles on half tank from full...i used to get around 400 miles per tank...then i got around 320...i replaced cyl 1's coil and it looks like a help...
11-03-2010, 09:26 AM
#56
Found a problem with the car over the weekend.
I noticed when I park on a decline with a full tank that I was leaking gasoline to the ground. As it turns out the plastic top of the gas tank (where the fuel level instrument hangs from) was cracked and leaking. A replacement form the local junk yard fixed the leak and stopped the bogging problem. However I have got the 0706 CEL twice since then, wired huhn?
I noticed when I park on a decline with a full tank that I was leaking gasoline to the ground. As it turns out the plastic top of the gas tank (where the fuel level instrument hangs from) was cracked and leaking. A replacement form the local junk yard fixed the leak and stopped the bogging problem. However I have got the 0706 CEL twice since then, wired huhn?
11-03-2010, 10:42 AM
#57
during the summer i was getting 22-23 mpg mostly city and using the a/c about 75% of the time. Tire pressures were 36 34. Running Gulf 93 octane. I was highly impressed because I struggled to get 20 in my 00 max.
11-03-2010, 11:01 AM
#58
Junior Member
Join Date: Jul 2008
Posts: 25
My wifes 97 has 206,xxx on the clock and her milage has been getting worse as of late. A while back our BG rep at my shop sold us on some new equipment for PM service that cleans the TB/manifold/valves/pistons/cylinder walls/and HO2S. The other piece does fuel system cleaning for the rail and injectors. You also throw a can of 44k in the tank.
I am not big on gimmicks and only sell the service because my boss tells me too. Until now. I ran all three parts of the process the same day and went from 18 mpg mixed to 25 mpg mixed and beating on it.
I also tore the thing apart for "the oil leak" and got to see just how good this product is and holy ish it works well. I would just change the oil after just in case. Also I havent seen any ruined cats yet but it doesnt mean it cant happen. Mine is reading just fine and a backpressure test confirms it's okay. Good luck and sorry for the commercial but I am really happy about this.
My wife thinks PM service is a joke even though it keeps food in her belly so this is a little jab back at her.
He is doing the manifold service here but he is also doing it wrong and as you can see he is spilling the product in the engine compartment. http://www.youtube.com/watch?v=S2yNvI2h6Vo
I am not big on gimmicks and only sell the service because my boss tells me too. Until now. I ran all three parts of the process the same day and went from 18 mpg mixed to 25 mpg mixed and beating on it.
I also tore the thing apart for "the oil leak" and got to see just how good this product is and holy ish it works well. I would just change the oil after just in case. Also I havent seen any ruined cats yet but it doesnt mean it cant happen. Mine is reading just fine and a backpressure test confirms it's okay. Good luck and sorry for the commercial but I am really happy about this.
My wife thinks PM service is a joke even though it keeps food in her belly so this is a little jab back at her.
He is doing the manifold service here but he is also doing it wrong and as you can see he is spilling the product in the engine compartment. http://www.youtube.com/watch?v=S2yNvI2h6Vo
Last edited by Cams; 11-03-2010 at 11:14 AM.
11-03-2010, 11:09 AM
#59
have you changed your plugs and fuel filter? i know my plugs need to be changed and my gas mileage sucks and i have no ac. change those to things and you should get some kind of better mileage. i'm using NGK but i think i'm going to try those E3's that i see on TV, anyone tried those plugs?...
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