How to fix poor gas mileage on a 2004 es330? - Page 2 - Club Lexus Forums


How to fix poor gas mileage on a 2004 es330?

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Old 03-18-12, 03:13 PM   #16
Ovega07
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My average mile cluster reads from 16 to most I've seen 20 mpg
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Old 03-18-12, 04:17 PM   #17
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I use 93 Shell V-Power gas only.

Going to get new air filter today. Will report back with results.

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My average mile cluster reads from 16 to most I've seen 20 mpg
Just noticed you live in RI as well! Nice to finally see another CL member that lives in RI.
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Old 03-18-12, 11:27 PM   #18
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Ok I just filled the tank today and the computer shows: RANGE 245 mi
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Old 03-19-12, 12:19 AM   #19
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Dont forget to clean the MAF sensor. You can thank me later
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Old 03-19-12, 03:25 AM   #20
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245 miles? hmm..yeah clean the MAF. and air filter..good lord....

I'm at 175 miles now and not even near the halfway mark on my gas gauge
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Old 03-19-12, 04:20 AM   #21
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Yeah this kinda gas mileage isnt really good. But quick question I have no idea where the MAF sensor is and I never usually touch anything under the hood (besides oil and windshield fluid) since I don't wanna mess anything up. Can I change the MAF myself or should I just take to Valvoline or somewhere else to get it cleaned?

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Old 03-19-12, 06:36 AM   #22
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Candidly, I would take your car to Lexus and simply have them run diagnostics. They can find the issue quickly and not create more of a mess in the process.
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Old 03-19-12, 08:09 AM   #23
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clean the MAF sensor, clean the throttle body, replace the air filter, use a fuel additive to clean out the fuel injectors.
all can help increase your MPG by allowing the car to breathe cleanly and flow fuel efficiently.
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Old 03-20-12, 08:17 PM   #24
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Quote:
Originally Posted by brucelee1 View Post
Candidly, I would take your car to Lexus and simply have them run diagnostics. They can find the issue quickly and not create more of a mess in the process.
They'll probably charge $120 to run diagnostics.

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clean the MAF sensor, clean the throttle body, replace the air filter, use a fuel additive to clean out the fuel injectors.
all can help increase your MPG by allowing the car to breathe cleanly and flow fuel efficiently.
I used the STP complete fuel cleaner stuff on my last tank fillup so maybe it'll help.

Also I just changed the engine air filter (which was incredibly dirty) so I'm hoping for an improvement, if not I'll get the Mass AirFlow Sensor cleaned or, if need be replaced.

I don't really touch anything under the hood due to the fear of messing something up so should I go somewhere to get all that cleaned?
My ES has 121K miles since I drive 60 miles everyday ( Monday- Friday ) on the highway.

Last edited by KS13; 03-20-12 at 08:23 PM.
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Old 03-20-12, 09:32 PM   #25
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Quote:
Originally Posted by Patsum View Post
245 miles? hmm..yeah clean the MAF. and air filter..good lord....

I'm at 175 miles now and not even near the halfway mark on my gas gauge
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Yeah this kinda gas mileage isnt really good. But quick question I have no idea where the MAF sensor is and I never usually touch anything under the hood (besides oil and windshield fluid) since I don't wanna mess anything up. Can I change the MAF myself or should I just take to Valvoline or somewhere else to get it cleaned?
Make sure you are cleaning the MAF sensor... When you take out the sensor, the long needle inside with a hard wax on top is the Intake Air Temperature Sensor, not the MAF. If you just clean that, your MAF is still dirty. The MAF sensor has 2 wires inside the hole. Look carefully inside and clean them good.
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Old 03-20-12, 10:25 PM   #26
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I had my 04 ES fuel system clean using the the BG system. Big difference. Better throttle response, mileage.
Lexus dealer did it, same price as my local shop. Getting about 25-26 mpg, driving 55-60. Driving to work and back, not highway, that's 3-4 mile stretch between lights. About 28 miles round trip.
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Old 03-21-12, 09:41 PM   #27
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Quote:
Originally Posted by GS4_Fiend View Post
Make sure you are cleaning the MAF sensor... When you take out the sensor, the long needle inside with a hard wax on top is the Intake Air Temperature Sensor, not the MAF. If you just clean that, your MAF is still dirty. The MAF sensor has 2 wires inside the hole. Look carefully inside and clean them good.
How exactly do I clean the MAF? Also is it safe for me to do it myself, meaning I don't want to mess anything up and illuminate the Check Engine Light. Thanks again


Btw half tank and range says "96 Miles". I hate this....
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Old 03-23-12, 08:35 AM   #28
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Also guys with es330 car specs says the gas tank is a 18 gallon tank. When u guys fill up do y'all actually fill up with 18 gallons?
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Old 03-23-12, 07:32 PM   #29
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Quote:
Originally Posted by Ovega07 View Post
Also guys with es330 car specs says the gas tank is a 18 gallon tank. When u guys fill up do y'all actually fill up with 18 gallons?
Yup, when I fill up my tank when its almost completely empty, according to the the gas pump says 18.2 gallons (I overfill it).
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Old 03-24-12, 10:12 AM   #30
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how we drive is also very impt. to gas mileage. i coast often when a red light is 1/4 mile ahead and accelerate slowly. the lexus is so smooth to me and I don't feel the funny shift in the tranny often because I like to accelerate slowly. no way would I use autozone MAF.
this is a bigger sedan, AND 23-24MPG is pretty good on our 05 that my wife drives about 300-350 miles per wk.
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