lcolombo

Hello, I have a Lexus gs 400 2000,93k my car spends a lot of gasoline, only 10 Miles in the city, I have no light on in the panel, I think changing the spark plugs and clean the throttle body. Do you recommend? help

bonesnj0

Change plugs first then clean MAF look at condition of plugs (all) before and then put some miles on her and check at least 1 plug to see how she's running I would think you should get 17 MPG.
Any codes?

bonesnj0

I try to do one thing at a time on my cars then see if I get the results i'm looking for to learn.

tmf2004

iTrader: (15)

spark plugs, O2 sensors, fuel filter, MAF clean. just a few possibilities... run a system check also

lcolombo

thanks for the help, no code, I'll do what you advise.

DaveGS4

iTrader: (2)

What is your tire pressure set at? Also last time you changed your engine air filter?

STREETGS

How long had this problem for? And how long have u had the car for? Check to see if your check eng light actually comes on when u turn the key.

Hook up a scantool to it sometimes the light wont come on but it will have stored codes..

lcolombo

The air filter is new, the air pressure is not. I'll check.

lcolombo

I have a month with the car, I'll have to scan it

STREETGS

If the light does work & no codes found...

Do a "full tune-up"
( i suggest that if u cannot do everything yourself, and will take it to a shop do the easy stuff yourself first that way the shop won try to hustle u..._)

1-air filter
2-clean throttle body
3-replace spark plugs
4-change oil and add "engine-restore" (sold at auto zone)
5-change fuel filter
6-change pcv valve
7-clean maf sensor
8-clean fuel injectors................................

STREETGS

Just as i suspected sometimes people clear all codes from a car they are about to sell, in some cases even remove the light bulb from the check eng light .......

gsean400

I get 14 all day bro.. That's what an exhaust and 20" wheels will to do ya

Mike_1GO

iTrader: (2)

an aftermarket exhaust will not decrease mileage...

marshun

i would start with spark plugs. learn to read them

gsean400

It does when you wanna hear it lol