Very bad gas mileage :(
#1
Pole Position
Thread Starter
Very bad gas mileage :(
Hi,
I'm getting 10 miles a gallon city and 15 miles a gallon highway. This with me very light on the pedal. This problem is taking all the fun out of having a LS400.
There are no warning lights (except the TRAC which comes on sometimes after 5 mins of driving).
38 psi tire pressure.
No smoke or strange sounds or vibrations.
No obvious vacume leaks.
Now I've heard of sticking calipers. How do i check for it?
Any other things I can check for? I cant afford taking my car to a mechanic right now. I have most tools.
Any and all suggestions are very very appreciated.... Thanks in advance
I'm getting 10 miles a gallon city and 15 miles a gallon highway. This with me very light on the pedal. This problem is taking all the fun out of having a LS400.
There are no warning lights (except the TRAC which comes on sometimes after 5 mins of driving).
38 psi tire pressure.
No smoke or strange sounds or vibrations.
No obvious vacume leaks.
Now I've heard of sticking calipers. How do i check for it?
Any other things I can check for? I cant afford taking my car to a mechanic right now. I have most tools.
Any and all suggestions are very very appreciated.... Thanks in advance
#3
Lexus Test Driver
Join Date: Aug 2007
Location: NY
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i have 55k on my gs430..and have a thread on this too..
I get like 11mpg.
Possible culprits as RA40 said...
spark plugs, o2, maf sensor, air filter, decarb, fuel injector cleaning, pcv replacement, fuel filter....etc.
search on the gs section for 9.5mpg ... you'll see some more suggestions..
I get like 11mpg.
Possible culprits as RA40 said...
spark plugs, o2, maf sensor, air filter, decarb, fuel injector cleaning, pcv replacement, fuel filter....etc.
search on the gs section for 9.5mpg ... you'll see some more suggestions..
#4
Pole Position
Thread Starter
Thanks for the replies,
What i'm wondering is if there's any way to find out which of those parts is causing this. I really can't afford to replace all those parts and then find out my brakes were sticking or something else
What i'm wondering is if there's any way to find out which of those parts is causing this. I really can't afford to replace all those parts and then find out my brakes were sticking or something else
#5
Lexus Test Driver
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Location: NY
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Sure...
Lexus dealership!
1** for a diagnostic.
lol...I think that's the only way..
I'm considering it too..
But all the things I would be chaning I eventually have to change down the line wen im getting service done...so I'm extending the life either way...
Lexus dealership!
1** for a diagnostic.
lol...I think that's the only way..
I'm considering it too..
But all the things I would be chaning I eventually have to change down the line wen im getting service done...so I'm extending the life either way...
#7
Driver School Candidate
Join Date: Mar 2007
Location: hawaii
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#8
Pole Position
Thread Starter
The last place it trust is a dealership. I rather ask here on CL and just buy tools to fix.
#10
Pole Position
Thread Starter
Hi,
So I jacked the car up and the wheels turn ok. They are not completely free turning though. I can turn them by hand without much effort but if i let go they stop... Is that not normal? Would I have to take off the caliper housing to check the calipers? How?
I guess I need to buy a multimeter to check oxy sensors and MAF too??
So I jacked the car up and the wheels turn ok. They are not completely free turning though. I can turn them by hand without much effort but if i let go they stop... Is that not normal? Would I have to take off the caliper housing to check the calipers? How?
I guess I need to buy a multimeter to check oxy sensors and MAF too??
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