Bad gas mileage 00 civic ex
#1
Honda-Tech Member
Thread Starter
Bad gas mileage 00 civic ex
Not sure where to start.. besides the fact that my gas mileage has been horrible for the past year, and do not know what is causing this to be so bad. I have already replaced the primary o2 sensor and some basic tune up things like spark plugs, and that did absolutely nothing besides a little more throttle response. And on my last few tanks I literally have not once gotten more than 215 miles on a tank before the gas light came on.
So I searched around a lot today, and I saw in a lot of places that the MAP sensor can be a cause of running rich and thus consuming a lot of fuel causing bad gas mileage. I am currently not throwing any CEL and that is why I am starting to wonder what's causing this. It's still an automatic so I really dont ever get on it to where it would even affect gas mileage... So what I need help with is someone who may be able to determine which I should try first, either cleaning the MAP sensor, new fuel filter, or look around for a really good injector cleaner. Im sorry if this doesn't sound too clear, im just extremely tired right now. If anyone can help i'd really appreciate it. thanks
So I searched around a lot today, and I saw in a lot of places that the MAP sensor can be a cause of running rich and thus consuming a lot of fuel causing bad gas mileage. I am currently not throwing any CEL and that is why I am starting to wonder what's causing this. It's still an automatic so I really dont ever get on it to where it would even affect gas mileage... So what I need help with is someone who may be able to determine which I should try first, either cleaning the MAP sensor, new fuel filter, or look around for a really good injector cleaner. Im sorry if this doesn't sound too clear, im just extremely tired right now. If anyone can help i'd really appreciate it. thanks
#3
Honda-Tech Member
Re: Bad gas mileage 00 civic ex
Make sure the tune up parts are OEM.
-Plugs
-Wires
-Cap
-Rotor
-Fuel filter
-PCV valve (clean/replace)
-IACV valve (clean)
Check tire pressure/alignment. Make sure fluids are fresh/full
Check that the timing is correct.
-Plugs
-Wires
-Cap
-Rotor
-Fuel filter
-PCV valve (clean/replace)
-IACV valve (clean)
Check tire pressure/alignment. Make sure fluids are fresh/full
Check that the timing is correct.
#4
Re: Bad gas mileage 00 civic ex
Wow that is worse than my mileage 96 ex auto.
You can test the MAP sensor.
Just for curiousity look at your exhaust manifold, take off the heat shield and see it is cracked.
You can test the MAP sensor.
Just for curiousity look at your exhaust manifold, take off the heat shield and see it is cracked.
#5
Honda-Tech Member
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#9
Honda-Tech Member
Re: Bad gas mileage 00 civic ex
I have used it in my Civic
Prelude
CRX
EG
Audi RS4
Audi A4
and my DD
ofcourse i used it drove 100 miles than did a full tune up my mileage did improve in each car even without a tune up it wont get u from 31mpg to 55 but it will help cause it cleans out injectors
#10
Honda-Tech Member
Re: Bad gas mileage 00 civic ex
It seems his car may need to be tuned up and a fuel cleaner will not solve the problems. Fuel cleaners should be used every 5k or so to keep the fuel system clean. It can't fix worn plugs, wires, cap, rotor, a dirty IACV or a clogged PCV valve.
#11
Honda-Tech Member
Re: Bad gas mileage 00 civic ex
as i said after a 100 miles i did full tuneups...
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nikahng
Honda Civic / Del Sol (1992 - 2000)
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12-05-2007 11:19 AM