losing gas while parked??? wtf

ZenkiS14 · Post by **ZenkiS14** » Fri Mar 02, 2012 1:43 am

Ok, I know this probably sounds crazy, but im pretty confident that I burn gas while the car is parked..... ? over the past year or so, I have been getting worse ans worse gas milaleage, and I notice that the biggest loss is noticed within the first few miles of the day and at the end of the work day. Like it seems lower than when I parked it, I just thought I was crazy.

I just figured the engine was getting worn out...however, this weekend I put near 400 miles on it in a 24hr period driving to the rally, all over the stages, and home. All with 4people in the car and driving fairly agressively at high rpms...i averaged 36+mpg on this trip. This is the best ive seen in a long time, especially considering the variables...someone please give me some insight. Also, when I pit the car on a lift, it smells a bit like fuel around the back of the car outside. No smell inside.

Cause I got like 420 miles to my last tank, that I burned in about 24 hours, and this tank thats taken me all week to get through, I'll be lucky to get 320 miles out of....IDK WTF!!!!

Also my running temp never reaches the half-way point either, it hangs out below the half way point all the time. takes like 10min of driving to even begin to warm up.....

Waffles · Post by **Waffles** » Fri Mar 02, 2012 1:48 am

How is your gas cap?

92_luder · Post by **92_luder** » Fri Mar 02, 2012 1:52 am

Waffles;288380 wrote:How is your gas cap?

i was jus gonna say it might b evaporating, either tht or you have a leak

getteg · Post by **getteg** » Fri Mar 02, 2012 1:53 am

Yo shit is f'ed son!

For real though check to see if there are any holes in the rubber hose that connects the filler neck to the tank.

Also if you have ever changed the fuel pump make sure none of the bolts came loose and you have gas splashing out of the top of your tank.

ZenkiS14 · Post by **ZenkiS14** » Fri Mar 02, 2012 3:06 pm

Never changed the fuel pump

its a gas cap off of a miata....so honestly Im not sure.

Do these cars really like OEM Honda caps?

Are there places where it will regularly leak or people have problems with?

Cause I got like 420 miles to my last tank, that I burned in about 24 hours, and this tank thats taken me all week to get through, I'll be lucky to get 320 miles out of....IDK WTF!!!!

Waffles · Post by **Waffles** » Fri Mar 02, 2012 3:13 pm

Its not pick where the gas cap came from, just that the seal is good.

it seems like the gas is evaporating somewhere, usually the gas cap is the largest opening that would allow that. Another place is to see if the rubber part of the filler neck has a good seal. If its rotted or cracked on the top of the hose, you would not spill gas on fill up, but it would be a constant place for it to evaporate.

if the car is a 96+ it should give you a CEL if your fuel system isn't sealed.

ZenkiS14 · Post by **ZenkiS14** » Fri Mar 02, 2012 3:14 pm

Sorry it's a 1994 Civic Si with 182,000 miles. Bone Stock. Literally.

ZenkiS14 · Post by **ZenkiS14** » Fri Mar 02, 2012 6:33 pm

I looked today, and noticed the gasket sealing the filler neck is leaking pretty bad, so it might be evaporating out of there! Im going to replace that, the fuel cap, and the thermostat, and see what I get!