Gas mileage has gone to shit. Why?

[I Like Waffle]

my caprice gets 220 miles to a tank, and it has a 26 gallon tank //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif 427 ftl

 

[jco1385 5,000+ posts]

K & N type....re-usable

it's called a recharge kit IIRC

i just blow mine out with the air compressor

 

[dman4486 5,000+ posts]

Mine has gone to shit here recently to, but mine was from a vaccum line leak. PCV valve had to be replaced.

this is another option....any air leaks the engine has will cause it to run lean and the computer will try to compensate with more gas.

egr valve sticking open (also causes temp issues)

vacuum line leaking

PCV valve clogged with oil

 

[tc300 10+ year member]

change oil, check air filter, fuel filter... also doin 95 doesnt help on gas mileage!! LOL ur car is proly rapped up bout 5K in rpm

 

[dman4486 5,000+ posts]

it's called a recharge kit IIRC
i just blow mine out with the air compressor

yes

http://www.partsamerica.com/ProductDetail.aspx?MfrCode=KNN&MfrPartNumber=995000&CategoryCode=3335I

 

[tc300 10+ year member]

also check vac lines too

 

[DBfan187 5,000+ posts]

I was just glad it wasn't the intake gasket.

 

[Bass Addict 10+ year member]

by cleaning the MAF,youd be surprised how much difference this alone makes.i do it bout 3 times a year

 

[I Like Waffle]

speaking of egr valves, i removed all the emissions crap off my 81 pontiac which was the cat. converter, smog pump, etc etc. I put a rubber cap over the vaccum fitting for the egr valve, should it be actually hooked up so it has a vaccum on it? Also it has 2 MAP sensors on it, both have vacuum fittings, should both be hooked up? When i got it it only had one hooked up, and shows 1 on the vacuum diagram. Each sensor has a diff model number as well

 

[jco1385 5,000+ posts]

by cleaning the MAF,youd be surprised how much difference this alone makes.i do it bout 3 times a year

i do it every oil change or more. never can be too clean. just have to be really careful with it so it doesnt get fuxd

 

[ls2poweredgoat 5,000+ posts]

I know what a MAF is, but where is it located??

 

[dman4486 5,000+ posts]

speaking of egr valves, i removed all the emissions crap off my 81 pontiac which was the cat. converter, smog pump, etc etc. I put a rubber cap over the vaccum fitting for the egr valve, should it be actually hooked up so it has a vaccum on it? Also it has 2 MAP sensors on it, both have vacuum fittings, should both be hooked up? When i got it it only had one hooked up, and shows 1 on the vacuum diagram. Each sensor has a diff model number as well

EGR is not required....I disconnected it from my passport and the mav never had it.

now the map sensors will need vacuum if you still have the original computer setup.

 

[dman4486 5,000+ posts]

I know what a MAF is, but where is it located??

the mass airflow sensor is located in the intake path somewhere....usually just after the air cleaner.

 

[JayRich 10+ year member]

How bad is it on these Hondas? I did it on my Buick and it was a nightmare...//content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

Their is not fuel filter on this car, i believe just a pcv valve of something. Thats what the dealer told me

 

[I Like Waffle]

Does anyone here know what the thing is called thats inside the breather, that controls the little flap that opens the preheater tube? Whatever it is its operated by vaccum