Fuel mileage dropped about 1.5-2mpg out of the blue
CF Senior Member
Joined: Mar 2008
Posts: 437
Likes: 2
From:
2. i think i have answer to your issue, though. read quote.
i had this done to my cars. we own 5 now, all of them have K&N filters in them. it is a known issue with oiled filters - OVEROILING. it is very hard to get just right thin oil film on them. if too much oil applied and filter is rushed to be reinstalled, without enough drying time, it'll splash oil on - what's next in the air intake? - MAF sensor. that one will skew air flow readings to ECM.
do 2 things:
1. look inside the air filter housing. do you see any pink oil in the bottom? signs of drippage.
2. remove and clean your MAF sensor with proper solvent.
i start having gut feeling i am on the right track. takes some time for enough oil droplets to buildup on MAF mesh. then it just gets to the point it starts doing its evil job. you can let it run like this and see if MAF code will come up.
CF Active Member
Joined: Feb 2008
Posts: 243
Likes: 0
From: Virginia
the MAF sensor is located right at the airbox.
the guy above me is right, if you over oiled the K&N, it could cause some issues with the MAF sensor, just take it off and clean it. i think autozone carries MAF cleaner
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May 2009
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May 2009
Joined: Jan 2008
Posts: 1,598
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From: Westminster, Md.
I wasn't referring to the temperature, the states dictate different fuel mixes and additives for different times of year and I thought this may be a factor. For example here in Md. we use oxygenated fuel during the winter months.
CF Active Member
Joined: May 2009
Posts: 131
Likes: 0
From: Anchorage, AK
Got this in an email.. makes you wonder eh...
This is true. It happened to them
> three weeks ago
> somewhere in Lewiston on our way to Augusta . The pump
> should have totaled @ $38.00 (and change). When the receipt
> was printed, and she checked it was $ 47.00 (and change).
>
> She got mad, went inside the store, asked for a calculator
> and let them do the math. They refunded her. she told them
> that if they cheat, they had better make it right. Normally,
> her husband would skip printing the receipt.. Not her
> We saw on the news the other night that this is happening
> everywhere.
>
> Brian pumped exactly one gallon of gas. The price did not
> match the cost
>
> of one gallon. It was higher. He went inside and
> complained, got a refund.
>
> There is also a number on each pump that you can call and
> complain..
> This is a true story, so read it carefully.
>
> On March 24, 2009, I stopped at a gas station in Lewiston .
> My truck's gas gauge was on 1/4 of a tank. I use the
> mid-grade, which was priced at $2.21 per gallon. When my
> tank is at
>
> this point, it takes somewhere around 14 gallons to fill it
> up.
>
> When the pump showed 14 gallons had been pumped, I began to
> slow it down.
>
> Then, to my surprise, it went to 15, then 16. I even looked
> under my truck to see if it was being spilled. It was not.
>
> Then it showed 17 gallons on the pump. It stopped at 18
> gallons. This was very strange to me, since my truck has
> only an 18 gallon tank. I went on my way a little confused,
> then on the evening news I heard a report that 1 out of 4
> gas stations had calibrated their pumps to show more gas had
> been pumped than a person actually got.
>
> Here is how to check a pump to see if you are getting the
> right amount:
>
> Whichever grade you are using, put EXACTLY 10 GALLONS in
> your tank, then look at the dollar amount. If the dollar
> amount is not EXACTLY 10 times the price of the fuel you
> have chosen, then the pumps are rigged.
>
> In my case, as I said, the mid-grade was $2.21
> 9/10 per gallon; my dollar amount for 10 gallons should
> have been $22.19. I wish I had checked the pump. It
> doesn't matter where you pump gas, please check the 10
> gallon price. If you do find a station that is cheating,
> contact the state Agriculture Department, and direct your
> comments to the Commissioner, the info is on the gas pumps.
>
> Please don't delete this until you have sent it to all
> people in your address book. We need to put a stop to this
> outrageous cheating of customers. The gas companies are
> making enough profits as it is!
This is true. It happened to them
> three weeks ago
> somewhere in Lewiston on our way to Augusta . The pump
> should have totaled @ $38.00 (and change). When the receipt
> was printed, and she checked it was $ 47.00 (and change).
>
> She got mad, went inside the store, asked for a calculator
> and let them do the math. They refunded her. she told them
> that if they cheat, they had better make it right. Normally,
> her husband would skip printing the receipt.. Not her
> We saw on the news the other night that this is happening
> everywhere.
>
> Brian pumped exactly one gallon of gas. The price did not
> match the cost
>
> of one gallon. It was higher. He went inside and
> complained, got a refund.
>
> There is also a number on each pump that you can call and
> complain..
> This is a true story, so read it carefully.
>
> On March 24, 2009, I stopped at a gas station in Lewiston .
> My truck's gas gauge was on 1/4 of a tank. I use the
> mid-grade, which was priced at $2.21 per gallon. When my
> tank is at
>
> this point, it takes somewhere around 14 gallons to fill it
> up.
>
> When the pump showed 14 gallons had been pumped, I began to
> slow it down.
>
> Then, to my surprise, it went to 15, then 16. I even looked
> under my truck to see if it was being spilled. It was not.
>
> Then it showed 17 gallons on the pump. It stopped at 18
> gallons. This was very strange to me, since my truck has
> only an 18 gallon tank. I went on my way a little confused,
> then on the evening news I heard a report that 1 out of 4
> gas stations had calibrated their pumps to show more gas had
> been pumped than a person actually got.
>
> Here is how to check a pump to see if you are getting the
> right amount:
>
> Whichever grade you are using, put EXACTLY 10 GALLONS in
> your tank, then look at the dollar amount. If the dollar
> amount is not EXACTLY 10 times the price of the fuel you
> have chosen, then the pumps are rigged.
>
> In my case, as I said, the mid-grade was $2.21
> 9/10 per gallon; my dollar amount for 10 gallons should
> have been $22.19. I wish I had checked the pump. It
> doesn't matter where you pump gas, please check the 10
> gallon price. If you do find a station that is cheating,
> contact the state Agriculture Department, and direct your
> comments to the Commissioner, the info is on the gas pumps.
>
> Please don't delete this until you have sent it to all
> people in your address book. We need to put a stop to this
> outrageous cheating of customers. The gas companies are
> making enough profits as it is!
CF Active Member
Joined: Feb 2008
Posts: 243
Likes: 0
From: Virginia
[QUOTE
> On March 24, 2009, I stopped at a gas station in Lewiston .
> My truck's gas gauge was on 1/4 of a tank. I use the
> mid-grade, which was priced at $2.21 per gallon. When my
> tank is at
>
> this point, it takes somewhere around 14 gallons to fill it
> up.
>
> When the pump showed 14 gallons had been pumped, I began to
> slow it down.
>
> Then, to my surprise, it went to 15, then 16. I even looked
> under my truck to see if it was being spilled. It was not.
>
> Then it showed 17 gallons on the pump. It stopped at 18
> gallons. This was very strange to me, since my truck has
> only an 18 gallon tank. I went on my way a little confused,
> then on the evening news I heard a report that 1 out of 4
> gas stations had calibrated their pumps to show more gas had
> been pumped than a person actually got.
>
> Here is how to check a pump to see if you are getting the
> right amount:
>
> Whichever grade you are using, put EXACTLY 10 GALLONS in
> your tank, then look at the dollar amount. If the dollar
> amount is not EXACTLY 10 times the price of the fuel you
> have chosen, then the pumps are rigged.
>
> In my case, as I said, the mid-grade was $2.21
> 9/10 per gallon; my dollar amount for 10 gallons should
> have been $22.19. I wish I had checked the pump. It
> doesn't matter where you pump gas, please check the 10
> gallon price. If you do find a station that is cheating,
> contact the state Agriculture Department, and direct your
> comments to the Commissioner, the info is on the gas pumps.
>
> Please don't delete this until you have sent it to all
> people in your address book. We need to put a stop to this
> outrageous cheating of customers. The gas companies are
> making enough profits as it is! [/COLOR][/FONT][/QUOTE]
whoever said that obviously doesnt realize that most gas guages in cars and trucks are not very accurate. if i park on a hill with a 1/4 mine reads 1/2 full till i start driving around some.
but yes some pumps are off.
also if you used E10 gas that could knock some miles off. the last hold out where i live (chevron) just went to E10, so i have to use that crap whether i like it or not.
> On March 24, 2009, I stopped at a gas station in Lewiston .
> My truck's gas gauge was on 1/4 of a tank. I use the
> mid-grade, which was priced at $2.21 per gallon. When my
> tank is at
>
> this point, it takes somewhere around 14 gallons to fill it
> up.
>
> When the pump showed 14 gallons had been pumped, I began to
> slow it down.
>
> Then, to my surprise, it went to 15, then 16. I even looked
> under my truck to see if it was being spilled. It was not.
>
> Then it showed 17 gallons on the pump. It stopped at 18
> gallons. This was very strange to me, since my truck has
> only an 18 gallon tank. I went on my way a little confused,
> then on the evening news I heard a report that 1 out of 4
> gas stations had calibrated their pumps to show more gas had
> been pumped than a person actually got.
>
> Here is how to check a pump to see if you are getting the
> right amount:
>
> Whichever grade you are using, put EXACTLY 10 GALLONS in
> your tank, then look at the dollar amount. If the dollar
> amount is not EXACTLY 10 times the price of the fuel you
> have chosen, then the pumps are rigged.
>
> In my case, as I said, the mid-grade was $2.21
> 9/10 per gallon; my dollar amount for 10 gallons should
> have been $22.19. I wish I had checked the pump. It
> doesn't matter where you pump gas, please check the 10
> gallon price. If you do find a station that is cheating,
> contact the state Agriculture Department, and direct your
> comments to the Commissioner, the info is on the gas pumps.
>
> Please don't delete this until you have sent it to all
> people in your address book. We need to put a stop to this
> outrageous cheating of customers. The gas companies are
> making enough profits as it is! [/COLOR][/FONT][/QUOTE]
whoever said that obviously doesnt realize that most gas guages in cars and trucks are not very accurate. if i park on a hill with a 1/4 mine reads 1/2 full till i start driving around some.
but yes some pumps are off.
also if you used E10 gas that could knock some miles off. the last hold out where i live (chevron) just went to E10, so i have to use that crap whether i like it or not.
