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post #1 of 18 (permalink) Old 03-13-2005, 05:26 PM Thread Starter
 
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fuel consumption

Suddenly my fuel economy has gone to the toilet. I am driving the same way, except it seems like Im missing about 2 gallons of fuel. I used to get around 21 MPG or so and now Im in the range of like 18 MPG. Im wondering whats going on? I had put some cheesy cone filter, and thats when I notice the fuel change, and now I've resently gone back to the stock airbox. And its still the same, anyone got any ideas?
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post #2 of 18 (permalink) Old 03-13-2005, 05:51 PM
 
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it happens quite often in the winter... in the summer time I get about 26-29mpg, but come winter time, it drops to about 20-23 mpg...

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post #3 of 18 (permalink) Old 03-13-2005, 05:57 PM Thread Starter
 
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I would of thought that with cold air and such that I'd get better cause of the air fuel ratio is better
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post #4 of 18 (permalink) Old 03-13-2005, 06:02 PM
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It wouldn't hurt to clean your MAF. If you were using an oiled filter (like K&N air filters), the MAF is probably pretty dirty. Oil from the filter tends to make its way onto the MAF elements and attracts dirt.

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post #5 of 18 (permalink) Old 03-13-2005, 06:07 PM Thread Starter
 
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anyone think that plugs, and a fuel filter would effect it that much?
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post #6 of 18 (permalink) Old 03-13-2005, 06:37 PM
 
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Quote:
Originally Posted by tbird96
I would of thought that with cold air and such that I'd get better cause of the air fuel ratio is better
Think of it this way... during the winter time, it takes longer for your engine to warm up... during this "cold start" stage, the computer is dumping in huge amounts of gas to keep it running and to get it warmed up... thus the high idle at start up. In addition to that, when it is colder outside, you are correct, it does run better, denser air and all... but 9 times out of 10, that means better response and that means your foot is in the gas more whether you realize it or not.

john

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post #7 of 18 (permalink) Old 03-13-2005, 06:44 PM
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Quote:
Originally Posted by tbird96
anyone think that plugs, and a fuel filter would effect it that much?
Certainly couldn't hurt.

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post #8 of 18 (permalink) Old 03-13-2005, 06:50 PM
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cleaning the MAF is free, I'd start there. But tune-up's are always a good regular maintenance repair.
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post #9 of 18 (permalink) Old 03-13-2005, 07:25 PM
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I'd go with denser air making it run richer.
But maintance won't hurt.

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post #10 of 18 (permalink) Old 03-13-2005, 07:59 PM
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do you really think a "cold air intake" gets colder air than the stock intake does? Where do you think the stock intake takes air from? It's still taking in the same air. It won't run richer, or even if it does it will be in the tenths or even hundreths.

But the oil on the filters can get on the MAF sensor and throw it off.

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post #11 of 18 (permalink) Old 03-13-2005, 08:30 PM Thread Starter
 
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when I said colder air I didnt mean as in a cold air intake I was referring to the outside temp being in the 30's, but when I go home Im gonna throw so carb cleaner in the MAF, one of my buddies said that this fuel filter might be a more tricky replacement than some others. I havent had my bird for that long to replace it, anyone got some tricks?
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post #12 of 18 (permalink) Old 03-13-2005, 08:54 PM
 
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How-to manuals help a TON.
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post #13 of 18 (permalink) Old 03-13-2005, 10:03 PM
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The fuel filter is a very simple job on our cars. If you do a search, I'm sure you'll find plenty of info on replacing it.

-Rod

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post #14 of 18 (permalink) Old 03-13-2005, 10:37 PM
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Quote:
it happens quite often in the winter... in the summer time I get about 26-29mpg
Sort of off topic but I knew it. I argued with my dad for about an hour one day last summer when I told him I got 25-26 mpg on a trip but I knew I was right.

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post #15 of 18 (permalink) Old 03-15-2005, 08:11 PM
 
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The cold air does ALOT. In the summer when the temp is in the 15-25 C range I get about 22-23 city. When it gets to 10-30 below 0 it drops to about 20 MPG city.


Of course thats with a light foot. Which doesnt happen very often
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post #16 of 18 (permalink) Old 03-20-2005, 05:57 PM Thread Starter
 
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I put in new fuel filter, air filter, and replaced the plugs with some motorcraft plugs, I think this should do it. When I pulled out the old plugs there were tarnished pretty good with combustion residue. Anyone know what the original brand of plugs in these things, looks like when someone did a tune up they just replace wires because this plugs were worse than anything I've done before. Also, this thing was a PAIN to do plugs, would of been easier to pull the motor. Passenger side plugs the most forward one had me scratching my head for a while, any suggestions for my next tune up, or just grin and bare it?
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post #17 of 18 (permalink) Old 03-20-2005, 07:09 PM
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easier to pull the motor haha. Maybe on a supercoupe. You have it good my friend. Heck, I can change my plugs in 10-15 minutes. Swivels are your friend, as are extensions. And a spark plug socket. The original plugs are motorcrafts.
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post #18 of 18 (permalink) Old 03-20-2005, 09:33 PM Thread Starter
 
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yea I need to buy a swivel, I have all the extensions I need in 1/4, 3/8 and 1/2, but damn I was cursing the fact that my car was apart and didnt have a swivel, and its too damn cold to take out the bike, and get a swivel at sears. I had grease up to my elbows and scratches, tomorrow when i return some sockets Im going to get a swivel in 3/8, and 1/2.
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