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Old 07-01-2011, 02:19 PM   #1
Wickedly
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Question Fuel Poblems

Hi,

I been looking at the forums and trying to find a solution for a problem like mine and I haven,t yet I found some threads that sounds very similar.

2003 (e46) 325i,

Currently, I'm having problems with my AC, just giving me hot air and not cold air at all. I know is not refill because I took it to get it refill and they did it and check for leaks and said It was all perfect, yet the ac still failing.
But my current problem is my fuel, Today I went to fill my tank. so I fill it all the way and than when I go back into my car, my fuel gauge was on half...so I got really worry. Turn the car off for couple of minutes than turn it back on and it went all the way full. but my mileage was around 140... and i know is supposed to be around the 300.




I haven't change my fuel pump or filter at all.

I have found this threads.
http://forum.e46fanatics.com/showthread.php?t=847198
http://forum.e46fanatics.com/showthr...ight=fuel+pump

Also now when I drive, the miles go up instead of be going down
very confusing....
check my video as well...
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Old 07-01-2011, 06:13 PM   #2
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Old 07-01-2011, 07:49 PM   #3
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If your level sender had failed, as they do, your fuel gauge wouldn't be accurate all the time. Many here think they have a 1/4 tank when they have none.

You evidently thought you were filling a full tank when it was only half empty...if I understand you correctly.

Just use your mpg as a guide and fill up way before your gauge says your empty...or search for the diys on cleaning it...some have successfully got it working again. Not sure how much it costs, but failing that, it's an easy diy so I read--haven't needed to mess with that yet as the PO had already been down there...but my day is a coming, no doubt!

On AC...there are other things it could be--like the compressor clutch...a really horribly clogged cabin air filter, stuck vents, failed compressor. I've also read of stuck open heater valve, so you've got AC competing with the heat (that'd be low odds, I think...just recall one mention of it).
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Old 07-01-2011, 07:52 PM   #4
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Change your filter for sure..I did mine with only a little fuel on my face. I only get about 240 in a tank, but that's because I still have other things to do :/ The (excuse me I forget the correct term) fuel level sensor must be faulty if your miles left and fuel dial are jumping around.

Also did you take it to an a/c specialist?(ie: when they refilled your refrigerant, was it with 3 hoses and a real gauge or that cheap refill hose you can buy at the store) Cause your compressor could be shot, have blockage somewhere, something wrong with the air ducts, or the the control unit itself may not be functioning
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Old 07-01-2011, 10:46 PM   #5
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If your level sender had failed, as they do, your fuel gauge wouldn't be accurate all the time. Many here think they have a 1/4 tank when they have none.

You evidently thought you were filling a full tank when it was only half empty...if I understand you correctly.

Just use your mpg as a guide and fill up way before your gauge says your empty...or search for the diys on cleaning it...some have successfully got it working again. Not sure how much it costs, but failing that, it's an easy diy so I read--haven't needed to mess with that yet as the PO had already been down there...but my day is a coming, no doubt!

On AC...there are other things it could be--like the compressor clutch...a really horribly clogged cabin air filter, stuck vents, failed compressor. I've also read of stuck open heater valve, so you've got AC competing with the heat (that'd be low odds, I think...just recall one mention of it).
I think you understood wrong, when I went to fill my tank, my tank was empty, the red light was on saying it was empty. I believe I would probably only had like 20miles to go or less. So at the moment, I decided to fill my tank all the way. putting 60 dollars. And I believe it fill up all the way, is just the mpg only stood to half of what a full tank is, and as I drive it more and more, it keeps going higher and higher instead of lower. I know you say something about a diy on cleaning it, but what exactly do I need to clean? Could you lead me to the right diy please. I would really appreciate it.

and About the AC. I feel so screw because It was working but it seems that is has gotten worse n worse over the period of time to the point that now it only gives me hot air.
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Old 07-01-2011, 10:57 PM   #6
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Change your filter for sure..I did mine with only a little fuel on my face. I only get about 240 in a tank, but that's because I still have other things to do :/ The (excuse me I forget the correct term) fuel level sensor must be faulty if your miles left and fuel dial are jumping around.

Also did you take it to an a/c specialist?(ie: when they refilled your refrigerant, was it with 3 hoses and a real gauge or that cheap refill hose you can buy at the store) Cause your compressor could be shot, have blockage somewhere, something wrong with the air ducts, or the the control unit itself may not be functioning
To change the fuel filter which I believe is this one right
http://bimmerinfo.com/diy/fuel-filter/

http://www.autohausaz.com/search/pro...@Fuel%20Filter

And Do you know what's the product number for the fuel level sensor? I keep looking for it but I can't find it.
And I did took my car an specialist, where there was 3 hoses and a real gauge. I would hate to use the cheap can they sell at the stores on my car. And he did refill it and told me there wasn't any leaks or anything like that, but what he did told me is that there might be a problem with the electrical part of the AC that might be making one side colder than the other one, since that was the initial problem. time pass and now neither of them are giving me cold air. But I will check my AC as soon as I'm done fixing the fuel problem. Thanks for your advice.
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Old 07-01-2011, 11:05 PM   #7
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I think you guys mean this right http://www.pelicanparts.com/cgi-bin/...9%2C%20Each%20

That's the fuel pump which comes with the sensor..

as this diy shows http://www.pelicanparts.com/bmw/tech...-Fuel-Pump.htm
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Old 07-01-2011, 11:07 PM   #8
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or this .....
http://www.pelicanparts.com/cgi-bin/...9%2C%20Each%20

so confuse.....

Are there 2 sensors. one on each side of the back seat?? Which do I have to change? Left or right?

Last edited by Wickedly; 07-01-2011 at 11:08 PM. Reason: adding more
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Old 07-02-2011, 05:01 AM   #9
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Try searching under title search...fuel level sender.

The one that 'feeds' the gauge is on the left side of the tank. The one on the right is the fuel pump with another level sender (so the tank can periodically balance itself, but that sender doesn't send info to the fuel gauge in cluster according to everything I've read...and I read a lot here, so I sure hope I'm right!)

If you can't find the diy for repairing it, come back...it's around here someplace...maybe in the diy forum.
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Old 08-05-2011, 10:27 AM   #10
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Hmm...thanks for that tip, Doug! About to tackle this, I figured I was going to have to clean everything.
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Old 08-05-2011, 10:39 AM   #11
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Hmm...thanks for that tip, Doug! About to tackle this, I figured I was going to have to clean everything.
Hey, I didn't give you any tips...that was for OP!

No smoking, Albeee! Keep smokers away! Have bucket handy to put fuel soaked things in.

You know I've never done this, btw, so what I've said here is all fanatics lore...please make sure you don't just blindly accept my word...you've met me, you 'know' I'm an idiot...also human!
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Old 08-05-2011, 10:45 AM   #12
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LOL! I've taken this apart ages to ago to mess with the sucking jet pump, but not the sender. Didn't know which one was which, at least now I know I only need to take out the one on the left side.

I don't know about the "idiot" part...but you definitely caught me off guard!
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Old 08-05-2011, 10:48 AM   #13
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LOL! I've taken this apart ages to ago to mess with the sucking jet pump, but not the sender. Didn't know which one was which, at least now I know I only need to take out the one on the left side.

I don't know about the "idiot" part...but you definitely caught me off guard!
Because of my age, incredible swavness, or something else? Was it the Crocs? Hmmm? Maybe you should answer through PM, just in case!

Just make sure you're facing the front when determining the left side!

Have fun. Oh, don't use a hair dryer either!
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Old 08-05-2011, 10:50 AM   #14
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Hmm, I'd have to check my notes on that one, haha.

Yep, figures.
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