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  #1  
Old 06-10-2010, 11:03 PM
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Experts - Please Help - Im Fed up with this issue already!

In my other posts I mentioned that I have this annoying issue where whenever i hit the brakes my MPG jump to 8 and then when i come to a stop it goes back to normal at 40. Now this is the most annoying thing ever because whenever I feel this it has some sort of down shift reaction.

1. Transmission - Recently rebuilt fully - all new sensors and completely was rebuilt
2. MAF - Alot of people on the previous posts stated that it was the Mass Airflow Sensor, I went ahead purchased that for no reason since I just replaced it and still a no go. I feel my gears changing a LITTLE bit smoother but thats it, the MPG issue is still effected.


What else could be the reason? Please anybody! 02 Sensors? or something else? Please this is really annoying the crap out of me!

Thanks!
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  #2  
Old 06-11-2010, 08:17 AM
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Are you talking about the little MPG gauge needle? If so then that has no affect on driving/shifting and the gauge dropping down just before the vehicle stops is normal behavior. If the vehicle is downshifting rough at that moment it isn't caused by the gauge but something else.

So what is the actual issue you're having? Rough downshift?
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  #3  
Old 06-11-2010, 10:27 AM
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Well when i hit the brakes it comes to a little rough downshift and at the same time right after when i accelerate there is a bit of a delay.... where it takes a second or two until the acceleration kicks in
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  #4  
Old 06-11-2010, 06:37 PM
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Does the engine rev when it hesitates to accelerate?
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You make something idiotproof, they'll make a better idiot


You think professional is expensive, just wait until you pay for amateur.

Never let your sense of morals prevent you from doing what is right.

Examine what is said, not who speaks.

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RIP 4.6is.....

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  #5  
Old 06-11-2010, 06:43 PM
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Quote:
Originally Posted by Weasel View Post
Does the engine rev when it hesitates to accelerate?

Not that I can tell, and overall since i changed the MAF ive noticed that there is a delay in general now, whenever the X is at a stop and i accelerate its just a 2 second delay from the time i hit the gas pedal until the X actually moves....
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2. Weathertech Window Guards
3. eBay/Sony Rear DVD Players
4. JVC NX7000 Navigation System

NOTE: IF anyone likes these mods and needs some help with installing them on their X5s, please feel free to PM me, I am more then happy to help!
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  #6  
Old 06-11-2010, 06:47 PM
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Does it matter if you're in sport vs manual? I take it the engine still revs normally in neutral/park... Also, did you get OEM airflow sensor or aftermarket?
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"When you do things right, people won't be sure you've done anything at all" (Bender, futurama)

You make something idiotproof, they'll make a better idiot


You think professional is expensive, just wait until you pay for amateur.

Never let your sense of morals prevent you from doing what is right.

Examine what is said, not who speaks.

X5 pics

RIP 4.6is.....

2003 4.6is
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  #7  
Old 06-11-2010, 07:02 PM
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Sport or manual it does the same thing. and yes i got the oem bosch maf.
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Some Of My Mods In Text:
1. Depo Headlights
2. Weathertech Window Guards
3. eBay/Sony Rear DVD Players
4. JVC NX7000 Navigation System

NOTE: IF anyone likes these mods and needs some help with installing them on their X5s, please feel free to PM me, I am more then happy to help!
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  #8  
Old 06-13-2010, 04:16 PM
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Could the hesitation be the hydraulic delay on the transmission?
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  #9  
Old 06-14-2010, 01:56 AM
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Any answers for this issue? Its not as bad but still its a very annoying thing to have while driving the X....
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Some Of My Mods:


Some Of My Mods In Text:
1. Depo Headlights
2. Weathertech Window Guards
3. eBay/Sony Rear DVD Players
4. JVC NX7000 Navigation System

NOTE: IF anyone likes these mods and needs some help with installing them on their X5s, please feel free to PM me, I am more then happy to help!
Reply With Quote
  #10  
Old 06-14-2010, 08:25 AM
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With issues like this one needs to feel it/experience it to make any proper diagnoside. Just thought of something, what year is your X?
__________________
"When you do things right, people won't be sure you've done anything at all" (Bender, futurama)

You make something idiotproof, they'll make a better idiot


You think professional is expensive, just wait until you pay for amateur.

Never let your sense of morals prevent you from doing what is right.

Examine what is said, not who speaks.

X5 pics

RIP 4.6is.....

2003 4.6is
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