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#11
04-30-2013, 08:23 PM
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Cleaning the throttle body looks pretty easy. I have not noticed any cracks in the hoses but I'll check and report back. That would be an easy fix vs replacing the throttle body ! Dave. 
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#12
04-30-2013, 08:40 PM
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And at the end of the day I might be very wrong, and it could be your throttle body.
Thankfully drilling down potential problems sometimes offers you a chance to do a little more for your peace of mind later on. Before you take that intake hose off the TB, order that hose if you haven't replaced it. I'll post a picture of mine sometime and you'll see why! Other things to consider are your air filter, and using maf cleaner on your maf (specific chemical not brake cleaner!). I was thrilled with the in town mileage achieved after doing these! Won't tell you how bad my air filter was though... :O
__________________
2006 e53 4.8is Imola / Cremebeige 2005 e53 3.0 Black / Truffle - AT, Sport, Premium, ZCW 2001 e39 M5 Black / Caramel - Extended Leather, Premium Audio
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#13
04-30-2013, 08:49 PM
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the air filter was probably as bad as mine ! That I know, just never suspected that these things could produce that code.
I've got some cleaning to do ! ps -- the car has 260,000 miles on it and I am wary of spending money unnecessarily. That said, I'll do much to keep it on the road myself but dealer charges would quickly dwarf the existing value of the car. Dave.
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#16
05-05-2013, 05:11 AM
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Well, yesterday I replaced the two pre-cat O2 sensors (I was getting a consistent code on one), changed the thermostat (was leaking a little) and water pump (pm) and put in a new air filter and cabin filter. The first couple of engine starts after that and the 76 sensor code DIDN'T SHOW UP ! It never failed to come on before !
Today is a new day. I've got some errands to run ... will the code show up again ? Perhaps the new filter allows the engine to "breathe easier" and it's not sucking air in from some miniscule crack after the MAF ? Fingers crossed ... Dave.
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#18
05-06-2013, 09:13 PM
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No, it was a combination of everything. If your o2 was shot, I believe we default to rich, so too much air, which pisses off other stuff. The thermostat also is a clear fix. Your gas mileage was probably pretty terrible no?
__________________
For Sale Thread: http://www.xoutpost.com/classifieds/...ia-bridge.html 2004 X5 3.0i - Sold 1998 328i Convertible (e36) -sold 2004 325xi (e46)- sold Any questions?: DICE mediabridge|gauge rings|LED Angel Eyes|front door carrier|GT1/DIS/INPA/NCS|bluetooth retrofit|SIRIUS Retrofit|fuel filter|Dorman DISA|Roof Rack Delete|Sunroof drains|AC drains|rear sway bar swap|o2 sensors|VCG|Osram Night Breakers
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#19
05-07-2013, 05:02 AM
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The code didn't disappear with the replacement of the pre-cat O2 although it wasn't as consistent.
I had some leakage from the thermostat seal with the engine body and decided to replace it and the water pump at the same time. It wasn't leaking much coolant -- perhaps a cup every 2 months -- I don't think that the thermostat was related. Gas mileage was down a little, I think. It will be interesting to see how it changes with a long trip that we're doing next week.
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