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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Sun, Oct-03-2010, 12:25:41 AM   #1
Lee22
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Default where is there a DIY to change Fuel Injectors?

did some searching but couldn't find anything on how to change your Fuel injectors. a step by step and pics would be helpful.


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Old Sun, Oct-03-2010, 08:53:48 PM   #2
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No one, has info on this?
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Old Sun, Oct-03-2010, 11:11:26 PM   #3
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AA had instructions on their old website but just recently changed it. From memory I:

1. Gently take off the fuel rail from the injectors. Be careful not to pull out too hard.
2. Pull out retaining clips from each injector.
3. Gently wiggle out each injector.
4. Reverse steps with new injectors.

Be extra careful when installing the new ones. These can get damaged very easily from pushing on the fuel rail.
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Old Mon, Oct-04-2010, 03:44:43 AM   #4
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Oh man, the fuel injectors are a pain in the butt to do. M3anOne has outlined it correctly. Take your time prying the fuel rail off, and then removing the clips from the injectors.

I had written a bit out this procedure when I was doing mine:

http://m3forum.net/m3forum/showpost....6&postcount=28
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Old Mon, Oct-04-2010, 03:46:58 AM   #5
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Did any of your injectors fail?
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Old Mon, Oct-04-2010, 03:53:55 AM   #6
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If this question was directed to me, then no, my injectors didn't fail. I replaced them because I was in the process of installing my AA supercharger kit. The kit is supplied with bigger injectors.


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Originally Posted by Chris22 View Post
Did any of your injectors fail?
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Old Mon, Oct-04-2010, 09:35:59 PM   #7
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Quote:
Originally Posted by Chris22 View Post
Did any of your injectors fail?
my car started to misfire and i had to limp it back home. after checking the ignition coils and determining that they were not the problem i ran an OBD2 scanner and got this code.
.
the details of the problem are here with more pics http://www.m3forum.net/m3forum/showthread.php?t=336301




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Old Mon, Oct-04-2010, 10:38:55 PM   #8
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"injector circuit open". i had that error before. my wiring harness was loose where it connected to the injector. i used a screwdriver and widened the prongs a little bit so they fit snug into the injector, problem gone.
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Old Tue, Oct-05-2010, 02:09:14 AM   #9
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Quote:
Originally Posted by azndrunk74 View Post
"injector circuit open". i had that error before. my wiring harness was loose where it connected to the injector. i used a screwdriver and widened the prongs a little bit so they fit snug into the injector, problem gone.
Hrmm, I'm gonna check that when I get home
before trying to replace an injector. Thanks for that info bro
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Old Tue, Oct-05-2010, 04:07:36 AM   #10
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Quote:
Originally Posted by Lee22 View Post
Hrmm, I'm gonna check that when I get home
before trying to replace an injector. Thanks for that info bro
no problem. i had actually replaced the injector thinking it was bad but the problem was still there. after fixing the prongs in the harness, the issue went away. good luck!
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Discussing where is there a DIY to change Fuel Injectors? in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)