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E85 / E86 Z4 (2003-2008)
E85 Z4 Roadster, E86 Z4 Coupe, E85 Z4 M Roadster, and E86 Z4 M Coupe talk with our BMW gurus here.

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  #1  
Old 12-02-2012, 04:15 PM
dgomez89 dgomez89 is offline
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Mein Auto: 325ci
Please help all put of ideas!!!

I have a 2003 Z4 2.5. The car will idle fine when first started then Shortly after idling it will fluctuate and all sorts of misfiring when accelerating, mostly at low rpms. I have changed spark plugs. All the coils are good, all fuel injectors are good. Camshaft sensor exhaust and intake are good and the solenoid (for the vanos) seems to be working fine ill less I tested it wrong. I have the fault code p0010 camshaft position actuator bank one. Any advice I am out of ideas
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  #2  
Old 12-02-2012, 05:07 PM
Droptop85 Droptop85 is offline
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Have you replaced the cam sensor? You said it's good but the code is for a faulty cam sensor
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  #3  
Old 12-02-2012, 05:09 PM
dgomez89 dgomez89 is offline
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Why wouldn't the test show that it is bad? That's why I haven't replaced it.
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  #4  
Old 12-02-2012, 05:24 PM
Droptop85 Droptop85 is offline
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What method did you use to test it? Also make sure all connectors are tight and clean. I'm sure you have already. Also. What kind of gas are you running?
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  #5  
Old 12-02-2012, 05:30 PM
dgomez89 dgomez89 is offline
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Always go with premium and used the techron fuel cleaner. Used a multi meter by back probing the signal wire and going over it with a wrench to make sure it is reading correctly
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  #6  
Old 12-02-2012, 05:34 PM
Droptop85 Droptop85 is offline
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Well this is frustrating. Check your fuel psi it almost sounds like low fuel psi.
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  #7  
Old 12-02-2012, 05:40 PM
Droptop85 Droptop85 is offline
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http://www.harborfreight.com/fuel-in...ter-92699.html

And it's on sale! You should be at 5 bar +-.02
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  #8  
Old 12-02-2012, 07:27 PM
dgomez89 dgomez89 is offline
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Why would that P0010 code come up then?
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  #9  
Old 12-02-2012, 07:42 PM
Droptop85 Droptop85 is offline
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Here's what I found regarding code p0010

A code P0010 may mean that one or more of the following has happened:

Faulty oil control valve (OCV)
Open or short in the VVT/VCT circuit
Open or short in the OCV / solenoid valve
Damaged computer (PCM)
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  #10  
Old 12-02-2012, 07:43 PM
Droptop85 Droptop85 is offline
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Since you've performed the tests already my guess is a short in a wire??
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  #11  
Old 03-21-2013, 02:36 PM
RCOBill1 RCOBill1 is offline
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Mein Auto: Z3 & 535X drive
Quote:
Originally Posted by dgomez89 View Post
I have a 2003 Z4 2.5. The car will idle fine when first started then Shortly after idling it will fluctuate and all sorts of misfiring when accelerating, mostly at low rpms. I have changed spark plugs. All the coils are good, all fuel injectors are good. Camshaft sensor exhaust and intake are good and the solenoid (for the vanos) seems to be working fine ill less I tested it wrong. I have the fault code p0010 camshaft position actuator bank one. Any advice I am out of ideas
Had a problem that sounds close to this, Air Mass Sensor going bad, started with missfire, backfire and went down hill from there what you posted. I also have a tester, 15K dealer test box works alot better, spend the money and see what they find..
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