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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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#1 |
<insert funny quote here>
Join Date: Jul 2009
Posts: 160
In the garage:
Reputation: 0
![]() Location: Manitoba
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it all started after a trip to calgary and edmonton and back to winnipeg last summer. When I got home the engine sounded very ‘ticky’ so I opened it up and checked the valves. A lot of them were out of tolerance, so I adjusted them. I did not remove the VANOS to adjust the valves.
Once I put it all back together, did an oil change and started it up, I got a code - Exhaust camshaft position sensor. The symptoms were quite intense when I started it up - pushing the gas pedal resulted in a ‘bog’ of the engine before climbing in revs. It did not stall and it idled fine. So I replaced the sensor and started it back up. Once again the car idles fine, seems to climb in revs fine. I took it for a drive yesterday to try to go through a drive cycle with it. The car feels sluggish (like not as fast as my Focus ST), granted I haven’t driven the Bimmer since last August and they are two different cars with different characteristics. The Bimmer just feels slow now. no ‘bogging’ when I hit the gas pedal, but not that ‘throw you back in the seat’ feeling I remember it having last summer. AND there are codes remaining! It’s showing: B9 - Function Exhaust VANOS OF - Camshaft sensor synchronization to camshaft OA - Signal, camshaft sensor, exhaust For reference: I have the BEISAN solenoid, and have done all the VANOS lock downs there are. I have headers, no cats, and a FSTT tune. I have deleted the SAP, but still sometimes pop a code for it. Do I need to time the engine? Should I check the VANOS, even though there is NO WAY that there should be anything wrong with it? What’s going on?? Thanks in advance…
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Great story. Compelling, and rich. (As said by Mr. Ron Burgundy) |
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#2 | |
Registered User
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If the tool shows a good, consistent camshaft position reading, but the Vanos test shows your exhaust cam didn't move at all, you probably need to clean out the valve body and/ or get a new solenoid from Raj. |
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#3 |
Registered User
Join Date: May 2015
Posts: 21
Reputation: 0
![]() Location: Vancouver, BC
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Run the Vanos test on DIS, it helped me pinpoint a similar problem.
My similar problem although on the intake side ended up being the valve body, it must have gotten plugged while I was doing the 'cleaning' procedure. Never could get it clear again. Replaced Valve body and 100%. |
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#4 |
<insert funny quote here>
Join Date: Jul 2009
Posts: 160
In the garage:
Reputation: 0
![]() Location: Manitoba
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Well, life has a habit of getting in the way of me and my M3.
I had a friend do some tests on the car and he suggested that the exhaust cam was retarded. I opened the engine back up and checked it and sure enough that cam was way out of time. I fixed that, timed the top and bottom. When I put it back together I cleared the codes, went for a drive and it felt better. No codes came back. The next morning I went to drive it to work and the codes popped up right away. Same codes as before. Now when I stab the throttle it still has a bit of hesitation. Not as bad as before, but noticeable to me. I haven't had time to run the DIS VANOS test yet, but I guess that is my next step. At least now I know that the engine is timed properly. I will update when I have the VANOS test completed.
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Great story. Compelling, and rich. (As said by Mr. Ron Burgundy) |
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camshaft position sensor, codes, timing, vanos |
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