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Old 03-30-2015, 07:16 AM   #1
Mesa Boogie Lover
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how many hours labour for CCV and VVT stepper replacement?

Hi guys

My car is really sluggish and has a very rough idle. Also over revs a lot when going up hills.

Had the cam sensors replaced, the MAF replaced and the Crankshaft sensor replaced as well. Car rides better now but still sluggish. Put some Nulon Total Fuel System treatment in and the car got a bit better. Oil was flushed and new oil put in by mechanic as well. Mechanic tells me no codes are appearing.

From reading posts here, it seems my next steps may have to be having the CCV and VVT stepper motor replaced. I'm trying to understand how many hours of work it should be for a mechanic to replace these two, or rather I'm trying to understand roughly how much it should cost me to have them replaced.

Any ideas would be so appreciated as I'm just stumped and this N42 motor is just killing me with cost and no power.

Last edited by Mesa Boogie Lover; 03-30-2015 at 07:17 AM.
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Old 03-30-2015, 08:08 AM   #2
E46 Coupe
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N42 is no super car engine don't get too upset.
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Old 03-30-2015, 08:11 AM   #3
Mesa Boogie Lover
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I get that but this car is truly unwell. To take off at the lights takes a good 2.5 seconds for it to start moving. My sister has 2 year newer model of my car and it is twice as powerful.
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Old 03-30-2015, 08:49 AM   #4
Rajvosa
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im guessing the mechanic you are using is a bmw specialist and has the correct diagnostic equipment? might be worthwhile getting a dealership to read the codes?
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Old 03-30-2015, 09:09 AM   #5
Mesa Boogie Lover
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Well perhaps the dealership code reading is my next step. Just worry about being burnt by them but accept at some point it may be throwing good money after bad if I am avoiding their ability to use correct equipment.
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Old 03-30-2015, 09:36 PM   #6
bumpgums
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valvetronic motor is 2 nuts once the cam cover is off, the worm gear turns out of the eccentric shaft sensor.
Can be done in 1.5 hours- 3 hours depending whos doing it. Then re-learn the valvetronic learnstops and reset adaption values.
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Old 03-30-2015, 09:45 PM   #7
bumpgums
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Being a N4X series car,have you had the cam cover off and inspected? usually poor maintenance will show a sludged up motor,which will obviously make it hard for the valve gear esprcially the eccentric shaft and motor to turn/adjust correctly
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Old 03-31-2015, 12:56 AM   #8
Mesa Boogie Lover
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I hadn't thought of sludge. Maybe that's something I might look at tonight.

If there is a huge sludge buildup, does engine flush from Wynns etc really get rid of the problem or is it something that the engine is just stuck with?
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