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Old 12-07-2012, 10:20 AM
Leekay07 Leekay07 is offline
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Location: Stillwater NY
Join Date: Jan 2012
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Mein Auto: MY12 550I,MY09 X5.
Originally Posted by DSXMachina View Post
Well Leekay, we're jumping the gun a little to say it's carbon fouling when the problem was identified as a bad injector. No doubt you may be right, but calling the dealer wrong, without evidence, isn't the right way to go.

Does it only happen on days when temps are below 37.

The dealers have a terrible way of diagnosing this issue and I have the bills to prove it and not from just one shop.

Here is how I showed it to the dealer besides the SES light.

Once you have your injector replaced find a stretch of road with 55-65 limit and if your in a Auto the best way to make it show its ugly head is to get to 25-30mph and then put the selector in to manual override and put the car in 5th gear. Now gas it as much as you can without hitting the last 1/3 of the travel (forces the car to wide open throttle in the current gear). Beyond this point tells the car to change down to the lowest possible gear. Keep it pegged till you feel its unsafe. You should experience some stutter / hesitation at this point.

Take the car back and ask them to service the intake valves. If you don't tell them they will run diagnostics and end up costing you a hell of a lot more.

If you do have a bad injector this would not cause the misfire. It just means it leaks and there is no way on earth a leaking injector causes your car to misfire when its cold.
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