Problem with BMW running rough, may need service shop
I am new to the forum. I am looking for a BMW shop that can do a diagnostic on my car. I live on Long Island (New York)
Here is a little run down of what's happening.
I start the car and drive for 5 to 10 minutes and the car runs fantastic, after around 5-10 minutes the car losses power and runs very rough. I can still drive how ever I have significant loss of power, if I try to give it gas it seems to bog down, from a dead stop it may stall it may not.
I have researched this problem and found many people on this and other forums stating the same issue and replacing part after part with no resolution. I now find myself in the same boat.
To start I ran the BMW on board diagnostic and I received a 1444 code which should mean no error reported similarly I never receive any check engine lights.
I tested the crank and cam sensor with an Ohm meter, the Ohms readings on both were below the minimum they should be according to the Bentley service manual, so I replaced them. I have also replaced the fuel filter, air filter and spark plugs (with Bosch +4 platinum's as per the service manual). I have checked and replaced every required fuse. I have also cleaning the MAF sensor, ICV, and upper intake manifold.
This has not resolved the issue and I don't want to go any further without better understanding the problem. If anyone has had this issue or knows of a BMW service station I can get diagnostic's performed it would be greatly appreciated.