Last year when I replaced the chain guides, vanos and all that stuff I wanted to make sure the injectors were cleaned as well. So, I took them to a local place for a rebuild. I was under the impression that the shop didn't have the right filters or o rings. They gave me a piece of paper with the before and after test results but I wasn't convinced they used the right stuff. I remember the injector filters were different than the original but they said that wasn't a problem. Anyway, after I put everything back together the car seems to have a starting problem which lately I narrow it down to a leaky injector. I cannot find anything with INPA or GT1. I suspect one or more injectors leak when the fuel is under pressure and it has hard time to start while warm after running for a while. In the morning starts very well. I think the mixture is too reach due to dripping in the cylinder and after a few cranks starts but with a smell of gas.

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4.8is 2004 imola red
4.8is 2005 Black on Black - DINAN/2 sold
4.4 2004 X5
2003 330xi
2008 328xi - sold
4.4 2000 X5 - sold