The stuff that builds up on the current direct injection valves (at least in the BMWs) is a goopy, semi -solid tar-looking substance about the consistancy of dum-dum. i'm pretty sure that it's just solidified oil. And if the car is regularly driven for a long enough time, the oil vapors and the valve get hot enough to keep the goop from gathering on the valve. But once it gets started, it probably collects exponentially.
The problem comes from a layer of the oil contacting the hot valve that gets burnt and caked on and then will not simply come off. That is why it ends up building up instead of cleaning off everytime the engine reaches operating temperature.
Going into my TENTH YEAR of providing high quality reproduction BMW fabrics!
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Going into my TENTH YEAR of providing high quality reproduction BMW fabrics!
PRICE CUT on ALL FABRICS
Offering the best prices on the best quality reproduction fabrics!
1991 BMW 325i(Current Daily) (S52)
I have carburetors, and I'm not afraid to use them!
There are always other fish (engines) in the sea (Craigslist)
Life is about enjoying the engine you are sitting behind.
Lexus solve she problem by running two sets of injectors.
Audi/Porsche had this problem years ago. I'm honestly surprised there is not a better solution to this problem yet.
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Let me get this straight... You are swapping out parts designed by hundreds of engineers that get paid thousands of dollars for something you bought at Pep Boys because your buddy who doesn't have a job told you it was 'better'?!?
High revving NA engines is the solution.....
I never said anything about DI or turbos.
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