seafoam... where to introduce?

[Kibokojoe]

Would like to try seafoam on a m30 1991 735i. Was thinking of using the brake booster line on intake manifold. Anyone ever tried this stuff and where did you inject it?

[genphreak]

I've heard that is a good place others have used, however this is not the easiest fastener to remove, it is one of 'BMW's permanent stainless fittings'. Not much choice otherwise, I wouldn't want to run it through the Throttle Body...

[ryan roopnarine]

the vacuum hose that connects to the fuel pressure regulator works well for this, if you wanted to use seafoam or decarbonizer.

[Kibokojoe]

Where would I find the fuel pressure regulator vacuum hose?

[ryan roopnarine]

It should be the smallest diameter hose that goes into the fuel pressure regulator. It probably won't have any kind of hose clamp on it.

http://paulaxford.com/bmw730i/images/eng_sensors.jpg

[Bill R.]

None of the above choices really work well since liquid will follow the path of least resistance, one intake runner will get most of the fluid. If you insist on using it i would put it into a spray can like you get at grangers and then introduce it into the throttle body in a mist form. Otherwise i would run it straight into the injectors through the fuel line , but i still prefer bg44k for the best results.

[shogun]

Bill, why do you always recommend something I have to buy then ;-)

They even have a flushing 'apparatus' and other stuff
http://www.bgprod.com/products/fuelair.html