1991 325i throttle body

[bluff467]

Hi, I have just bought a 2nd hand throttle body, but the one on the car is slightly different.

the one on the car: there are two small ports, 1 being the port for the hose from the brake booster and the other is sealed.

New throttle body: both ports are open, what is the other port for? and what can I do to make it work?

Any advice would be much appreciated

Chris

Got the port sealed up, got it on, but seems be loosing power intermetently, could it be the tps?

[Jim320i]

Are they prefacelift and facelift throttlebodys?


If you say one is sealed, just put a cap on the end of it and install it the same setup as the original...

[Ant]

second port goes via the one way valve to the brake servo.

to use what yu now have, you need the double elbox servo to TB hose, common as much on 320/325 after '89 so maybe able to score from a breakers

alternative is block the "spare" vac port with an OEM elbow and short section of hose with a bolt in the end.

whatever you do needs to be safe and airtight .

HTH

[bluff467]

Hi, I have just bought a 2nd hand throttle body, but the one on the car is slightly different.

the one on the car: there are two small ports, 1 being the port for the hose from the brake booster and the other is sealed.

New throttle body: both ports are open, what is the other port for? and what can I do to make it work?

Any advice would be much appreciated

Chris

Got the other port sealed up and got it o the car bu on the test drive, drove great but then sudden loss of power and then all the power back again keeps doing this on and off, could it be the tps?