Norcal: Need help with m42

[series88]

So I finally finished my engine swap. It's a same engine swap. My old engine was just kind of toast. So now that the new motor is in, it fires up but after about 5-10mins of idling, it starts getting rough and bugs down. When I turn the engine off and start it again, it will run fine for the same amount of time.

Any ideas?

I wanted to take the car down to bfest but it seems like it wont be happening :(

[freeride53]

Check for vaccum leak(s) and make sure your spark plugs are installed properly.

[series88]

^spark plugs are ok. That's the first thing I checked. Still searching for vacuum leaks

[series88]

Anyone in the bay area willing to check it out? Car is in the Fremont area

[bmwm42]

make sure all your sensors are connected temp sensor oxy sensor. by the sounds of it your car is staying in closed loop mode.

[series88]

Will be checking that tom. Thanks for the advice:)

[series88]

btw: i got to solve the problem a while back. It was some plug in the harness that was not plugged in when we started the swap but decided to plug it in after. I unplugged it then it ran fine.


Got lots of oil leaks now though. Got to go through the whole thing again