Porsche 1999 911 Cabriolet 996 Bank 1 Misfire
#16
PROBLEM SOLVED. Hey guys, thanks for all your help! I found the issue to be a leaking intake tube during my smoke test. It's strange the a leaking intake would only cause misfires in bank 1. Apparently Porsche states that leaks in certain points can affect only bank 1 or bank 2.
Solution: The leak ended up being on a tube connecting to my air oil separator. I ended up doing the smoke test to detect a leak, seeing a leak coming from somewhere in the driver's side rear engine. After removing my alternator and entire intake manifold I could see the cracked tube. It was here that I realized I could have accessed this tube from the bottom without removing anything (Dang I need a car lift . Anyway I attached a picture showing the leak and also a diagram to show the part that I need to replace. Also linked below is another thread with a very similar problem/fix
https://www.renntech.org/topic/39522...r-engine-work/
Solution: The leak ended up being on a tube connecting to my air oil separator. I ended up doing the smoke test to detect a leak, seeing a leak coming from somewhere in the driver's side rear engine. After removing my alternator and entire intake manifold I could see the cracked tube. It was here that I realized I could have accessed this tube from the bottom without removing anything (Dang I need a car lift . Anyway I attached a picture showing the leak and also a diagram to show the part that I need to replace. Also linked below is another thread with a very similar problem/fix
https://www.renntech.org/topic/39522...r-engine-work/
#17
Good Analysis! Congrats on the result and thanks for reporting back to the thread.
#18
Rennlist Member
Congrats on finding that leak !!!
That thing looks like it has been there for ages, now test the Crankcase Vent System with a Manometer to make sure the AOS is ok...
That thing looks like it has been there for ages, now test the Crankcase Vent System with a Manometer to make sure the AOS is ok...