1995 BMW M50 Surging idle while stoped

Tiny
CRAZYALF
  • MEMBER
  • 1995 BMW M50
  • 2.5L
  • 6 CYL
  • RWD
  • MANUAL
  • 150,000 MILES
The car is a 1987 325is with a 95 m50 swap. I did not perform the swap and bought it with this issue. The current things that have been replaced are Mass air flow, intake hose, ICV 2 times and supposedly vacuum lines were checked. The person I bought it from says that his mechanic was 95% sure it was because of the 02 sensor. I find it hard to belive that it would surge from 800rpm to 2500rpm only while not moving because of that though. I am stumped and would appreciate the help!
Thursday, August 13th, 2015 AT 4:37 PM

2 Replies

Tiny
DOCHAGERTY
  • MECHANIC
  • 9,603 POSTS
There is something in the ICV or there is a vacuum leak
Was this
answer
helpful?
Yes
No
Monday, August 17th, 2015 AT 8:16 AM
Tiny
DOCHAGERTY
  • MECHANIC
  • 9,603 POSTS
I meant the ICV driver
might try smoke testing the intake for leaks
might try another DME too
I will repost if I can think of anything else
Was this
answer
helpful?
Yes
No
Monday, August 17th, 2015 AT 8:18 AM

Please login or register to post a reply.

Related Engine Surge Content

Surging
GUIDE
Surging
An engine or motor surge is caused by an imbalance in the computer system which cannot be corrected within the parameters of the vehicle's operating program, in other...