maxitoman007
Member
- Joined
- Feb 15, 2017
- Location
- Calgary, Alberta, Canada
So recently my modified 87 740 turbo began doing this under boost. It happens more so at higher loads (which is almost all the time because my volvo is lifted on 33s) however I can rarely even get a 1st gear (CD009) pull without some backfiring. It is worse at WOT as opposed to trying to build boost at moderate throttle.
Up until today I had several cracks in my stainless turbo manifold and I thought those could be causing the issue. I had those all TIGed up today and on the drive home it was still happening.
Here is a video for reference. This was in third gear (CD009) trying to build boost around WOT tonight after the manifold had been repaired:
https://imgur.com/gallery/Vvw0xJK
I am trying to figure out what could be causing this issue. Have any of you seen anything like this before?
knock sensor pulling timing? (I recently installed an MSD 6a box which actually seemed to change the tone of the engine sound, possibly tripping the knock sensor?)
bad MAF?
Bad base Timing?
Too rich?
should I try retarding cam timing? (I have an IPD turbo cam with adjustable cam gear set straight up)
Thanks in advance.
Up until today I had several cracks in my stainless turbo manifold and I thought those could be causing the issue. I had those all TIGed up today and on the drive home it was still happening.
Here is a video for reference. This was in third gear (CD009) trying to build boost around WOT tonight after the manifold had been repaired:
https://imgur.com/gallery/Vvw0xJK
I am trying to figure out what could be causing this issue. Have any of you seen anything like this before?
knock sensor pulling timing? (I recently installed an MSD 6a box which actually seemed to change the tone of the engine sound, possibly tripping the knock sensor?)
bad MAF?
Bad base Timing?
Too rich?
should I try retarding cam timing? (I have an IPD turbo cam with adjustable cam gear set straight up)
Thanks in advance.