TurboSpider
Proven Member
- 223
- 16
- Nov 2, 2015
-
York,
Pennsylvania
I just completed my small 16g turbo swap. I added 1200cc injectors, aftermarket AFPR, Walboro 255 and rewired fuel pump, CXracing FMIC, megan racing downpipe, ported o2 housing to match downpipe. I am running speed density with the IAT sensor mounted on the throttle body elbow. I set the fuel pressure to 42.5 with the vacuum line unplugged and the car idling. I went into DSM link and put in 1200 CC injectors and it calculated the dead time and global and I set it to what it recommended. My issue is that the car will start up and run for a few seconds and then die. It seems like its not idling correctly when it is running. My LC2 gauge is showing 22.3. If I unplug the vacuum line from the AFPR the air/fuel mixture goes down to 10. something and the car will actually idle and stay running but wont rev up, I guess because the vacuum is disconnected.
Let me tell you how I ran my vacuum lines when I did the swap because I am not quite sure I did it right. I have read lots of posts on here but none of them detailed where the vacuum lines went. I ran a large hose from the intercooler pipe (right below j pipe there is a larger nipple) The nipple is larger then a vacuum line so I used a 90 degree elbow fitting that fit over and put a small rubber hose into the elbow and ran that to a T. One end of the T goes to the wastegate. The other goes to the boost control solenoid. I was able to rev the car up and hear it build boost and blow off like it should so I think everything is ok here.
For the FPR, I disconnected the old FPR and connected the vacuum line that went to the old FPR to the new FPR. I even did try bypassing the fuel pressure solenoid by unplugging the vac hoses from that and just running a line from the intake to the FPR itself. It made no difference in idle.
I replaced all turbo and manifold gaskets with new ones. Everything is tight. Intercooler piping is tight. I did not do a BLT, I will when I get home.
I did disconnect the battery when I was doing the fuel upgrades but I don't think i Have to recalibrate the LC2 wideband sensor, I thought it stored it when the battery was removed. Any suggestions what may be causing this very lean idle?
Let me tell you how I ran my vacuum lines when I did the swap because I am not quite sure I did it right. I have read lots of posts on here but none of them detailed where the vacuum lines went. I ran a large hose from the intercooler pipe (right below j pipe there is a larger nipple) The nipple is larger then a vacuum line so I used a 90 degree elbow fitting that fit over and put a small rubber hose into the elbow and ran that to a T. One end of the T goes to the wastegate. The other goes to the boost control solenoid. I was able to rev the car up and hear it build boost and blow off like it should so I think everything is ok here.
For the FPR, I disconnected the old FPR and connected the vacuum line that went to the old FPR to the new FPR. I even did try bypassing the fuel pressure solenoid by unplugging the vac hoses from that and just running a line from the intake to the FPR itself. It made no difference in idle.
I replaced all turbo and manifold gaskets with new ones. Everything is tight. Intercooler piping is tight. I did not do a BLT, I will when I get home.
I did disconnect the battery when I was doing the fuel upgrades but I don't think i Have to recalibrate the LC2 wideband sensor, I thought it stored it when the battery was removed. Any suggestions what may be causing this very lean idle?
