Flapjack
Lunatic engine swapper
Hey everyone. Thanks for all the help in my other thread (cam position sensor problems), but now I'm experiencing another issue, so I'm starting a new thread.
I had a spun rod bearing back in 2013 and long story short... just recently got it all back together. I was unmotivated, had no time, and needed a break from it. MMR hooked me up and repaired the block, and I didn't get it back in the car until sometime last year. When it was all back together, I had tons of little issues that have been mostly resolved. The biggest one may not have been an issue, per se, but had to do with the types of lockouts I was using (two-piece set, from Rich Groh). I have no idea where those put the cam phaser advance, but I kept getting CPS errors. I ended up popping those out and putting the more typical Livernois ones in (locked out fully advanced).
Since starting the car back up, the passenger side (bank 1) has been running very rich. I have two widebands... one for each side, which has helped, but I still can't figure it out. On bank 2, the wideband idles at ~14.6, where it should. Bank 1 idles at anywhere from high 11s to low 13s... but usually at 12.5.
Here is what I've done so far to troubleshoot:
- Checked far and wide for vacuum and exhaust leaks. None found.
- Compression check. All cylinders within 1-2psi.
- Installed new O2s. No change.
- Checked for swapped O2s. Just as they should be.
- Checked for pinched wiring. None found. No extensions in use.
- Checked for ground outs on O2 wiring. None found.
- Tested injectors with 12v. Each clicked opened/closed cleanly.
- Inspected spark plugs. All look roughly the same. (pics below)
- Checked all intake manifold and injector o-rings with carb cleaner
- Datalogged/pulled CELs. Only P2196 found (logs below)
I'm at my wits end. It'll sometimes start and idle, but it's rare. Usually, it needs a lot of assistance (pedal to the floor), then needs 3000-4000 RPM for a good minute or so before it'll clean up. Blipping the throttle will make it dip down to 500rpm or so, and then it will (usually) recover. If I can get it to start and idle on its own, it'll run until I shut off the key... but it'll always be at ~12.5 AFR on the passenger side, and normal on the driver side.
I've taken some datalogs, and the only thing I can see weird is one of the O2 voltages seems to jump around a bit.
Not sure where to go from here. JP06GT had a similar issue, but didn't post the resolution. I PM'd him. Any ideas would be greatly appreciated.
Here's a quick rundown of my setup, though most of you are probably already familiar:
- 5.4L 3v MMR 1000 shortblock
- Rich Groh (RGR) heads and custom turbo cams
- Livernois lockouts / VCT removed (3v V10 block plates)
- JPC 3v Intake, customized for 5.4L
- GT500 throttle body
- TurboHP kit w/61mm billet turbos
- Lethal Performance triple 255lph fuel pump kit (return style)
- Bosch 160lb fuel injectors
- Autolite HT0 spark plugs
Here's a log from yesterday with Motorocraft O2 sensors:
http://www.cabuzzi.net/website/images/car/misc/P2196/P2196_Idle_Motorcraft.zip
Here's a log from today with NTK O2 sensors:
http://www.cabuzzi.net/website/images/car/misc/P2196/P2196_Idle_NTK.zip
Here's a pic of the spark plugs:
Here's a video of the car running (sounds pretty normal):
I had a spun rod bearing back in 2013 and long story short... just recently got it all back together. I was unmotivated, had no time, and needed a break from it. MMR hooked me up and repaired the block, and I didn't get it back in the car until sometime last year. When it was all back together, I had tons of little issues that have been mostly resolved. The biggest one may not have been an issue, per se, but had to do with the types of lockouts I was using (two-piece set, from Rich Groh). I have no idea where those put the cam phaser advance, but I kept getting CPS errors. I ended up popping those out and putting the more typical Livernois ones in (locked out fully advanced).
Since starting the car back up, the passenger side (bank 1) has been running very rich. I have two widebands... one for each side, which has helped, but I still can't figure it out. On bank 2, the wideband idles at ~14.6, where it should. Bank 1 idles at anywhere from high 11s to low 13s... but usually at 12.5.
Here is what I've done so far to troubleshoot:
- Checked far and wide for vacuum and exhaust leaks. None found.
- Compression check. All cylinders within 1-2psi.
- Installed new O2s. No change.
- Checked for swapped O2s. Just as they should be.
- Checked for pinched wiring. None found. No extensions in use.
- Checked for ground outs on O2 wiring. None found.
- Tested injectors with 12v. Each clicked opened/closed cleanly.
- Inspected spark plugs. All look roughly the same. (pics below)
- Checked all intake manifold and injector o-rings with carb cleaner
- Datalogged/pulled CELs. Only P2196 found (logs below)
I'm at my wits end. It'll sometimes start and idle, but it's rare. Usually, it needs a lot of assistance (pedal to the floor), then needs 3000-4000 RPM for a good minute or so before it'll clean up. Blipping the throttle will make it dip down to 500rpm or so, and then it will (usually) recover. If I can get it to start and idle on its own, it'll run until I shut off the key... but it'll always be at ~12.5 AFR on the passenger side, and normal on the driver side.
I've taken some datalogs, and the only thing I can see weird is one of the O2 voltages seems to jump around a bit.
Not sure where to go from here. JP06GT had a similar issue, but didn't post the resolution. I PM'd him. Any ideas would be greatly appreciated.
Here's a quick rundown of my setup, though most of you are probably already familiar:
- 5.4L 3v MMR 1000 shortblock
- Rich Groh (RGR) heads and custom turbo cams
- Livernois lockouts / VCT removed (3v V10 block plates)
- JPC 3v Intake, customized for 5.4L
- GT500 throttle body
- TurboHP kit w/61mm billet turbos
- Lethal Performance triple 255lph fuel pump kit (return style)
- Bosch 160lb fuel injectors
- Autolite HT0 spark plugs
Here's a log from yesterday with Motorocraft O2 sensors:
http://www.cabuzzi.net/website/images/car/misc/P2196/P2196_Idle_Motorcraft.zip
Here's a log from today with NTK O2 sensors:
http://www.cabuzzi.net/website/images/car/misc/P2196/P2196_Idle_NTK.zip
Here's a pic of the spark plugs:
Here's a video of the car running (sounds pretty normal):