R56 2009 R56 HELP (boost cut)
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1st Gear
Joined: Dec 2013
Posts: 20
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2009 R56 HELP (boost cut)
Hello all! I have a 09 cooper S with a few mods:
- Bigger FMIC
- ALTA hot side boost tube
- catless 2.5' dpipe with 2.5' exhaust and magnaflow muffler
- K&N intake
- Alta accessport (currently running stage II tune)
When i run it daily, runs great. But when its time to really put the pedal to the floor the car cuts boost.
I have to let go of gas and floor it agian so it charges the boost again, otherwise the car just misfires. After a misfire i would expect a code, but not, the only code the car gives me is P2096.
I would appreciate the help. I recently blew a piston and rebuilt the whole thing. Any ideas what could be causing this boost problem?
- Bigger FMIC
- ALTA hot side boost tube
- catless 2.5' dpipe with 2.5' exhaust and magnaflow muffler
- K&N intake
- Alta accessport (currently running stage II tune)
When i run it daily, runs great. But when its time to really put the pedal to the floor the car cuts boost.
I have to let go of gas and floor it agian so it charges the boost again, otherwise the car just misfires. After a misfire i would expect a code, but not, the only code the car gives me is P2096.
I would appreciate the help. I recently blew a piston and rebuilt the whole thing. Any ideas what could be causing this boost problem?
4th Gear
Joined: Jun 2013
Posts: 402
Likes: 0
From: KC, MO
MCs or JCW? Are you hitting over 22 psi on the tune?
What do egt's, timing, and Afr show?
How old are the plugs?
What gas are you using? Which tune are you running?
Logs?
Sent from my Nexus using NAMotoring
What do egt's, timing, and Afr show?
How old are the plugs?
What gas are you using? Which tune are you running?
Logs?
Sent from my Nexus using NAMotoring
Last edited by nine5raptor; Aug 1, 2014 at 05:15 PM.
Former Vendor
Joined: Apr 2011
Posts: 52
Likes: 0
From: Phoenix AZ
The code P2096, post catalyst fuel trim system too lean on bank 1 simply translates to a lean (too much air and not enough fuel) condition from the oxygen sensors to the ECU.
- Oxygen sensor harness is open or shorted
- Oxygen sensor circuit poor electrical connection
- Exhaust system leak
- Faulty front or rear (pre-cat or downstream) sxygen sensor
- to much air from improper ECU tune
- back pressure in-riching the AFR by pushing oil out the front of the turbo into the intake (won't happen if you de-cated both of the catalytic converters unless you have a exhaust restriction)
Seems like a sensor issue since you de-cated the primary cat in the DP did you also do the secondary one?.
What are the EGTs? Can be read with the torque app bank 1 sensor 1 should be 1400f to 1500f @ 65 to 85mph and 1000f at @ 35mph.
How many miles are on your car?
When does the error happen?
Does it happen when you remove the stage II tune?
- Oxygen sensor harness is open or shorted
- Oxygen sensor circuit poor electrical connection
- Exhaust system leak
- Faulty front or rear (pre-cat or downstream) sxygen sensor
- to much air from improper ECU tune
- back pressure in-riching the AFR by pushing oil out the front of the turbo into the intake (won't happen if you de-cated both of the catalytic converters unless you have a exhaust restriction)
Seems like a sensor issue since you de-cated the primary cat in the DP did you also do the secondary one?.
What are the EGTs? Can be read with the torque app bank 1 sensor 1 should be 1400f to 1500f @ 65 to 85mph and 1000f at @ 35mph.
How many miles are on your car?
When does the error happen?
Does it happen when you remove the stage II tune?
Thread Starter
|
1st Gear
Joined: Dec 2013
Posts: 20
Likes: 0
The code P2096, post catalyst fuel trim system too lean on bank 1 simply translates to a lean (too much air and not enough fuel) condition from the oxygen sensors to the ECU.
- Oxygen sensor harness is open or shorted
- Oxygen sensor circuit poor electrical connection
- Exhaust system leak
- Faulty front or rear (pre-cat or downstream) sxygen sensor
- to much air from improper ECU tune
- back pressure in-riching the AFR by pushing oil out the front of the turbo into the intake (won't happen if you de-cated both of the catalytic converters unless you have a exhaust restriction)
Seems like a sensor issue since you de-cated the primary cat in the DP did you also do the secondary one?.
What are the EGTs? Can be read with the torque app bank 1 sensor 1 should be 1400f to 1500f @ 65 to 85mph and 1000f at @ 35mph.
How many miles are on your car?
When does the error happen?
Does it happen when you remove the stage II tune?
- Oxygen sensor harness is open or shorted
- Oxygen sensor circuit poor electrical connection
- Exhaust system leak
- Faulty front or rear (pre-cat or downstream) sxygen sensor
- to much air from improper ECU tune
- back pressure in-riching the AFR by pushing oil out the front of the turbo into the intake (won't happen if you de-cated both of the catalytic converters unless you have a exhaust restriction)
Seems like a sensor issue since you de-cated the primary cat in the DP did you also do the secondary one?.
What are the EGTs? Can be read with the torque app bank 1 sensor 1 should be 1400f to 1500f @ 65 to 85mph and 1000f at @ 35mph.
How many miles are on your car?
When does the error happen?
Does it happen when you remove the stage II tune?
miles on vehicle 56k
the error usually happened during daily driving
I actually removed the tune (its been 3 days) and the error code hasnt come up yet.
I didnt know it meant it was running lean! no wonder a piston gave in.
4th Gear
Joined: Jun 2013
Posts: 402
Likes: 0
From: KC, MO
EGT is Exhaust Gas Temperature and can be used as an indicator of whether everything is all good or having issues. Anyone who is not stock should keep an eye on it or AFR at the minimum.
Sent from my Nexus using NAMotoring
Sent from my Nexus using NAMotoring
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