lowering block learn
Thread Starter
Instructor
Joined: Aug 2007
Posts: 144
Likes: 4
From: Chandler Arizona
lowering block learn
Hey guys,
i have been tuning my C4 and i have a really high block learn it sits about 150 - 160 and when flooring it the block learn drops to 132 - 138. i have been playing with the power enrichment Vs RPM. but it will not affect the idle. can anyone offer advice for what i need to change?
i have been tuning my C4 and i have a really high block learn it sits about 150 - 160 and when flooring it the block learn drops to 132 - 138. i have been playing with the power enrichment Vs RPM. but it will not affect the idle. can anyone offer advice for what i need to change?
Thread Starter
Instructor
Joined: Aug 2007
Posts: 144
Likes: 4
From: Chandler Arizona
i am not seeing injector constant on tunerpro i am using the 6E definitions. the only thing with injector in it is the size at 40 psi. can i use a different XDF file and use it with my car? or can i only use 6E?
Safety Car
Joined: Sep 2001
Posts: 4,161
Likes: 554
From: Glenbeulah Wi
Hey guys,
i have been tuning my C4 and i have a really high block learn it sits about 150 - 160 and when flooring it the block learn drops to 132 - 138. i have been playing with the power enrichment Vs RPM. but it will not affect the idle. can anyone offer advice for what i need to change?
i have been tuning my C4 and i have a really high block learn it sits about 150 - 160 and when flooring it the block learn drops to 132 - 138. i have been playing with the power enrichment Vs RPM. but it will not affect the idle. can anyone offer advice for what i need to change?
Thread Starter
Instructor
Joined: Aug 2007
Posts: 144
Likes: 4
From: Chandler Arizona
I have messed with the MAF table one and it did not move the block learn off of 160. the MAF was reading 9.86 Grams/sec at idle so I moved it around from 7.36 Grams/sec to 13.86 Grams/sec and the block learn did not move from 160.
I have messed with the injector sizing as well and it still will not move.When i give it any gas it drops to around 128. am i just missing something? the car has 42 pound injectors it should not be lean.
I have messed with the injector sizing as well and it still will not move.When i give it any gas it drops to around 128. am i just missing something? the car has 42 pound injectors it should not be lean.
Safety Car
Joined: Sep 2001
Posts: 4,161
Likes: 554
From: Glenbeulah Wi
I have messed with the MAF table one and it did not move the block learn off of 160. the MAF was reading 9.86 Grams/sec at idle so I moved it around from 7.36 Grams/sec to 13.86 Grams/sec and the block learn did not move from 160.
I have messed with the injector sizing as well and it still will not move.When i give it any gas it drops to around 128. am i just missing something? the car has 42 pound injectors it should not be lean.
I have messed with the injector sizing as well and it still will not move.When i give it any gas it drops to around 128. am i just missing something? the car has 42 pound injectors it should not be lean.
Sometimes a big cam will fool an O2 sensor because the large overlap at idle will cause exhaust gas to mix with the remaining fuel in the cylinder making the 02 sensor believe the car is lean when it actually is not. This is only a problem at idle and it may be your issue, I do not know your cam specifications. The O2 measures the amount of oxygen burned in the mixture and a large exhaust dilution can cause false readings.
Volts gm/Sec
0.00 8.4
0.18 3.8
0.37 5.3
0.55 7.3
0.73 9.9
0.91 10.9
1.10 14.0
1.28 17.7
1.46 22.3
Mass Air Flow Table #2
Volts gm/Sec
1.46 22.3
1.55 25.0
1.65 27.6
1.74 30.6
1.83 33.8
1.92 37.1
2.01 40.7
2.10 44.5
2.19 47.7
Thread Starter
Instructor
Joined: Aug 2007
Posts: 144
Likes: 4
From: Chandler Arizona
I think you are right about the cam being the problem this is the cam i am using
http://www.summitracing.com/parts/CCA-08-432-8/ so if I am getting false reading should I tell it to use the LV8 for BLM instead of dispflow?
http://www.summitracing.com/parts/CCA-08-432-8/ so if I am getting false reading should I tell it to use the LV8 for BLM instead of dispflow?
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Melting Slicks
Joined: Aug 2003
Posts: 3,409
Likes: 400
From: Lakeville MI
The BLM won't come down on its own. It needs the integrator to pull it down.
So in order to see the BLM change, you must see integrator activity. The 160 that you see may be from stored SAM cell data if the integrator isn't moving.
Disconnect the battery to clear the SAM data. This will allow your blms to start from 128 and adjust from there. If cell 0 blm climbs again to 160, then you will know that the ECM is seeing a continous lean condition. This may be the result of a misfire, or other source of extra air in the exhaust.
Post up the injector offset tables from your tune. I suspect that they need some work for the 42s.
So in order to see the BLM change, you must see integrator activity. The 160 that you see may be from stored SAM cell data if the integrator isn't moving.
Disconnect the battery to clear the SAM data. This will allow your blms to start from 128 and adjust from there. If cell 0 blm climbs again to 160, then you will know that the ECM is seeing a continous lean condition. This may be the result of a misfire, or other source of extra air in the exhaust.
Post up the injector offset tables from your tune. I suspect that they need some work for the 42s.
Thread Starter
Instructor
Joined: Aug 2007
Posts: 144
Likes: 4
From: Chandler Arizona
i don't have injector offset tables. i am using the 6E bin and the 6E.xdf from the tuner pro website
here is my MAF table 1.
0.00 11.53
0.18 4.50
0.37 6.09
0.55 9.28
0.73 12.75
0.91 13.50
1.10 17.34
1.28 22.03
1.46 23.91
here is my MAF table 1.
0.00 11.53
0.18 4.50
0.37 6.09
0.55 9.28
0.73 12.75
0.91 13.50
1.10 17.34
1.28 22.03
1.46 23.91
