block learn cell #0
Thread Starter
Burning Brakes
Joined: Sep 2000
Posts: 1,199
Likes: 1
From: NewCastle IN. USA
block learn cell #0
ok can someone tell me alittle about the cell numbers?
I know that being in cell #0 at idle can't be a good thing.. from the search's I've done it would seem that a higher cell would be better.
I'm currently trying to find the cause of a lean condition.
the car has 24lb ford injectors set at 50psi, and a injector constant of 24lb and the MAF tables are stock with diacom showing maf readings of 10 at idle.
I would think this would be pig rich at idle, but the blm's climb to 160 then will drop back down to 152.
anyway if I knew more about what makes the ECM go into cell#0 it might help diagnose whats going on.
RJ
I know that being in cell #0 at idle can't be a good thing.. from the search's I've done it would seem that a higher cell would be better.
I'm currently trying to find the cause of a lean condition.
the car has 24lb ford injectors set at 50psi, and a injector constant of 24lb and the MAF tables are stock with diacom showing maf readings of 10 at idle.
I would think this would be pig rich at idle, but the blm's climb to 160 then will drop back down to 152.
anyway if I knew more about what makes the ECM go into cell#0 it might help diagnose whats going on.
RJ
Drifting
Joined: Nov 2001
Posts: 1,783
Likes: 2
From: Latham NY
Re: block learn cell #0 (ol,RJ)
Cell 0 is okay for low load, low rpm situations. Here are how the BLM's are arranged:
12 13 14 15
08 09 10 11
04 05 06 07
00 01 02 03
y-axis is load and x-axis is rpm.
Could free air be getting in somewhere, being read by the O2 sensor which thinks you are lean? What readings does the O2 sensor have?
12 13 14 15
08 09 10 11
04 05 06 07
00 01 02 03
y-axis is load and x-axis is rpm.
Could free air be getting in somewhere, being read by the O2 sensor which thinks you are lean? What readings does the O2 sensor have?
Thread Starter
Burning Brakes
Joined: Sep 2000
Posts: 1,199
Likes: 1
From: NewCastle IN. USA
Re: block learn cell #0 (Bluevette85)
thanks for the info bluevette85,
the O2 would start out reading fairly normal (jumping back and forth) but on the lean side, say 50mv to 700mv then the BLM's would rise and the O2 would climb into the 500mv-700mv range the strange thing is that the BLM's would keep climbing even though the O2 was not bouncing below 500mv. it would eventually start to come back down and settle in around 152BLM.
the good news is that the lean problem seems to be solved, it actually was lean everywhere. with added fuel pressure the BLM's dropped and everything seems to be falling in place. however the block learn cell is still 0 at idle.
only thing I can think of is that the ECM was over compensating since it was seeing leanness in other areas.
RJ
the O2 would start out reading fairly normal (jumping back and forth) but on the lean side, say 50mv to 700mv then the BLM's would rise and the O2 would climb into the 500mv-700mv range the strange thing is that the BLM's would keep climbing even though the O2 was not bouncing below 500mv. it would eventually start to come back down and settle in around 152BLM.
the good news is that the lean problem seems to be solved, it actually was lean everywhere. with added fuel pressure the BLM's dropped and everything seems to be falling in place. however the block learn cell is still 0 at idle.
only thing I can think of is that the ECM was over compensating since it was seeing leanness in other areas.
RJ
