Beginner question low map/ rpm blm
Thread Starter
Joined: Mar 2003
Posts: 1,149
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From: Gladstone, Missouri
Car: 91 Camaro RS
Engine: 5.0L TBI (ebl inside)
Transmission: T-5
Axle/Gears: 3.42 lsd 10 bolt
Beginner question low map/ rpm blm
I was just wondering why this happens. I will keep getting 110-120 blm in the 400-1200 rpm 20kpa map. It will keep removing fuel until the car barely idles, but still show the same values in the blm. Why is this and how should I correct this? 8746 ecm running $61 modified axkw bin.
Thread Starter
Joined: Mar 2003
Posts: 1,149
Likes: 1
From: Gladstone, Missouri
Car: 91 Camaro RS
Engine: 5.0L TBI (ebl inside)
Transmission: T-5
Axle/Gears: 3.42 lsd 10 bolt
The BLM min. map is at 13.35, so that shouldn't be it. I didn't find an exact blm min rpm, however I did see the "BLM Cell Boundries RPM." This chart had three columns: low, mid, and high. The row was labeled 2400. The values were 800, 1600, and 2400. I'm not going to lie, I don't understand that chart.
So back to the original question.
So back to the original question.
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From: Chasing Electrons
Car: check
Engine: check
Transmission: check
The BLM minimum MAP threshold can't be below 20 KPa, so the calc is incorrect (at 13.35 KPa). For the BLM boundries low/med/high, they define the center(s) of the BLM array. Best bet is to see the graphic in the ASDZ_HAC.PDF file. Look for something that looks like this:
RBob.
Code:
_______|______|_______|______
| | |
12 | 13 | 14 | 15
_______|______|_______|______ HI MAP 80 Kpa
| | |
8 | 9 | 10 | 11
_______|______|_______|______ MID MAP 60 Kpa
| | |
4 | 5 | 6 | 7
_______|______|_______|______ LO MAP 26 Kpa
| | |
0 | 1 | 2 | 3
_______|______|_______|______
| | |
750 LO RPM ______| | |
| |
1800 MID RPM ___________| |
|
2600 HI RPM ____________________| Last edited by RBob; Aug 22, 2005 at 07:56 PM.
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