How it could be?
Thread Starter
Junior Member
Joined: May 2002
Posts: 22
Likes: 0
From: Moscow, Russia
Car: Chevy Camaro RS 1992
Engine: 3.1 L
Transmission: Automatic
How it could be?
In the previous thread
https://www.thirdgen.org/techbb2/sho...hreadid=292889
I wrote that I have found the way how to read ECM data.
After several tests I found that MAP sensor reads 200 kPa when engine is not running. How it could be? I definitely have 1 bar MAP sensor and 1227730 ECM. I suppose it is different chip possibly from turbo charged engine. Any ideas??? Does anybody have ECM direct from 3.1 V6 Camaro? I would buy it.
https://www.thirdgen.org/techbb2/sho...hreadid=292889
I wrote that I have found the way how to read ECM data.
After several tests I found that MAP sensor reads 200 kPa when engine is not running. How it could be? I definitely have 1 bar MAP sensor and 1227730 ECM. I suppose it is different chip possibly from turbo charged engine. Any ideas??? Does anybody have ECM direct from 3.1 V6 Camaro? I would buy it.
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From: Chasing Electrons
Car: check
Engine: check
Transmission: check
The scan tool you are using is incorrect. The ECM outputs the MAP value as ADC counts (analog-to-digital convertor counts, 0-255, ADC * 0.019 will be the MAP voltage) and the scan tool converts that value to volts or KPa.
RBob.
RBob.
Thread Starter
Junior Member
Joined: May 2002
Posts: 22
Likes: 0
From: Moscow, Russia
Car: Chevy Camaro RS 1992
Engine: 3.1 L
Transmission: Automatic
The other data from analog sensors (Temp, TPS) are correct...
Anyway it couldn't b be that for MAP sensor there is special or different ADC in ECM.
Anyway it couldn't b be that for MAP sensor there is special or different ADC in ECM.