Does the ecm rely on tach reading at all?
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Joined: Jul 1999
Posts: 700
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From: Pineville, NC US
Car: An '87 Italian Retard Out Cruisin'
Engine: LS1 install in progress
Transmission: 4L60e
Axle/Gears: 9 bolt
Does the ecm rely on tach reading at all?
Problem is, I am going to be putting in a 4thgen dash and I have an LS1 cluster. The LS1 tach is not going to read correctly when I put it in my car until I get a Dakota box which wont be for awhile.
So my questions are
1)Does the ecm rely on the tach for anything or the tach the ecm?
2) Will it hurt the LS1 tach if it is bouncing all around all the time until I get the Dakota box?
So my questions are
1)Does the ecm rely on the tach for anything or the tach the ecm?
2) Will it hurt the LS1 tach if it is bouncing all around all the time until I get the Dakota box?
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Re: Does the ecm rely on tach reading at all?
Originally posted by john5.7 87Iroc
Problem is, I am going to be putting in a 4thgen dash and I have an LS1 cluster. The LS1 tach is not going to read correctly when I put it in my car until I get a Dakota box which wont be for awhile.
So my questions are
1)Does the ecm rely on the tach for anything or the tach the ecm?
2) Will it hurt the LS1 tach if it is bouncing all around all the time until I get the Dakota box?
Problem is, I am going to be putting in a 4thgen dash and I have an LS1 cluster. The LS1 tach is not going to read correctly when I put it in my car until I get a Dakota box which wont be for awhile.
So my questions are
1)Does the ecm rely on the tach for anything or the tach the ecm?
2) Will it hurt the LS1 tach if it is bouncing all around all the time until I get the Dakota box?
The ECM uses reference pulses directly from the distributor ignition module. This signal is passed on to the ECM via the 4-pin connector on the distributor.
RBob.
Thread Starter
Senior Member
Joined: Jul 1999
Posts: 700
Likes: 0
From: Pineville, NC US
Car: An '87 Italian Retard Out Cruisin'
Engine: LS1 install in progress
Transmission: 4L60e
Axle/Gears: 9 bolt
allright cool. So that tach not working wont screw with the ecm. But what about the 4thgen tach itself? Will it get damaged at all driving it like that for awile?
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