Crankshaft sensor: what purpose?
03-23-2011, 07:17 PM
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Crankshaft sensor: what purpose?
Hi folks,
Just wondering: what is it for?
I've been through my Mopar Diesel Engine Supplement book, explains every sensor except the crankshaft position sensor.
There's no tachometer in my truck, so what does it do?
Just wondering: what is it for?
I've been through my Mopar Diesel Engine Supplement book, explains every sensor except the crankshaft position sensor.
There's no tachometer in my truck, so what does it do?
03-23-2011, 11:00 PM
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My truck did, just measures rotations of the motor for a tach. I'm thinkin my buddy's 90 didn't have one though??? so maybe just the 92 and 93's or intercooled ones did?
03-23-2011, 11:16 PM
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Pre-'92 did not have one factory installed for the PCM.
However, the over-the-counter tachometers for the '90 and '91s came with an add-on sensor to read the 2 notches in the crank balancer.
I recently bought a tach out of a '91 non-intercooled truck that had the notched damper.
Everything I have seen so far says that '89 and "some" 1990s didn't get the 2 notched balancer for the sensor to read.
I know for a fact that '90 and '91 had plug ins in the dash harness to support the over-the-counter tachs that Chrysler offered, as did the '92 and '93 dash harnesses, of course.
I have not verified if '89 had the plug in the harness, but I doubt that it did.
Mark.
However, the over-the-counter tachometers for the '90 and '91s came with an add-on sensor to read the 2 notches in the crank balancer.
I recently bought a tach out of a '91 non-intercooled truck that had the notched damper.
Everything I have seen so far says that '89 and "some" 1990s didn't get the 2 notched balancer for the sensor to read.
I know for a fact that '90 and '91 had plug ins in the dash harness to support the over-the-counter tachs that Chrysler offered, as did the '92 and '93 dash harnesses, of course.
I have not verified if '89 had the plug in the harness, but I doubt that it did.
Mark.
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03-24-2011, 07:23 AM
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Pre-'92 did not have one factory installed for the PCM.
However, the over-the-counter tachometers for the '90 and '91s came with an add-on sensor to read the 2 notches in the crank balancer.
I recently bought a tach out of a '91 non-intercooled truck that had the notched damper.
Everything I have seen so far says that '89 and "some" 1990s didn't get the 2 notched balancer for the sensor to read.
I know for a fact that '90 and '91 had plug ins in the dash harness to support the over-the-counter tachs that Chrysler offered, as did the '92 and '93 dash harnesses, of course.
I have not verified if '89 had the plug in the harness, but I doubt that it did.
Mark.
However, the over-the-counter tachometers for the '90 and '91s came with an add-on sensor to read the 2 notches in the crank balancer.
I recently bought a tach out of a '91 non-intercooled truck that had the notched damper.
Everything I have seen so far says that '89 and "some" 1990s didn't get the 2 notched balancer for the sensor to read.
I know for a fact that '90 and '91 had plug ins in the dash harness to support the over-the-counter tachs that Chrysler offered, as did the '92 and '93 dash harnesses, of course.
I have not verified if '89 had the plug in the harness, but I doubt that it did.
Mark.
Are you saying that all I need is to get a tach that connects to a connector under my dash, and I have an instant tach ? Do you know where I can get one ?
I have a 93 intercooled, and from your description above, it looks like I can luck out with ease of installation of a tach
T.
03-24-2011, 07:25 PM
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03-25-2011, 07:53 AM
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Thanks Guys.
The search is on...
T.
The search is on...
T.
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