Crankshaft position sensor - Dodge Dakota Forum

Subject: Crankshaft position sensor
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93 3.9 What could cause a CPS to go bad? How much should a after market computer go for?

Curly
Dodge Dakota
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6/13/2007
16:05:54

RE: Crankshaft position sensor
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your talking 2 different parts
CPS is crank position sensor
the computer is the PCM

Keith
Dodge Dakota
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6/13/2007
16:14:34

RE: Crankshaft position sensor
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Yes. I know. Truck is in the shop. Yesterday they put in a new CPS. Today they say the computer is bad.

daddio
Dodge Dakota
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6/13/2007
16:39:13

RE: Crankshaft position sensor
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what are your symptoms? it sounds like they're just throwing parts at it and possibly replacing parts that aren't necessary.

Bob Lincoln
Dodge Dakota
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6/14/2007
09:08:12

RE: Crankshaft position sensor
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If it won't start, it's probably the splice in the power harness between the battery and the relay box. Don't let these bozos sell you unncessary parts because they won't or don't know how to troubleshoot.

keith
Dodge Dakota
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6/14/2007
12:30:18

RE: Crankshaft position sensor
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Its started Saturday when the engine stalled on me after it reached temp. the exhaust wasn't blowing very hard. They said the Cat was bad. They replaced it took it for a run came back the Cat was red hot.check light came on, has been going off and on for a while, code said the CPS was bad. They replaced it, took it for a ride and check light came on again. Now its a computer problem. I've used these guys for years and have been good to me.

GB2000
GenIII

6/14/2007
13:07:36

RE: Crankshaft position sensor
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eh...if you really wanna toss all that money at it, go for it...but I'd go with what Bob said and do a little more troubleshooting. I'd definitely start by checking that splice. It's a simple fix and doesn't cost much at all other than a little bit of your time.

daddio
Dodge Dakota
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6/14/2007
13:20:44

RE: Crankshaft position sensor
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PCM's rarely go bad, although a lot of people think otherwise. check the splice as Bob said. if you want to throw money at it check the least expensive/free stuff first.

if you have the right equipment and knowhow, you can check most, maybe all sensors before you go changing them out for funzies.

Curly
Dodge Dakota
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6/14/2007
19:41:31

RE: Crankshaft position sensor
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thats the reason i asked
just making sure he was talking 2 parts
not only how often does a pcm go bad but a crank sensor and pcm at the same time
their taking this guy for a ride

Keith
Dodge Dakota
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6/15/2007
15:11:14

RE: Crankshaft position sensor
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Turns out its not the PCM. There's no voltage to the pcm. They put in a rebuilt and got the same result. Now they're troubleshooting the wiring.

Keith
Dodge Dakota
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6/15/2007
15:13:08

daddio
Dodge Dakota
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6/15/2007
15:17:15

RE: Crankshaft position sensor
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there is a splice they need to check. about 8" under the power dist. box on the drivers fender. 3 or 4 wires into one. spice #115 i believe it is. peel all the tape back, clean the corrosion off, solder it and tape it back up.

daddio
Dodge Dakota
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6/15/2007
15:18:27

RE: Crankshaft position sensor
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by the way, i hope you aren't paying for that PCM that wasn't needed.

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