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Old 05-30-2009, 07:19 PM   #1 (permalink)
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I need a 1998 12 valve pcm!

I have a 1998 12 valve 5spd that I need a PCM for, The mechanic working on it says it HAS TO BE A 1998! thanks for the help!
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Old 05-30-2009, 09:34 PM   #2 (permalink)
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I think you can get them at Orielly auto parts or Autozone. Why are you replacing it? I went round and round with mine when it got wet . After it dried out it was fine. All it controls is the dash cluster ,tach and possibly the airbags or antilock brakes.
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Old 05-30-2009, 09:39 PM   #3 (permalink)
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you can get them at advanced for like 250, and dodge for 600. They have to be flashed for you vin though.
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Old 05-31-2009, 12:03 PM   #4 (permalink)
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I think you can get them at Orielly auto parts or Autozone. Why are you replacing it? I went round and round with mine when it got wet . After it dried out it was fine. All it controls is the dash cluster ,tach and possibly the airbags or antilock brakes.
How do you check to see if the PCM is out? My tach,oil,fuel gauge is not working as well as my ac clutch.
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Old 05-31-2009, 04:06 PM   #5 (permalink)
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You can run this check to make sure it is not the gauge cluster, and if it is not the gauge cluster then it about has to be the PCM.

98+ Ram Instrument Panel Test
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Old 05-31-2009, 04:51 PM   #6 (permalink)
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You can run this check to make sure it is not the gauge cluster, and if it is not the gauge cluster then it about has to be the PCM.

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Not at all true. Both of the supposed bad PCMs I've dealt with were caused by bad connections to the PCM.
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Old 05-31-2009, 04:52 PM   #7 (permalink)
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How do you check to see if the PCM is out? My tach,oil,fuel gauge is not working as well as my ac clutch.
Check and clean all your connections on the engine and batteries as well as the ones going to the body and fuse panel under the hood. A bad ground is the main problem for most electrical problems. When i had my alternator go out i went through all the connections and used dielectric grease on them , thats been two years and i have not had any issues since. Clear paint works good for battery connections and grounds .
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Old 05-31-2009, 05:13 PM   #8 (permalink)
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I know for a fact that the PCM is bad. I have had it to two different mechanics, one being the dealer, and they have both tested the pcm and there are no outputs from it (the charging side)..... I have been through the whole electrical system and the computer controls the alternator and the gauge cluster but the gauges still work on mine, the charging system is bad.
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Old 05-31-2009, 06:41 PM   #9 (permalink)
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Not at all true. Both of the supposed bad PCMs I've dealt with were caused by bad connections to the PCM.
Still a problem with the PCM though, the gauge check just removes that as a problem. Anyhow I know you cane get them for around 250 at advance auto, and they are 600 or so at dodge. i just replaced mine with the same options as he has and it was 600 something at dodge.
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Old 05-31-2009, 07:34 PM   #10 (permalink)
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Ditchpickle

I would do the Ford voltage regulator option many have used if all your gauges still work. It would be cheaper.
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Old 06-01-2009, 11:12 AM   #11 (permalink)
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I know for a fact that the PCM is bad. I have had it to two different mechanics, one being the dealer, and they have both tested the PCM and there are no outputs from it
Doesn't mean anything, I've been though the same thing before and a new PCM did nothing.

What you're fighting here are mechanics who aren't used to mechanically controlled engines and are lost when the computer doesn't tell them what's wrong so they blame it on the computer.
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Old 06-01-2009, 02:02 PM   #12 (permalink)
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Doesn't mean anything, I've been though the same thing before and a new PCM did nothing.

What you're fighting here are mechanics who aren't used to mechanically controlled engines and are lost when the computer doesn't tell them what's wrong so they blame it on the computer.
So, if the gauges all work with the check mentioned before, then what is next. I am going thru the same thing with no tach, oil, fuel and wait to start lit up. The gauges all moved three times. The volt meter is working.

I hate to take it to one of the shops here in town due to the issues Bill mentioned.
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