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Curtis
Dodge Dakota
7/27/2001
14:40:18
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 Subject: PCM Problems
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Message:
I have a 99 DAkota V8. The engine stalls while driving.... and a "NO BUS" is shown in the odometer box. When I opened the hood to check the connection the the PCM the PCM was VERY hot. I wiggled the connections and the truck still didnt start..... it was only AFTER the PCM coold down did it restart. Do I have a bad PCM? I removed the stock airbox... could the engine heat be affecting it?
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koz
Dodge Dakota
7/27/2001
14:53:59
|  RE: PCM Problems
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As far as I know, the PCM is kept cool (relatively speaking), by the opening in the fender well right behind it (I have a '00 Dak for reference, so I hope I'm not in left field here). As long as the aftermarket filter provider (assumption, since you took out the stock filter box) didn't tell you to block that opening, and your exhaust manifold heat shield is intact, then I would be back to the dealership and making him/her show me all of the related service bulletins on the PCM. -Al
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Curtis
Dodge Dakota
7/27/2001
15:06:37
| RE: PCM Problems
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I have had problems with the local dealer. My truck has about 40,000 miles on it and they wont give any info. They told me for around $150 they could take a look at it. I dont know what to do yet. The PCM get so hot I can only touch it for a brief second. I am thinking about just replacing it...... all i need is $500.00 ...:(
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kota4bye
Dodge Dakota
7/27/2001
15:11:55
| RE: PCM Problems
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Message:
Curtis,
The Mopar Performance PCM should only cost you around $300. It will require 92 octane or better. Worth it is my opinion.
99 5.2 4x4 cc
Mopar PCM, AirAid, QuickD TB, Gibson Duals
P.A. 3in Body Lift, 32x11.50's
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koz
Dodge Dakota
7/27/2001
16:38:23
| RE: PCM Problems
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a cheap experiment (actually FREE), is to remove that rubber flap next to the radiator on the PCM side and let some outside air into your engine compartment. I just don't see how a high performance PCM is going to solve the overheating. I could see a T-Stat and plugs helping. -Al
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Mike J
Dodge Dakota
7/27/2001
17:45:01
| RE: PCM Problems
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Message:
koz, the engine isn't overheating, the PCM is too hot to touch
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Curtis
Dodge Dakota
7/27/2001
23:08:00
| RE: PCM Problems
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Message:
What would cause a PCM to overheat? I am worried about replacing it with a new unit and it happening to the new one....
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bigbluedak
Dodge Dakota
7/28/2001
22:29:07
| RE: PCM Problems
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Thay normally get pretty hot. The "NO BUS" error sounds like an internal problem. You should take it to another dealer if you're having trouble with that one. The PCM needs to be replaced but I'm pretty sure you can get DC to pay for it since the PCM is mostly for emissions. In any case if there are others having problems there should be a TSB on it. Stalling while driving has be be a safety issue. What part of the country you in?
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Curtis
Dodge Dakota
7/29/2001
00:12:51
| RE: PCM Problems
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I would try and use the emissions waranty to get it replaced but the engie isnt the stock one.. i swaped out a V6 for the V8..... unless i could carry the PCM to then ..... but i dont know
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koz
Dodge Dakota
7/30/2001
19:16:50
| RE: PCM Problems
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I knew it was not an engine overheat condition, and that the PCM was the thing that was roasting. Now that you've revealed that you've done the engine swap, it makes a little sense. Did you put back that exhaust manifold shield that the factory installed? Are you running headers? The removal of the rubber flap was just to get some cooler air into the engine compartment. The PCM is designed to withstand high temp, but possibly not the temps that are given off in your application. Either way, DC is not going to come through with a new one if you've swapped engines.
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Curtis
Dodge Dakota
7/30/2001
20:43:01
| RE: PCM Problems
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Message:
koz.... do you ever help anyone or do you just like hearing yourself talk??
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koz
Dodge Dakota
7/31/2001
11:22:42
| RE: PCM Problems
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Message:
Hey, I was just trying to be helpful. No one is forcing you to do anything stated here or making you listen to it.
Just turn off your computer...
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Curtis
Dodge Dakota
7/31/2001
14:02:06
| RE: PCM Problems
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Message:
Let see koz... i was talking about a PCM overheating ... and your telling mr to replace my thermostat and spark plugs.... WHAT THE HELL DOES THAT GOT TO DO WITH A PCM??
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koz
Dodge Dakota
7/31/2001
14:39:32
| RE: PCM Problems
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Message:
Regarding my qualifications: I'm an electrical engineer with a bachelor's degree that has a specialty in computers. I've been in this industry for about 18 years and I've designed PCMs. When I provided advice, I was only working with factors that were within your control (like the engine compartment temp). Given that you or I don't have the schematics for the PCM, and that you wanted to diagnose it yourself (and you weren't ready to toss $300-$500 at the problem), it seemed appropriate to offer that advice.
Given your negative responses, I assumed wrong...enough said.
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Jeff
Dodge Dakota
7/31/2001
17:18:29
| RE: PCM Problems
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Message:
Curtis, if your PCM is getting too hot to touch it's obviously something that cannot be cooled enough by dropping the overall engine temp. My first suggestion to you would be to find a way to get more air into your engine compartment. Maybe removing any rubber flaps near the radiator as koz had originally suggested. My second suggestion is to purchase the performance PCM for around $300. If your PCM is overheating I'm thinking it would be the unit itself that has the problem.
Good Luck, let us know what you come up with.
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sandman
Dodge Dakota
7/31/2001
17:50:40
| RE: PCM Problems
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Message:
You might want to check all of the pin out for prober voltage and resistance. I would also check the harness. The next step I would try is to try it in someone elses vechile. In any case check the entire harness before you try installing the new PCM. It is time consumeing but it is alot cheaper then two fried PCM's. The componets inside a PCM were not designed for high voltage or current. It should not be generateing that much heat.
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matt bedard
Dodge Dakota
JOIN HERE
2/17/2004
16:04:29
| RE: PCM Problems
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Message:
looking for performance pcm. part#p5007197 disc. at dealer. 2000 dodge dakota 2wd 4.7v8 cal emissions. ph.714-528-1380
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Kowalski
Dodge Dakota
JOIN HERE
2/17/2004
18:23:30
| RE: PCM Problems
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Message:
You had to dredge up this old post to ask that ? That part was listed but never actually released. Get the Leach flash instead.
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randy kerness
Dodge Dakota
JOIN HERE
9/05/2004
02:00:17
| RE: PCM Problems
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Message:
Curtis, the PCM will get hot, in fact I had the y same exact problem u r haveing, I towed my 2000 dakota to the dealer 2 times, because it died at a light or just would not start. I initially checked the pcm, and yes I could not even touch it it was so hot, stage for a computer system to be so hot, bu this is normal due to the supid thing being located inside the engine compartment... oh the fix, finally I got stuck again, truck died while idling at a stop light, called the service manager, he brought over his tech and this is what was found.... No information could be read from the pcm, it had shut itself down (internal protection circuit) this was due to the fact the the crack shaft senso was intermitanly shorting when the truck was hot. it turns out that this sensor is used for starting your car and idle for timimg purposes, and yes all my gauges went dead ,and I got a "no bus" on my odometer, fix was to replace the crankshaft sensor located on the paggenger side of the engine, by the way the is a new more reliable sensor which the dealer installed, turns out mine truck had an older version, haven't had a problem in 3 weeks, prior to this was every 4 - 5 days, and by the way the dealer replaced 2 pcms, thinkin this was the issue...wrong!!!
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KERNESSUMORON
Dodge Dakota
JOIN HERE
9/05/2004
10:12:36
| RE: PCM Problems
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Message:
i dont beleive it:
MORE THEN 3 YEARS HAS GONE BY SINCE THE ORIGIAL POST, EITHER THE GUY HAS FIXED IT OR SOLD IT IN DISGUST AND SOME CLOWN COMES BY AND SAYS "THIS IS WHAT THE PROBLEM IS ,,, TRY THIS AND IT WILL FIX YOURS TOO"
KERNESS? DO YOUR FRIENDS CALL YOU MORON OR IDIOT BEHIND YOUR BACK?
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Woody
Dodge Dakota
JOIN HERE
8/20/2005
22:03:18
| RE: PCM Problems
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Message:
Your PCM is covered under an 80,000 mile emissions warranty. Take it to the dealer even labor is covered. Don't buy one...
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