Possible burned up computer from restarting a lot

Tiny
VINCENT DUSENBERRY
  • MEMBER
  • 1988 DODGE DAKOTA
  • 3.9L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 78,000 MILES
Is it possible to burn up the computer by restarting it too many times?
Sunday, March 8th, 2020 AT 8:27 AM

15 Replies

Tiny
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Anything is possible but it is unlikely that the ECM will be damaged by repeated starting. The likely failure when repeatedly starting the vehicle is the starter will wear out.

Give me the detail about what you are dealing with and I am sure we can work through this. I am picking up that you have a starting issue and you think the ECM is at fault? Do you have any codes and what is the history on this issue? What parts have you replaced?

We are here to help if you need more with this issue. Thanks
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Sunday, March 8th, 2020 AT 8:43 AM
Tiny
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I am sorry I meant to say is it possible to burn up the computer by resetting it too many times.
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Sunday, March 8th, 2020 AT 3:57 PM
Tiny
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Oh. Resetting it how? The two main ways are to disconnect the battery or using a scan tool. Either way, I have never seen doing this hurt any modules.

How many times have you reset it and may I ask why you are resetting it so many times? Don't feel like you need to give me the detail but I am just wondering if I can assist with the greater issue. Thanks
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Sunday, March 8th, 2020 AT 4:57 PM
Tiny
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I've replaced about every sensor EGR valve the EVAP system valve distributor cap rotor button plug wires and it still runs rough. Now it will start and run like nothing's wrong until you put it in gear it has no power like it wants to go but something's holding it back. It's throwing no codes or my check engine light is not on. I've been trying to figure it out for about 3 months now.
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Sunday, March 8th, 2020 AT 5:56 PM
Tiny
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Okay. You are on the right path with the EGR. Normally when putting a vehicle in gear and it runs rough it is related to the EGR. Since the valve is new we need to remove it again and look at the inlet and see if there is carbon or it is dirty. We need to make sure the passage is clear.

Then we need to monitor the o2 sensor data and see if it is lean (as I suspect) when you put it in gear. If you don't have a scan tool, try spraying a little starter fluid in the intake when it is running rough. You will need someone to sit in it while you do this so they can hold their foot on the brake or lift the drive wheels so it is safe.

Once we know if it is rich or lean when running rough we can make the next decisions.
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Monday, March 9th, 2020 AT 6:02 PM
Tiny
VINCENT DUSENBERRY
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I definitely smell fuel like crazy.
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Monday, March 9th, 2020 AT 6:46 PM
Tiny
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Okay. Then we need to monitor o2 sensor data to be sure but the most likely cause is the o2 sensor is/are inaccurate. What happens is the o2 sensor reads how much oxygen in the exhaust. When there is more fuel it takes place of the oxygen so it reads lower and the PCM cuts the fuel back.

When you are adding a load to the engine, if it is dumping fuel then the PCM should see this and cut it back. This means if the o2 sensors are not reading rich when you can smell fuel then they are not telling the PCM that it is rich to cut it back.

Do you have access to or know someone that has a scan tool that can watch this when it is running rough?
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Tuesday, March 10th, 2020 AT 5:38 PM
Tiny
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No, but I can monitor it with my multi-meter because I track down the color wire that goes to the PCM that monitors the O2 sensor. If that makes any sense to you.
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Tuesday, March 10th, 2020 AT 5:52 PM
Tiny
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Sure. That will work because we need o2 sensor voltage. That is the same thing that the PCM will display. Let me know what you find and we can go from there. Good thinking by the way.
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Tuesday, March 10th, 2020 AT 5:53 PM
Tiny
VINCENT DUSENBERRY
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I am getting.14 voltage from the o2 sensor harness. Is that enough voltage?
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Wednesday, March 11th, 2020 AT 3:54 PM
Tiny
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Okay. That is rich. When you say you replaced every thing does that include the PCV and Purge?

At this point we need to find out why we are running rich. I don't think this is an issue exclusive to putting it in gear. I think that is just when you are seeing the issue.

Let's start with these and then if you can provide a detailed list of all the parts you have put on that would help. We are getting to the point where I suspect we are just overlooking something.
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Wednesday, March 11th, 2020 AT 6:59 PM
Tiny
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Is there a relay for the 02 sensor?
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Thursday, March 12th, 2020 AT 5:06 AM
Tiny
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No relay. They are direct feed to the PCM and direct ground.
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Thursday, March 12th, 2020 AT 5:18 PM
Tiny
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Oh, okay. So I track down wires from the computer to all the sensors did continuity test on all of them I was getting readings. Then I came to the automatic shut-off relay and that might be my problem. Is there a way I can bypass the relay with jumping a wire? And do you know what the sensor is down back behind the throttle body like on the bell housing? It's just a two prong plug.
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Thursday, March 12th, 2020 AT 7:11 PM
Tiny
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That would be a new one on me if the ASD is the issue. Normally if the ASD is working then it is working. If not, then you have a no start. I haven't seen an ASD cause a rough running condition so keep me updated on that one.

As for the connector, this is most likely an intermediate connector but I am not sure which one it is off the top of my head. Can you get a picture of it and I will try to find it on a wiring diagram.
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Friday, March 13th, 2020 AT 4:15 PM

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