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Innovative Expedition
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7 Posts
Discussion Starter #1
I have a remote start paging alarm.... I upgraded m alternator to a 200amp yesterday to help power my stereo system a little better (over 6000 watts) When I got the new alternator on the truck will start... run a little rough sometimes, and 5 seconds later will shut clean off... I changed the alternator back to the stock 130 amp and its still doing it? The theft light comes on when I start it now and I have been told its the chip in the key... I have the box that relocates that key to under my dash and when I take the key out of the box it wont fire at all... so i dont think it is that.... also my headlights and parking lights quit working in the front.... any ideas from you Subject Matter Experts out there? I used to be a learning mechanic but have been in iraq for the better part of the last 7 years and I fear I am out of practice....
Thank you much
Jason:angry:
 

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Innovative Expedition
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7 Posts
Discussion Starter #2
i got relays clicking all over the place and one of them acts like it is on steroids when i turn the ignition to run and after the truck dies..... please someone help me
 

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Super Moderator
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11,033 Posts
Have you checked all the fuses? How about the grounds on the engine and elsewhere? Look at the connections near the alternator that might have gotten loosened with the replacement work.
 

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Innovative Expedition
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7 Posts
Discussion Starter #4
I have checked all the fuses... I will check the grounds at first light... thank you very much.... Also I got a diagram and it is the ECM relay that goes spastic when I turn the key on and after the truck shuts off.... it clicks probably 30 times if not more within a second or so as soon as i turn the key to run.... maybe ECM got shorted somehow? Is there a way to test or maybe reset it?
Jason
 

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Innovative Expedition
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7 Posts
Discussion Starter #6
yah I have to get it there to get them to pull the codes..... i think im gonna buy a PCM at the wrecking yard tomorrow to double check it.... i checked all the wiring i had access to and replaced the relay and it still makes the PCM relay go haywire....
 

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Innovative Expedition
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7 Posts
Discussion Starter #11
Yes I did I have been using it for months like that..... That was my initial thought so I removed the box completely and used the chipped (factory) key in the ignition and it starts and runs fine, then just shuts off.... could upgrading the alternator to a 200amp have even fried the PCM???
 

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4 Posts
Just replaced my alt & had the same thing happen, but i had the air intake hose off (between the filter & TB), put that back on & after a couple times of starting it began to work just fine. I had to pull the hose in order to get the Alt off & it has what seems to be an Air temp sensor on the upper back side, could this be unplugged?
 
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