i have a 06 gmc 4.3... i know i know its a 6 but i'm upgrading soon....ordered a tune from allen and when i installed the tune it instantly idled at 3000 rpm... i shut the truck off and restarted it about 5 times and the same thing happened...i then let the truck run for a few min and nothing improved... i told allen about this and he said that he sent me the wrong pcm... i received the new tune today and it does the same thing.... any suggestions on what is going on?

 

what does it do when you install the stock pcm or do you not have that?

 

i do have the stock.... it does great with stock... i just talked to allen and he said that for some reason the pcm isn't taking... allen said he is going to get another one in and go from there