PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Car wont start after flash????

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Old Apr 25, 2005 | 08:20 PM
  #41  
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normally if the program says invalid code, then the pcm needs repaired, or it is locked, The security of the pcm is no longer correct. if it says invalid checksum, then somehow durring the write to the pcm the data became corrupt or did not write correctly and so the checksums are not the correct value, I can fix it for you for sure.
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Old Apr 25, 2005 | 08:33 PM
  #42  
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you should be ok, i did it one time, it only locked the pcm. i had to have predator unlock it. i had my computer die on me while flashing the comptuer and just had to hook it back up and reflash, just make sure the battery is charged and if anything happens, dont turn the key off
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Old Apr 25, 2005 | 08:34 PM
  #43  
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It was not hp's fault for my pcm. I just tried to use it to recover it.

I've flashed 98 pcm's over 100 times, no issues.

Ryan
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Old Apr 25, 2005 | 08:38 PM
  #44  
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let me ask you this then what if you just read a pcm and then after the read the battery is dead? Will there be anyproblems. All I did was read the pcm and I went to start the car and the battery was dead.
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Old Apr 25, 2005 | 08:46 PM
  #45  
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any time you read or write to the computer u shouldnt do it if the pcm voltage is low, says it right in hp tuners
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Old Apr 25, 2005 | 08:48 PM
  #46  
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I thought the battery was charged and saw no reason why it did not have a full charge....So I was pretty dumbfounded when the car would not start
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Old Apr 26, 2005 | 02:21 AM
  #47  
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Someone help me out here. Doesn't HP read in like 2 minutes?? Sevanseriesta, you're saying in the 2 minutes to read your battery died?? When was the last time the car was started or how long were accessories left on?? I just can't see why a battery would die in a 2 minute read. Was it the original battery that came with the car?
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Old Apr 26, 2005 | 07:52 AM
  #48  
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waht did the voltage read when you first started to read? if all your accessories were off it shouldnt have died
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Old Apr 26, 2005 | 12:09 PM
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From: Gardner, KS
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The car was started the previous day and the voltage read 11.9. The car ran for about 15 mins. There were no accessories on cause I really dont have very many. The door was closed, so no lights were on ac/heater were all off there is no radio. I am not sure what happened. I have not touched the car since. It has been rainy and cold I will work on it tomorrow and get the battery charged and make sure that it starts.
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Old Apr 26, 2005 | 12:23 PM
  #50  
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damn, thats strange
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Old Apr 26, 2005 | 12:46 PM
  #51  
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Originally Posted by WS6FirebirdTA00
damn, thats strange
Do you think that something is wrong with my PCM now? I mean all I did was read it so it is not like I changed anything.

By the way thanks for that write up there was a lot of good info in that.
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