Car wont start after flash????
TECH Senior Member
Joined: Nov 2001
Posts: 7,036
Likes: 1
From: Lake Zurich, IL
is the fuel pump priming? if there's a problem w/the Pass Key (BCM) it will cause the fuel pump to not prime.. (it sends a ground to the fuel pump relay), then when you crank you'd be dumping all the pressure out... fuel pump isn't a fun job so make sure you're 100% sure that's it (try manually jumping the relay)
The Fuel pump should prime for a second or two when the key is first inserted to get fuel pressure up
The Fuel pump should prime for a second or two when the key is first inserted to get fuel pressure up
It primes just maybe a second if that long, it sounds kind of ill not a nice hmmmm sound like normal. I have a friend who has a shop so the tank drop will be easier, that is also why I am asking dont want to if I dont have to.
Well changed the fuel pump and no luck. Check the computer with my friends Tech 2 and had a code 601 Internal Control Module Memory Check Sum Error. Computer fried? 
P0601 INTERNAL CONTROL MODULE MEMORY CHECK SUM ERROR
http://www.hptuners.com/forum/YaBB.p...20;start=25#25
This will kill the gm computer.
Sorry.
Ryan
http://www.hptuners.com/forum/YaBB.p...20;start=25#25
This will kill the gm computer.
Sorry. Ryan
FormerVendor
Joined: Jan 2003
Posts: 525
Likes: 0
From: Melbourne, Australia
It's a checksum error in the PCM. You need to write the PCM again or rewrite entire (depending what happened to get it this way). BTW, you will see this DTC on VCM scanner.
Either way our s/w is able to recover from this error.
Chris...
Either way our s/w is able to recover from this error.
Chris...
So is it purchase time or have it flashed at the dealer or will my friends tech 2 flash it?
If I need to buy a VCM will any '98 computer work? And where is the best place to get one.
If I need to buy a VCM will any '98 computer work? And where is the best place to get one.
I have also already tried to re-write entire vcm... no luck
Chris I assume that you are with Hp tuners. If so then I was e-mailing you about two weeks ago about this.
Chris I assume that you are with Hp tuners. If so then I was e-mailing you about two weeks ago about this.
Just tried to re-wrie entire vcm and then write vcm and no luck
Something I remember now is when this all started I think I got an error
Security Codes Denied - Required Delay not Expired
or
Security Codes Denied - Invalid Authorization Code
Something I remember now is when this all started I think I got an error
Security Codes Denied - Required Delay not Expired
or
Security Codes Denied - Invalid Authorization Code
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo FormerVendor
Joined: Jan 2003
Posts: 525
Likes: 0
From: Melbourne, Australia
Originally Posted by -IH8RICE-
I have also already tried to re-write entire vcm... no luck
Chris I assume that you are with Hp tuners. If so then I was e-mailing you about two weeks ago about this.
Chris I assume that you are with Hp tuners. If so then I was e-mailing you about two weeks ago about this.
Chris...
FormerVendor
Joined: Jan 2003
Posts: 525
Likes: 0
From: Melbourne, Australia
Originally Posted by -IH8RICE-
What do you mean by that?
Please email me at support@hptuners.com if you have any more questions.
Cheers,
Chris...
Originally Posted by 2000 ws6
Had the same thing happen on a buddies car a few weeks ago, disconnect the battery for 10 minutes and after you reconnect it try to write the vcm again. It worked on my buddies car.
I have a dead pcm because of that code as well, i should try it again now, it has been on a shelf for many many months
Ryan
******* ****, the exact same thing just happened to my buddies 98 with hptuners.
Loaded the file now it won't start. No voltage coming from the vcm and the fuel pump relay is clikcing. Tried resetting the computer, d/c the batter,switching fuses and nothing. It wont read or write the vcm,. Hptuners states no vcm found.
Any ideas?
Loaded the file now it won't start. No voltage coming from the vcm and the fuel pump relay is clikcing. Tried resetting the computer, d/c the batter,switching fuses and nothing. It wont read or write the vcm,. Hptuners states no vcm found.
Any ideas?
Same thing happened to my buddies 98, and he had to swap the computer. With the new computer in it fired right up. I heard the 98's are a touchy computer to play with, meaning harder to recover.
Ok you guys scare me. What did you do to fry the pcm. I have hp tuners and I am getting ready to write my pcm with a new file. I am worried that this will happen to me. What precautions should I take to make sure this does not happen to me. DAMN 98's