Runnig for a second
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Runnig for a second What should i look for when the 5.3 starts and runs for a second, then dies with or without thottle? I know i should look for vats in the pcm, but i am using a truck pcm, that supposedly does not have vats
Originally Posted by Formulized94
What should i look for when the 5.3 starts and runs for a second, then dies with or without thottle? I know i should look for vats in the pcm, but i am using a truck pcm, that supposedly does not have vats
Its the security doing this... My buddy and I had the same problem last night with his 01 computer on a 03 motor...
The procedure we did to "re learn" was turn the key to on(so the fuel pump primes) leave it for 10 minutes, turn the ignition off and pull the key out for 15 seconds then repeat 3 times.
That got us running last night! Thank god too.
-Matt
The procedure we did to "re learn" was turn the key to on(so the fuel pump primes) leave it for 10 minutes, turn the ignition off and pull the key out for 15 seconds then repeat 3 times.
That got us running last night! Thank god too.
-Matt
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From: Cleveland, TN
Originally Posted by ls1_chevelle
Its the security doing this... My buddy and I had the same problem last night with his 01 computer on a 03 motor...
The procedure we did to "re learn" was turn the key to on(so the fuel pump primes) leave it for 10 minutes, turn the ignition off and pull the key out for 15 seconds then repeat 3 times.
That got us running last night! Thank god too.
-Matt
The procedure we did to "re learn" was turn the key to on(so the fuel pump primes) leave it for 10 minutes, turn the ignition off and pull the key out for 15 seconds then repeat 3 times.
That got us running last night! Thank god too.
-Matt
did that bypass the security? i have never heard of that. please post details of your swap.
Originally Posted by Formulized94
did that bypass the security? i have never heard of that. please post details of your swap.
The vehicle was a 2001 1500HD with a 6.0l. Some drunk fool stole the truck, bagged it, over heated it.... My buddy bought it back from insurence so we put a new motor in(old one was low on compression from overheating). His gauge cluster was flashing security and when we started it, it'd run for a second until security kicked in and shut the truck off. Oh, the ecu had to relearn the crap in the steering column(because we had to put a new one in)
Try the procedure I mentioned above, it should fix your problem.
Long story short, Jim is right... Theres still some kind of security stuck in your ecu.
-Matt
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ok, so you put it back into a new truck. I am putting mine in an 81 c10 with a modified truck harness. LIke you said tho, I still think there is some security holding me from running. Dang it if i only had hptuners
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Teching In
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I was told by the guy who programmed my computer that there is virtually nothing for the computer to "learn" in a conversion swap. All of the stuff that the computer will "learn" in a factory application is either turned off, or is part of the BCM that you don't have in a conversion.
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The body control module sends the signal to the PCM for VATS. That's why the guy had to reteach the computer (BCM).
I had the same problem when I first started mine and it was indeed VATS. I am not that familiar with the truck newer truck PCM's, but all LSx engines have an anti-theft feature that needs to be satisfied in some way or another.
What year is your PCM, was it reprogrammed and what did you do for a wiring harness?
I had the same problem when I first started mine and it was indeed VATS. I am not that familiar with the truck newer truck PCM's, but all LSx engines have an anti-theft feature that needs to be satisfied in some way or another.
What year is your PCM, was it reprogrammed and what did you do for a wiring harness?
Staging Lane
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From: Phoenix
I used a 2002 LQ4 and PCM in my conversion 95 Caprice that had Vats. But the Vats signal provided on a 1995 is not able to provide correct signal to the PCM. The signal is not the same as the one provided by the BCM to the PCM from the 2002 donar vehicle. The only way around the Vats is to have it programmed off. This was the information that was provided to me anyway through several sources. Though I did try the existing Vats signal from my 95 and it did not work.. I just wanted to confirm,,Hope it helps.. Roger
Joined: Sep 2004
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From: Downers Grove, IL
All the LSx series motors have VATS. If you did not delete it in the computer that is the problem. The truck motors must have the VATS DELETED, there is no way to bypass it since it is a serial data signal.
Originally Posted by G-Body
All the LSx series motors have VATS. If you did not delete it in the computer that is the problem. The truck motors must have the VATS DELETED, there is no way to bypass it since it is a serial data signal.
-Matt
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guys thanks for all the help. It turned out that the problem was vats and the ve tables were waaaaayyyy off. So with the vats off, it was too lean to keep running. Anyhow Scott from Intune Motorsports got it taken care of for me. Even though all the injectors still arent hitting. So that is the next feat.
