PCM replacement ???
05-23-2011, 08:49 PM
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Back Story...I did a engine swap,I put the LS2 in a Land Rover Defender 90. Got swap done and the engine kept going into limp mode or as I have heard now possibly "reduced power" mode. I took it to a tuner to get it tuned out. They got it tuned, one prob is that it will run fine one pull then next pull it will lose tune go into reduced power mode. You can turn off and on and it's back to normal. So they are telling me I need a new PCM. Also telling me with new PCM I have to buy a DBW pedal that matchs.
05-23-2011, 09:10 PM
#6
Find another tuner
They had to miss something in the tune
For what you want done, any one of the mail order tuners that do LS2 PCM's could help you out, Jessie Bubb or Frost come to mind
If the PCM is bad it is unlikely it will go in to abuse or reduce power mode some of the time
Is it setting any codes or did the tuner turn them all off?
Do you have any way to log it?
Is the VSS hooked up?
They had to miss something in the tune
For what you want done, any one of the mail order tuners that do LS2 PCM's could help you out, Jessie Bubb or Frost come to mind
If the PCM is bad it is unlikely it will go in to abuse or reduce power mode some of the time
Is it setting any codes or did the tuner turn them all off?
Do you have any way to log it?
Is the VSS hooked up?
05-23-2011, 10:41 PM
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Find another tuner
They had to miss something in the tune
For what you want done, any one of the mail order tuners that do LS2 PCM's could help you out, Jessie Bubb or Frost come to mind
If the PCM is bad it is unlikely it will go in to abuse or reduce power mode some of the time
Is it setting any codes or did the tuner turn them all off?
Do you have any way to log it?
Is the VSS hooked up?
They had to miss something in the tune
For what you want done, any one of the mail order tuners that do LS2 PCM's could help you out, Jessie Bubb or Frost come to mind
If the PCM is bad it is unlikely it will go in to abuse or reduce power mode some of the time
Is it setting any codes or did the tuner turn them all off?
Do you have any way to log it?
Is the VSS hooked up?
Will see about log.
The VSS is not hooked up.
Do you have contact info for Jessie or Frost?
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05-24-2011, 05:01 AM
#8
Frost is Tunesbyfrost
Both are users and sponsers on here
IIRC you need the VSS hooked up to prevent it from going in to abuse mode, otherwise it thinks you/re sitting there reving it up
05-24-2011, 08:06 PM
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Upon further explanation the issue is that when u crank it the first time it runs "bad/weird" then if you turn off and right back on it runs fine.
They are saying the vin from the source car is programed into the pedal and PCM so I would have to replace both and have a GM dealer program both to a matching vin......Is this correct?
Thx for the help!
05-24-2011, 08:20 PM
#11
There is no way to program the VIN in to the pedal, it only has a couple of variable resisters in it, to follow the pedal movement. There is no memory chips or electronics to program
Here is the first page on the wiring diagram for the engine control for a 2005 GTO. It shoulds the pedal as a couple resistors, that goes directly in to the PCM
If the tuner doesn't understand how it works, I'd really doubt his ability to understand it well enough to tune it
Here is the first page on the wiring diagram for the engine control for a 2005 GTO. It shoulds the pedal as a couple resistors, that goes directly in to the PCM
If the tuner doesn't understand how it works, I'd really doubt his ability to understand it well enough to tune it
05-24-2011, 10:09 PM
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Do I have to order the combo?
With the vague description I got and passed on above...Do you think it is a PCM problem or they're just incompetent?
05-24-2011, 10:22 PM
#15
There should be no reason to have to replace the pedal, unless its giving you some DTC, that it has an issue.
There is nothing to program in the pedal
Unless they're aware of something we're not aware of and i doubt it, they're incompetent
Before you buy anything give Jessie of Frost a call.
Jessie is more free with his number then Frost is, not to mean that Frost is any less of a tuner, but he just has differant bussiness practices
Jessie's number is Five Seven Four Two Six Seven Three Six Three Zero
There is nothing to program in the pedal
Unless they're aware of something we're not aware of and i doubt it, they're incompetent
Before you buy anything give Jessie of Frost a call.
Jessie is more free with his number then Frost is, not to mean that Frost is any less of a tuner, but he just has differant bussiness practices
Jessie's number is Five Seven Four Two Six Seven Three Six Three Zero
05-24-2011, 10:37 PM
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There should be no reason to have to replace the pedal, unless its giving you some DTC, that it has an issue.
There is nothing to program in the pedal
Unless they're aware of something we're not aware of and i doubt it, they're incompetent
Before you buy anything give Jessie of Frost a call.
Jessie is more free with his number then Frost is, not to mean that Frost is any less of a tuner, but he just has differant bussiness practices
Jessie's number is Five Seven Four Two Six Seven Three Six Three Zero
There is nothing to program in the pedal
Unless they're aware of something we're not aware of and i doubt it, they're incompetent
Before you buy anything give Jessie of Frost a call.
Jessie is more free with his number then Frost is, not to mean that Frost is any less of a tuner, but he just has differant bussiness practices
Jessie's number is Five Seven Four Two Six Seven Three Six Three Zero
05-24-2011, 10:40 PM
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I haven't messed with ls2 computers much but I gotta agree with 2xls3, sounds like your tuner doesn't know what he's talking about. From what I understand, if your motor on your dbw throttle body goes out you just replace it. You don't have to buy a new computer if that happens, so why would you need to buy a new dbw setup if your computer is bad? That said, if I were you i'd contact one of the above mentioned tuners.
05-24-2011, 10:44 PM
#18
