Trying to ID my ECM (ECU) LS7 and diagnose a problem
09-14-2010, 06:37 AM
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Trying to ID my ECM (ECU) LS7 and diagnose a problem Guys, I REALLY need your help...
I have a 'special' LS7, 'special' because I believe it was a non-production version with forged pistons etc straight from the factory as a 'left-over' (2007) from a run for motorsport.
The ECU supplied seems to have a very small stamp between the vanes with the letter E98. I thought most were supplied with something liake an E40?
I cannot find any reference to the E98 if that what it is on the net. This ECU came with the fuse box, and two relays (1 x pump + 1 x A/C)
Why am I asking? Good question... The engine is up and running now - it starts and idles but totally ignores the FBW throttle-pedal!
The Throttle-body has a silver throttle plate. (I believe some used for motor-sport have gold ones), and reacts to me gently pushing the plate open to returnb to closed.
I have checked all the connectors for bent, pushed in or broken pins, and none of the fuses has blown.
SO... is this the right ECU/Throttle-body/Throttle pedal combination? I have no idea...
Please help!!!!!
I have a 'special' LS7, 'special' because I believe it was a non-production version with forged pistons etc straight from the factory as a 'left-over' (2007) from a run for motorsport.
The ECU supplied seems to have a very small stamp between the vanes with the letter E98. I thought most were supplied with something liake an E40?
I cannot find any reference to the E98 if that what it is on the net. This ECU came with the fuse box, and two relays (1 x pump + 1 x A/C)
Why am I asking? Good question... The engine is up and running now - it starts and idles but totally ignores the FBW throttle-pedal!
The Throttle-body has a silver throttle plate. (I believe some used for motor-sport have gold ones), and reacts to me gently pushing the plate open to returnb to closed.
I have checked all the connectors for bent, pushed in or broken pins, and none of the fuses has blown.
SO... is this the right ECU/Throttle-body/Throttle pedal combination? I have no idea...
Please help!!!!!
09-15-2010, 03:54 AM
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Yes it has just been confirmed as being the E38, so thanks...
However I have an error code that will not go away - p0641
This is the first time after receiving the engine 2 years ago that it has been installed and started. I have checked all connections but it keeps coming back.
Any idea where I could get a wiring diag and pin-out ID for the loom/ connectors & ECU? That would help a huge amount and allow me to check all the pins on the various connectors!
cheers
Keith
However I have an error code that will not go away - p0641
This is the first time after receiving the engine 2 years ago that it has been installed and started. I have checked all connections but it keeps coming back.
Any idea where I could get a wiring diag and pin-out ID for the loom/ connectors & ECU? That would help a huge amount and allow me to check all the pins on the various connectors!
cheers
Keith
09-17-2010, 02:36 AM
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Right Guys, and with your useful advice - I have got to the bottom of the problem - but raises another!
Checking the voltage on the ref circuit I found 1.4 volts!
So through a process of elimination I found that no sensors seemed to be the culprit????
Then I hd a flash of inspiration and disconnected the alternator plug...and voila - 5v ref sprang back into life!
...and the engine started and revved!
..So, what the heck is going on with the Alternatorfield duty and turn on circuit?
Any bright ideas?
cheers
Checking the voltage on the ref circuit I found 1.4 volts!
So through a process of elimination I found that no sensors seemed to be the culprit????
Then I hd a flash of inspiration and disconnected the alternator plug...and voila - 5v ref sprang back into life!
...and the engine started and revved!
..So, what the heck is going on with the Alternatorfield duty and turn on circuit?
Any bright ideas?
cheers
