Purge valve...activation signal?
Discussion
From looking at the various wiring diagrams around, it looks to me like the purge valve has a +12v feed with ign on and a switched -ve from the ecu (no idea what the conditions are for the valve to be activated). Anyone able to confirm this please?
Hoping to emulate from the Emerald, which has a couple of programmable outputs, but until I suss what effect it has on running (and what the trigger conditions should be), am thinking about just rigging a simple manual switch as an interim.
Hoping to emulate from the Emerald, which has a couple of programmable outputs, but until I suss what effect it has on running (and what the trigger conditions should be), am thinking about just rigging a simple manual switch as an interim.
Pupp, I'm going through the same thing with the Emerald set up at the moment. My purge is wired in to Pin 21, auxout 3/inj driver 6. It was labelled as purge on the old M3DK manual.
I've gotta work out how to include the output in the map and was struggling with what the conditions were to open it, but Dave's comments seem to be make sense to me.
The purge wiring is located normally on the o/s main chassis spar underneath. It is joined form the valve to the engine loom by a multiplug around the oil filter area.
This is all on a Griffith though, not a Chimaera, but not like to be very different.
I've gotta work out how to include the output in the map and was struggling with what the conditions were to open it, but Dave's comments seem to be make sense to me.
The purge wiring is located normally on the o/s main chassis spar underneath. It is joined form the valve to the engine loom by a multiplug around the oil filter area.
This is all on a Griffith though, not a Chimaera, but not like to be very different.
Johno said:
Pupp, I'm going through the same thing with the Emerald set up at the moment. My purge is wired in to Pin 21, auxout 3/inj driver 6. It was labelled as purge on the old M3DK manual.
I've gotta work out how to include the output in the map and was struggling with what the conditions were to open it, but Dave's comments seem to be make sense to me.
The purge wiring is located normally on the o/s main chassis spar underneath. It is joined form the valve to the engine loom by a multiplug around the oil filter area.
This is all on a Griffith though, not a Chimaera, but not like to be very different.
Cheers, that's useful... TBH, I was hoping to pick up the wiring in the footwell. Just having a 'mare working out what to nuke and what to keep I've gotta work out how to include the output in the map and was struggling with what the conditions were to open it, but Dave's comments seem to be make sense to me.
The purge wiring is located normally on the o/s main chassis spar underneath. It is joined form the valve to the engine loom by a multiplug around the oil filter area.
This is all on a Griffith though, not a Chimaera, but not like to be very different.
Johno said:
Are you making your own loom up ?
Have the half-made one from Emerald... have split the tails into two bundles, those for the engine bay and those for the footwell/dash area. Trying to remove and wire as I go. Suppose I was hoping the FI stuff would be separate to other ancillaries like the alternator etc, would have been nice to just pull a complete and now surplus loom out but hey ho I suggest the best way would be to take the whole loom out, and them strip it back, put in your new bits and then re-seal up as you prefer.
Reasoning being that things like the purge are part of the existin gengine loom and trying to keep everything as tidy as possible is the way to go if possible. There is so much of the existing loom that can just be slung in the bin it's not worth leavng it in there.
The harness has a whole load of stuff for LR's etc that the TVR just doesn't use.
Additionally, things like the purge are bedded into the loom and it's be a lot easier to work them through on the bench. I'm not sure of the bulkhead bung on the Chimaera, but if it's like the Griffith then trying to get anything through it after spending some time making it all nice could cause issues. Simpler to take out, rip out all the stuff not needed, add in new bits, feed the new ECU connector into the dash and then lay in the rest of the loom.
Again, not sure on the Chimaera dash board arrangement, and not at my folks to look at Dad's but I have located the Emerald above the glovebox rather than in the footwell on a bracket I fabbed out of the side of our old oven
That way it's never going to have any danger of getting wet in the footwell or kicked, and I hate all that loom stuffed in down there.
For the 2 stage cooling I took out the main power feed from the back of the fuseboc blocks and had my loom made up with connectors to attached them in the footwell/dash rather than running more cable to the front of the car.
I've done a whole bunch of other stuff as well, feel free to ask. Hoping to fire mine some time next week. 2 weeks before it's due at Emerald for full mapping.
Reasoning being that things like the purge are part of the existin gengine loom and trying to keep everything as tidy as possible is the way to go if possible. There is so much of the existing loom that can just be slung in the bin it's not worth leavng it in there.
The harness has a whole load of stuff for LR's etc that the TVR just doesn't use.
Additionally, things like the purge are bedded into the loom and it's be a lot easier to work them through on the bench. I'm not sure of the bulkhead bung on the Chimaera, but if it's like the Griffith then trying to get anything through it after spending some time making it all nice could cause issues. Simpler to take out, rip out all the stuff not needed, add in new bits, feed the new ECU connector into the dash and then lay in the rest of the loom.
Again, not sure on the Chimaera dash board arrangement, and not at my folks to look at Dad's but I have located the Emerald above the glovebox rather than in the footwell on a bracket I fabbed out of the side of our old oven
That way it's never going to have any danger of getting wet in the footwell or kicked, and I hate all that loom stuffed in down there.
For the 2 stage cooling I took out the main power feed from the back of the fuseboc blocks and had my loom made up with connectors to attached them in the footwell/dash rather than running more cable to the front of the car.
I've done a whole bunch of other stuff as well, feel free to ask. Hoping to fire mine some time next week. 2 weeks before it's due at Emerald for full mapping.
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