Discussion
Just so all you out there can have another giggle at my expense...
Webby knows my pain already but I will share it with you the reader also!
I am currently writing out "I must NOT do things that are really complicated and maybe unnecessary, and maybe out of my league!" a thousand times, in my exercise book!
Why? Cos I had a BRILLIANT idea a month or so ago, to extend my LS7 engine loom (pre-factory) so I could move the ECM from the engine compartment into the cab, all cozy-like!
Easy- I convinced myself!
And so, I explored all avenues of approach until I came across a nice man who had a much longer loom, and sold it to me for a lot less than the cost of a new one. I knew that some of the connectors where not exactly the same (being a little older I think) so I bit the bullet and left the engine end of the original all connected and set about mapping on paper all the different wires betwix new and old, mainly because the longer loom did not use two-colour-coded wires as my original did!
Ahh! but that should be a nice easy challenge, I said to myself, whilst raising the snips and attacking the wires with abandonment!
Two days later, bleary eyed, with colours of all hues splayed out in front of me like a porcupine on steroids, I surveyed my destruction with a certain amount of growing horror!
Nevertheless, with two cans of 1664 in my belly I renewed my efforts to try to match the rampant sea of colours to individual pinouts at the ECM business end, whilst finding the equivalent individual in the massive bundle of worms that was now the free-end of the snipped off engine loom!
With more that my fair share of over-confidence I set about splicing each and every individual likely pair together with the soldering iron and heat-shrink, with Steve D's comment ringing in my ears about making each join at a different place, thus not ending up with what looks like a snake with a rather large meal in its belly!
Another 5 days later, now withering in the enthusiasm department, together with agonising back pain.. I was on the last leg of my mammoth task! Fitting and sorting the relays, the OBDII connector, the Throttle loom and the fusing.
A day or two later, after dreaming of the big start-up..out I went to the garage...switch on the ign..aaaaaand........NOTHING!
BUM!
No OBDII light, no relay noise, no pumps...but a throttle flap clunk! Yeay!
Traced the +v feed back to the ECM - Check!
Traced the +v ign feed back to the ECM - Check!
traced the earth back the the ECM - Check!
Hmmmmmm.....
OK, so now I will have to go through the 5v pins yes!
"I must NOT do things that are really complicated and maybe unnecessary, and maybe out of my league!"
"I must NOT do things that are really complicated and maybe unnecessary, and maybe out of my league!"
"I must NOT do things that are really complicated and maybe unnecessary, and maybe out of my league!"
"I must NOT do things that are really complicated and maybe unnecessary, and maybe out of my league!"
"I must NOT do things that are really complicated and maybe unnecessary, and maybe out of my league!"
"I must NOT do things that are really complicated and maybe unnecessary, and maybe out of my league!"
"I must NOT do things that are really complicated and maybe unnecessary, and maybe out of my league!"
"I must NOT do things that are really complicated and maybe unnecessary, and maybe out of my league!"
"I must NOT do things that are really complicated and maybe unnecessary, and maybe out of my league!"
........ another 989 lines to go...
aperbag
Webby knows my pain already but I will share it with you the reader also!
I am currently writing out "I must NOT do things that are really complicated and maybe unnecessary, and maybe out of my league!" a thousand times, in my exercise book!
Why? Cos I had a BRILLIANT idea a month or so ago, to extend my LS7 engine loom (pre-factory) so I could move the ECM from the engine compartment into the cab, all cozy-like!
Easy- I convinced myself!
And so, I explored all avenues of approach until I came across a nice man who had a much longer loom, and sold it to me for a lot less than the cost of a new one. I knew that some of the connectors where not exactly the same (being a little older I think) so I bit the bullet and left the engine end of the original all connected and set about mapping on paper all the different wires betwix new and old, mainly because the longer loom did not use two-colour-coded wires as my original did!
Ahh! but that should be a nice easy challenge, I said to myself, whilst raising the snips and attacking the wires with abandonment!
Two days later, bleary eyed, with colours of all hues splayed out in front of me like a porcupine on steroids, I surveyed my destruction with a certain amount of growing horror!
Nevertheless, with two cans of 1664 in my belly I renewed my efforts to try to match the rampant sea of colours to individual pinouts at the ECM business end, whilst finding the equivalent individual in the massive bundle of worms that was now the free-end of the snipped off engine loom!
With more that my fair share of over-confidence I set about splicing each and every individual likely pair together with the soldering iron and heat-shrink, with Steve D's comment ringing in my ears about making each join at a different place, thus not ending up with what looks like a snake with a rather large meal in its belly!
Another 5 days later, now withering in the enthusiasm department, together with agonising back pain.. I was on the last leg of my mammoth task! Fitting and sorting the relays, the OBDII connector, the Throttle loom and the fusing.
A day or two later, after dreaming of the big start-up..out I went to the garage...switch on the ign..aaaaaand........NOTHING!
BUM!
No OBDII light, no relay noise, no pumps...but a throttle flap clunk! Yeay!
Traced the +v feed back to the ECM - Check!
Traced the +v ign feed back to the ECM - Check!
traced the earth back the the ECM - Check!
Hmmmmmm.....
OK, so now I will have to go through the 5v pins yes!
"I must NOT do things that are really complicated and maybe unnecessary, and maybe out of my league!"
"I must NOT do things that are really complicated and maybe unnecessary, and maybe out of my league!"
"I must NOT do things that are really complicated and maybe unnecessary, and maybe out of my league!"
"I must NOT do things that are really complicated and maybe unnecessary, and maybe out of my league!"
"I must NOT do things that are really complicated and maybe unnecessary, and maybe out of my league!"
"I must NOT do things that are really complicated and maybe unnecessary, and maybe out of my league!"
"I must NOT do things that are really complicated and maybe unnecessary, and maybe out of my league!"
"I must NOT do things that are really complicated and maybe unnecessary, and maybe out of my league!"
"I must NOT do things that are really complicated and maybe unnecessary, and maybe out of my league!"
........ another 989 lines to go...
aperbag I feel your pain Keith! Whilst I never took on anything as extensive as an ECU rewire, my numerous other wiring additions were cause of many a night of head scratching!
In terms of solving the issues (and I know I'm preaching to the converted), take a methodical approach and test/retest everything. Often it's a missed earth or something that causes no end of havoc.
Good luck bud!
In terms of solving the issues (and I know I'm preaching to the converted), take a methodical approach and test/retest everything. Often it's a missed earth or something that causes no end of havoc.
Good luck bud!
b
d! I wired up a Motec to a suzuki gsxr turbo a few years back, done a solid job every thing cut to length loom tied heat shrunk looked fantastic.
Came to start, it whizzed over and back fired a couple of times.
Took me six weeks to find I had lost the cam sensor signal through a plug.
d! I wired up a Motec to a suzuki gsxr turbo a few years back, done a solid job every thing cut to length loom tied heat shrunk looked fantastic.Came to start, it whizzed over and back fired a couple of times.
Took me six weeks to find I had lost the cam sensor signal through a plug.
Having seen your post Keith I got my new engine loom out to check it will be long enough to reach the ECU in my side pod. Phew!!!!!
Where have you put your ECU?
There should be no need to extend it even if you are not siting the ECU in the engine bay. It could go behind the driver's seat or in the drivers sidepod (I have no luggage containers though) without extension.
Probably not what you wanted to hear after all that work and looking at the spaghetti I admire your balls taking it on>
Paul
Where have you put your ECU?
There should be no need to extend it even if you are not siting the ECU in the engine bay. It could go behind the driver's seat or in the drivers sidepod (I have no luggage containers though) without extension.
Probably not what you wanted to hear after all that work and looking at the spaghetti I admire your balls taking it on>
Paul
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