hey guys. im looking at being apart of the group buy thats on atm for new harnesses but before im committed theres a few things i need to no. first off my car is a 93 model im pretty sure. as it use to hav a s1 ptu and the 94+ had s2 did it not? so wat other differences are there with the 89-93 to 94 and beyond harnesses? allso how hard is it to install a new harness with the engine still in and how much would it cost aprox to hav someone install it? thanks guyss xD
If you PM me your VIN number, I can do a FAST search for the right harness part number for your car, and also get a "session chain" which is a list of super seeding part numbers, and then you can find out what part number is being sold. I can then tell you what car its from then this link will show compatibility. And then you can start tracking down the difference and if there is an easy fix. http://www.conceptzperformance.com/Cart/description.php?II=2189&Car_Type=NIS300&UID= My experience was that I had to pull the whole dash out, but I was able to get away with leaving the A/C connected, saving a degas/gas expense. There is a recent thread covering this and heaps of older ones to. http://www.aus300zx.com/forum/showthread.php?p=1025754&highlight=harness+firewall+engine#post1025754
S1 and S2 CAS same apart from connector. You can use same connector from old harness but you need to find out harness diagram to match sensor inputs. I bought S2 CAS with S2 LHD EFI harnness.
An alternative viewpoint is that wiring harness replacement is largely unnecessary unless there has been some damage to the loom. Wiring is extremely hardy and if undamaged/pulled etc, the loom itself should last at least another 20+ years before replacement required. BUT, the engine bay wiring connectors themselves do almost always require replacement but this can be done cheaply and far easier than replacing the whole loom.
On the other hand, these looms are getting very hard to find... Replacing all the connectors in the engine bay will cost you what? 10 x injectors @ $10ea, 6 x coilpack connectors @ $15ea, plus other PITA plugs like TPS, CAS, knock sensor, VVT. You're looking at approx $250-$300, PLUS the PITA of changing them. So for a extra $100 or so (which our American mate is offering them at) you can have brand new plugs AND wires AND wrapping AND heat wrapping where required. I would rather pull a loom than put on new plugs. Higher chance of failure with soldered or crimped connectors. It will cost more to have a loom installed than what it would to have the plugs done. A few hours for the plugs, at least a whole day to do the loom for someone that knows what they are doing. I would consider this to be a DIY job due to the number of hours it takes. None of it is particularly hard, just fiddly and time consuming.
ive seen both sides of the coin here, with people that had running issues initially replacing some connectors on the old loom, which gave good results, and the same car having the whole loom replaced later on which yeilded better results again.......:zlove: i think that one thing that the can kill the engine loom is overheating, its seems car that have had a decent overheat or three seem to have very rotten looms. at the very least, the new loom will look pretty lol!!!!!:rofl:
I would say around 4 hours to change the harness. Depending on condition of your current harness, it is certainly a viable thing to do, if most of your connectors are corroded or damaged it wont cost too much more to fit a brand new harness.
thats why i started to considder to replace the whole harness. and drz your my soon to be new mechanic iv been having a chat to brisz about the great quality of work you do there and hav decided. so prepair for abit of work your way coz she aint in the best state.
Loom I've been looking at buying a new ECU for mine something like a Haltech I think. Can get the comp and loom for $900 and then have been quoted $1000 to fit and get running. not an easy job doing the whole loom and easier with the engine out for sure. I would do it myself but I am over playing around with the car at the moment. Andy
