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Its Me...Its Me
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631 Posts
Discussion Starter · #1 ·
the damn thing wont start/spark...The wire harness is so dry rotted/corroded and old that the wires are just breaking apart. I found a JDM motor with a better cam pos sensor and installed it (cps not the whole motor) today...still no spark at the cp... I'm stumped! Recommendations so far have included STAND ALONE $1600 or new harness $1800 (dealer)! Any other suggestions on what to trouble shoot or what can be done? The cpu is giving off code 22 (water coolant temp, but the radiator hasn't been installed yet)
Thanks
 

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451 Posts
the connector that goes to the coil pack need to be in and connected.
the ground wire from the coil pack.
keep an eye out on e-bay for a used harness

Steve
 

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535 Posts
You check to see if the ignitor is good? Pull the cap off the CPS and clean the contacts. If the coil packs aren't getting a spark to the plugs, check to see if the ignitor is good.
 

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5,231 Posts
Very common for the 4 wires going to the CPS to be all Fed up. Might even have to direct-connect them, without the brittle connectors. If you're at that point with your harness, replace it SOON!!! I have had alot of "ghost" issues that ended up being related to the Fed up harness I had. Swapped parts and spent alot of $$, but without a good harness, it's just a waste. Once I replaced it, did not have ANY other issues.... Good luck!!
 

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Mr. 2JZUL8R
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6,024 Posts
if ur wiring harness is that f'ed up then replace it ASAP! i can get u a brand new harness for $600 or less! contact me if needed! :cool:
 

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Its Me...Its Me
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631 Posts
Discussion Starter · #9 ·
yeah my boy has a used one that came with his JDM 7m...it's half of a harness so i'm putting that in tomorrow to see if that works
 

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Not ur jizz, not ur bizz
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6,571 Posts
Howie, did you forget to tighten the bolt that holds the ground wire down attached to the wiring harness. Its right under the rear intake manifold..around cyl 5-6.

Give that a look, thats what my problem was..the ground wire was there, i just needed to tighten the bolt and then i got my spark back, bitch started right up.
 

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Your Neighborhood Pikey
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3,341 Posts
I've got a harness from my 87 parts car that I'll sell you if you need it. just let me know. I hate to see Supras dead...

- Hams.
 

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Its Me...Its Me
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631 Posts
Discussion Starter · #12 ·
HamsMKIII said:
I've got a harness from my 87 parts car that I'll sell you if you need it. just let me know. I hate to see Supras dead...

- Hams.
thanks, I'll let you know if this doesn't go through. That is a MINT looking supra you have there...beauty. Love the guts!!!
 

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Its Me...Its Me
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631 Posts
Discussion Starter · #13 ·
I got the whole harness now (from firewall throughout the motor) and the elec specialist is supposed to do it friday...hope that'll happen for new years!!!
 
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