SO STUMPED! starting problem, help pls..

[DawgB0]

im 100% on track.. all my parts is working as well cuz all od them got hot as i keep crankin it.. it keep tryin to engage but something keep it back to cranking but click to start everytime it get to TDC so im stumped.. harass i can tell it will need to be replaced soon bt not nessecery

[DawgB0]

help me out here i think im wrong wit the wires..

3 tans to orange/blk
white to yellow
green to blue/yellow
blk to blue/red

my gut says im wrong abt it.

[DawgB0]

i switched redblue to blk n green t0 blueyellow it keep fire then crank then fire then crank WTF is that??

[DawgB0]

it idles finally but will die soon as i let go the gas even i dont have vaccum leak???

[DawgB0]

yall think my crankshaft is 180 out?? another day i tried 180 the crankshft it wont try to fire up til i 180 it back where it was, it fires.. everybody pls help me out im jus a problem away from able drive it

[btwilson86]

180 out? It is not possible to be 180 out if you set your timing per that link I posted above. As I said earlier when I posted that link, verify your timing is right, then we can move on from there.

And why are you switching wires around? That is nearly a sure-fire way to fry your electronics. Do a Google search, find wiring diagrams. Connect the wires properly, and stop guessing before you kill your Supra.

[DawgB0]

aight then i have timing perfect, have all sparks, have fuels cuz the smell is too damn strong, and it really firing up after i replaced new copper plugs from ngk. oh yeah and for cps somewhere i found wiring for cps is red to green, blue to red, yellow to yellow(only match color), n blk to white, but im leave the wiring all ALONE!!

while on the TSDM or sumthing it says red to red, green to blue, blk to yellow, n yellow to white?

[btwilson86]

Alright, I'll see if I can verify that wiring is correct.

[btwilson86]

Well, I've read that the wiring colors are different between pre89 and 89+ CPS connectors. From what I read, how you have it wired right now is for pre89. I haven't yet found the correct wiring for 89+ CPS. Your first post says this is a 92 Supra turbo, can you tell me what color plugs your wiring harness has at the ignitor? That will tell us if you have a pre89 harness or 89+ (it's possible it was changed at some point, which could make wiring hell for this car)

[btwilson86]

After much research (you're welcome) I have concluded that on a 92 Supra Turbo, you're wiring is correct:

Blue - Red
Red - Green
Yellow - Yellow
Black - White

I gathered this info from a couple of websites, but I would appreciate it if anyone with a post 89 Supra can verify that is how their wiring is connected.


So if your wiring is correct, and your mechanical timing is set, and your CPS is installed as described in the link above, have someone crank the car as you slowly turn the CPS. If you get it to fire, try to keep it running with some adjustments at the CPS. If that works and it runs at idle, let it warm up and set the ignition timing as described in the MKIII FAQ