Hello I just swapped a 1jz from a soarer into my s13, i been trying and trying to get a spark but no luck...

my wiring was done at tech2motorsports (not sure if u guys are familiar with them but they offer the wiring service) anyhow to make the story short i got the wiring back once and they had messed up with a couple of plugs so i had to send it back and i just got it a week ago and they still messed up on one plug which they said it was not needed, i would just like to double check on that if i have been wasting all this time trying to start it whit out that plug been hooked up. Its on the intake side and its right next to the oil filter, brown on color and i read about it its something to do with vacuum switch i can take a picture of it if your not sure which one i mean.

anyways i just cant get it to spark... i also made a mistake by when i was putting on the alternator i accidently tightened it over the wire that goes for the crank angle sensor i bealive? its two wires... they must have been sparking because i did mess em up putty bad but i was able to connect them right i just dont know if that sparking probably messed up the sensor?

anyways i tried a different ECU, map, ignitor... and im just running out of things to do... any suggestions are more then welcome! thanks!
- Mario

 

sounds like a vsv plug. it isnt needed. do you have +12v to the coils? do you have +12v to the ignitor? are all your grounds hooked up? are all your cam and crank sensors plugged in? are the injectors firing? need more info before we can figure out whats wrong. though at the moment id say the wires to the crank sensor are prolly the problem.

 

Your right williamb Ill test the voltages next, ya its all plugged in expect that plug i mentioned. All grounded as well. So there is a quite big chance that maybe while i was trying to start it and those wires to the crank angle sensor were all messed up and probably sparking for all i know on the alternator that messed up the sensor right? Like i said i did manage to hook it up but who knows if the damage was already done. If so where can i buy one of those to replace it? Thanks again for the help ill post back when i try the voltages.

 

those wires wont really spark. not much voltage to them. iirc its a vr type sensor so has 12v going on one wire and the other comes back as the ground and the ecu measures the "blips" in the signal. the wires should have been shielded. as for the connector, toyota dealers can order the plastic connector and the pins to crimp onto the wires. crimp the pins on then insert them into the connector. the old connector should have a small part number on it. should help. if you go to supraforums, either of the 2 toyota dealerships listed in the vendor section should be able to get it for you.

now if you have 12v to the coils and ignitor. check the ground pin of the ignitor for continuity to ground. most spark issues are a bad ground somewhere. on 7m's theres a cluster of grounds bolted to the intake manifold at the rear of the engine. if they are loose it wont run. the jz's have these ground clusters too but im not 100% where they are on the engine. prolly a similar location. and you need a large ground from the block to the neg terminal of the battery and from the head to the body and body to the battery. these are very important!

another thing, since this is a swap into a 240, make sure the b+ and b wires have +12v with the key on. if the ecu doesnt have power nothing will run. i fixed the wiring on a 7mgte swap into a toyota truck that was missing 12v to the b+ line and a few other small issues.

 

Thanks again william, I'm going to look it over hopefully this week and ill get back to ya, i really hope its something simple that i have missed as this been giving me nothing but headache for a long time and i really need to get it running as my daily driver is already on its last breath. Thanks again buddy ill let you know what happened.

 

Ok well it seems to me we are getting 12v, to the coil but no spark could the crank angle sensor be bad, is this what the cause could be crank angle sensor failure??......so the question is if the crank angle sensor is bad it wont send spark to the coils correct???

 

the crank sensor could be bad, but wouldnt go bad because of the issue with the alt. id check the wiring to the plug again to make sure it is repaired correctly. but first, did you check the voltages at the ecu and your grounds? the coils and ignitor dont get power from the ecu, so just because they have power doesnt mean the ecu is on.

 

did you check for 12v at the ecu yet? or did you get it running already?

 

you should of had sean at myjzswap do the wiring harness