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not much progress.. buddy erase the save scope files. so will have to do it again. meanwhile, i took all cam sensor, igniters, coil, rotors, crank sensor, and distributer out to exchange them with my buddies sc400 that was over heating. will be transfering everything over this weekend.. if this...

spent the whole day yesterday trouble shooting in circles. so, now im in the process of taking everything related to ignition to crank and cam sensors and swapping them with good ones.. is there anything i should look for while im in there?

i checked my timing just because... and the timing belt and cams are align. No skipped tooth or anything weird in that area.

Im sure i can get a file posted up since he had save in his scanner/scope system. I appologize, im not sure what you meant by this: ...Arrange a bulb to igniters' power so it's on when the igniters are on... I just tested the igniters w/ IGN ON and this is what i have as to power: Igniter 1...

more testing... and found out all 5 grounds connected to the ECU is working with the test light. test +B, +B1, BATT @ 12v , MREL @ 10v , IGSW @ 11.7v, all also lights up with the test light. This was tested with IGN ON and with ECU connected at the ECU rear plugs. may sound stupid but i'm not...

scoped the crank and cams they are operating correctly....

I somehow suspected Tweak’D Performance has done another mistake on the wiring harness. Is there anything in the wiring harness that needs to be look at?

There are 12V found on when IGN is ON @ IGSW, B+, & MREL. BATT is constant 12V. 12V is also present at the injectors and both coils. Both IGF1 & IGF2 has the 5v reference when the ignition is ON. I will be checking the grounds today. And possibly adding more grounds just in case. I also...

Thank you. I've been trying to borrow the scope and he is extremely busy at his shop. His wife as I type this is in labor as well.. Some progress, I order a 93 ECU w/o TRAC and plugged it in, same deal, no signal to IGT1 or 2. NO trouble codes are found. I went through the wiring schematics...

thanks for helping. i've been trying to get a hold of a scope. my buddy has a snap on scanner that has a scope setup on it but im not sure if it needs to be connected to the DLC1, which i dont have wire up. i've also read using a multimeter and setting it on AC voltage and then cranking the...

Manually trigger the igniters and I have sparks on both sides. im assume my issue is cams, crank sensor, wires or ECU?

Thank you for your reply.. I have not try to manually trigger the igniters. I will have to give that a try. My ECU # 89661-24240 from a 1992 SC400 40/40/40. The wire harness was sent to Tweak'd Performance where at 1st had many mistakes. I had rewire a few wires, and jump a few wires and trace a...

anyone please?

yes 12v @ the coil too.

yes i have 12v there

1UZ Swap: Got my harness back and needed to redo the sub harness that connects to the Cam and Crank Sensors in the front of the motor. It was brittle and waiting to snap. After the rewiring that part, my motor would not start. It cranks only. I recheck my connection with 3 different wiring...

**Tweak’D Performance’s Tricks, Lies, and Illusions** http://www.tweakdperformance.com/index2.html Anyhow, I also want to set the record straight, I am a backyard mechanic and am mechanically incline. It is not my profession, it’s my hobby. I had a 93 SC400 a long time ago, and found out it...

redid the wiring and did not find a problem. same problem, afm, tps, and rear right o2. so i switch the o2 sensor to the left side and same code appear for the right side. reset every thing and found out check engine light appear rite away again. feels like no signal that the sensor exist!

help! i'll will pay for any consultation services!

checked everything and splice the harness and i think it maybe normal! i even check the pin on the ecu for continuity and it beep. so time wasted, can someone confirm if this normal operations?