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i had a JDM sender unit, i repalced it with a USDM one, then it didnt fix it.. i replaced the gauge and it works now

does anyone make fiberglass hoods for the supra? I'm looking for one in OEM shape. How much do they run?

not yet, I've replaced my igniter, that didnt do it.

yea, sounds similar to my problem with the CPS/ignition system.

I'll give anything a shot

hmm, so i've cleaned those wires (and all ignition related wires for that matter) checked my ECU harness for shorts, and replaced the ignitor, but i still have the problem. The problem is still occouring less and less, but it is still there. The only thing i can think of is to start replacing...

exactly, someone made 1jz coils work on the 7m. http://www.driftmotion.com/driftmotionignition.bmp

I believed you, but anyways that does seem to be the problem.. entirely. The problem was reduced drastically, but one time there was one stumble, and i got code 14. There was a constant stumble before. I'll try and get it back to my house soon so i can further diagnos the problem.

awesome, thanks:icon_bigg Perfect timing, i'm about to go to work, where my car sits. I hope this fixes it. If not i'll get out the solder gun.

hmm just a quick question, whats the best chemical to use on eletrical contacts? You know, to clean off the 18 years of grime.

yea, definately. I hope this solves it, i think i might even have a spare CPS clip from a junkyard Ma70 turbo.

haha great, i wish the car were here, i'd go play with it right now. Awesome. I'll post my results.

Kick ass, thats exactly what i'm looking for. So Jonathan, did you get code 14 at all? That sounds similar to my problem, but did you have the RPM signal spike and surge?

I checked it up and down, looked good. Looks are misleading.

I ordered a new igniter, I'm hoping this will take care of code 14? who knows. We'll see what happens.

Has anyone ever heard of the RPM signal dipping and spiking like this? HELP!

Where does the RPM signal come from? Is it the CPS?

:1zhelp:

I just dont know. I cannot find the problem. I jiggled the ECU wires i think that might have helped. I took some logs. You can easily see where i'm holding a consistant throtle possition but the RPM signal is jumping around. It doesnt make sense to me.

nah, its secure, i didnt mess with any wires when i was trying to fix it, but i did make sure everythign was plugged in securely.