I installed the SMT6 today and I got all the wires right. I started the car up and it ran really rough at idle. The idle was jumping from below 700 almost stalling, and up to 1600. It was all over the place.

When i put the bypass harness on, it ran perfectly like stock. So if the bypass worked then it must mean my wiring was fine.

I didn't want to drive it because the idle was so bad, and it stalled out a few times. I never raised the RPMs, so at idle the car should have been in open loop and not even getting info from the smt unit.

What happened? I am a total noob at piggyback tuning so please don't flame me. Keep in mind the maps were already set up for a maxima 3.0 Ecu (by Kevlo) which I am using. Therefore even the filter on the crank signal and the wave frequencies from all sensors should all have been matching.

http://www.badongo.com/pic/334579
http://www.badongo.com/pic/334582

Kevlo: if you are reading this, the green wave was the only one fluctuating at the bottom of the screen. The Blue and Red were flat lined at the bottom. Why was it not reading the "analogue in" and "analogue mod"?

 

Really? No one else has used the SMT?

 

call SRT buddy....at least get an estimate

 

Sounds like it's not reading the RPM's right. No cels?

 

did you find out whats wrong??
i just ordered mine smt6

 

Otran here on nicks comp.

Yeah, I still dont kno whats wrong. I heard that I should try to ground to the Intake manifold instead of the negative battery post. I also was told that I will need a grounding kit since the smt didn't work without it on the previous owners car.

I don't understand how that would help though considering the ground is directly to the Battery! OH well I have bigger problems right now. I just blew my first gear at the strip today, and now I can't drive my stupid car!!!!

 

thats sucks.
let me know if you find out please