Story: I finished up getting everything installed on my car. Before it left the garage the car would idle perfectly. Now, it will not idle with the IAC control hooked up and the vacuum line from the intake manifold to the crankcase. If I take off the vacuum line from the intake manifold to the crankcase it will idle. Also, I hooked up my laptop to the SMT and turn the key to the ON position and checked for TPS movement, and it was fine. When the car is on and I apply gas to about 25-30%, the box that corrospond's on the SMT tuning map will not move. Can something be miswired on the SMT/Turbobox? I did tap the same 5v source for the turbo box and wideband, meaning both of these power wires are on one soldered connection. I've also changed out my MAF, TPS, and IAC with no success. Help!

 

try to disconnect the turbo box and put the short plug in. If that fixes the problem, it's the turbo box which you need to talk to denis.

 

I tried box the turbo box and short plug. It seems to idle fine with the turbo box hooked up.

 

by using the short plug your eliminating the turbo box,
so if it has the same problem with the turbo box or with the short plug then you need to look either at your wiring (smt-6 & turbo box) or an actual car problem (tps, tps connector, wiring

why do you need a 5 volt supply for your wideband? never came across the need to feed 5 volt to the wideband ?
you might be putting too much "stain" on the ecu 5 volt system

how did you wire up your map sensor? is it connected to the tps wire to get the 5 volt and ground?

 

There is a wideband output display. I will try to take that connector off. Also, I tapped into the ECU wiring for the 5v for the MAP sensor. I can try to tap into the TPS instead.

 

yamaha,

sorry, i've missed your call yesterday... i'll call you when i get a chance today

 

um... when you move your throttle to 25%, your throttle position sensor should be responding, as well as your MAF. What is the little box that you're referring to? Sounds like a problem in wiring. You should re-check your connections and

 

That's the turbo stuff DTN!! LOL
haha.gif

 

Well, I found my issues. After working on the car for another two hours tonight, I found the issue. After looking over the car, I looked at the downpipe, and there was NO primary oxygen sensor. He tapped the wiring harness into the secondary oxygen sensor. My narrowband was reading crazy rich at idle, and this will fix it.

 

So the problem was no first 02 sensor...

Now who tapped into what wrong?