The fine folks who are posting in this thread are just trying to help you, and you're not giving them much to work with.
Since you're running a whiz bang scanner instead of a logger, things are a little different, but still workable.
Firstly, boot up the scanner and enter all the data, now, go to the data screen and press "n". That takes you back a page. Highlight "custom data list" and press "y" . Now on that screen, highlight "de-select all" and press "y"
Now, scroll down and highlight and then press "yes" on...
IAT
ECT
TPS
MAS
BARO
o2
An * will appear next to those items.
Press "n"
Select datastream, and press "y"
You should now be looking at a simplified data screen, and it will update quicker with less items selected.
Turn the key to the on position, but don't start the car.
What does the iat and ect read?
With the engine off and cold from sitting overnight, they should both read the same, and within a few degrees of the outside temp.
Next, check your baro, it should be ball park with the outside barometric pressure.
What does the tps read with no throttle?
What does the tps read with the throttle opened all the way?
Fire up the motor and monitor the ect, it should begin to rise fairly quickly, and evenly. After driving a ways, it should be up around 95 to 100*c (190-210*f)
Monitor the mas number, expressd as hertz (hz), as you run the engine thru it's paces.
What's the idle hz?
Whats the highest you see during a pull? (have someone else monitor that while you drive /ubbthreads/images/graemlins/wink.gif )
What does the o2 read at idle? At cruise? Under load?
While you're just driving around, eyeball the baro. it shouldn't be moving much, if at all unless you're changing altitude. If it's drifting all over the place, that's a valuable "tell".
We got's to have the numbers man, anything else is just guessing.
My magic eight ball says bad ecu caps/bodged mas wiring, with a side of broken wires at the ect down on the t-stat housing... /ubbthreads/images/graemlins/rofl.gif
Good luck and let us know what you find.
Slow and easy will solve this.
/ubbthreads/images/graemlins/poke.gif A little spelling and grammar wouldn't hurt either. This is the tech section after all. /ubbthreads/images/graemlins/wink.gif