Atessa Acting Weird

[rtune]

On an R34 gtr ..

After a clutch swap, atessa under load is pushing power to the front

then removing it, and cycling back and forth like that -- creating a bad feeling

on the road under boost. torque meter shows it pushing power to the front.

There are no warning lamps lit.

ECU has been changed over, no difference.

The atessa fluid has been changed twice, and bled several times..

G-sensor checked for correct voltage.. anyway, g-sensor wasn't disturbed.

I believe each of the 4 speed sensors have been checked, or are being checked.

Since there is no 4wd warning light, there are no error codes to scan for..

On the dyno, the problem isn't really noticeable. Just on the road.

Any other ideas on what it could be? what to check for?

Also changed: rims (just a bit wider), new tires (same profile), new brake kit

(was working ok after brake kit swap, I think). And lastly, more power. But not

a shedload more power.

[blind_elk]

What size are the new rims? What size tyres on the new rims?

[rtune]

What size are the new rims? What size tyres on the new rims?

new rims are same size, 18" and 265/35s instead of 245/35s. I think 9.5J or 10J ..

[blind_elk]

Try swapping the rims F<->B

[rtune]

problem allegedly solved!

was TPS voltage not correct at the atessa ecu.. causing wacky behavior, but no warning lights.

[heller44]

Caused by.. bad connection?

Edited July 25, 2009 by heller44

[rtune]

Caused by.. bad connection?

I'm trying to find out. I hope they didn't just reset the TPS, which they should have done

ages ago, and are blaming something else to make it seem harder!