[L.A.saaberino]

Wondering if this rings a bell for anyone.
My Maptun stage 1 05 9-5 aero is performing great at high speeds, however if I’m going around 70 mph and let off the accelerator for a few seconds then floor it, sometimes I get the revs up, no power, and a whizzing sound. No CEL.

Just replaced the fuel pump and CPS.

Thanks!

 

[steve12955]

Auto or manual?

 

[L.A.saaberino]

Auto or manual?

Auto

 

[steve12955]

Possible lock-up torque converter issue: do you see tach needle increase quickly with no increase in speed - like it’s in neutral momentarily?

 

[L.A.saaberino]

Possible lock-up torque converter issue: do you see tach needle increase quickly with no increase in speed - like it’s in neutral momentarily?

Fairly certain I see the tach go up when this occurs.

 

[L.A.saaberino]

With no increase in speed.

 

[L.A.saaberino]

Possible lock-up torque converter issue: do you see tach needle increase quickly with no increase in speed - like it’s in neutral momentarily?

@steve12955 yes. So this behavior would point to the torque converter?

 

[steve12955]

Hard to say. Only clue is it happens at higher speed when torque converter is supposed to be engaged and you see a temporary increase in RPM.