97 850 Intermittent pauses at full throttle

Jush · Post by **Jush** » 04 Apr 2014, 08:16

So this is really a strange problem, I noticed it the other day when I was merging onto the freeway.

Here's what happens, I put the pedal to the floor, and I'll get up to about 90km/h, and for a brief moment, a sort of pause where there's no acceleration, then continues to pause at incriments of about 20km between from 90 upward. I really have no idea what the problem could be. I am running about 16 psi of boost and have removed the TCV. The computer in the car currently is a 4.4

This doesn't happen only on full throttle, as soon as there is an aggresive amount of pedal it starts doing this.

I will try and get a video up.

thanks
-Josh

Post by **matthew1** » 04 Apr 2014, 08:37

Sounds like fuel cutoff.

Jush · Post by **Jush** » 04 Apr 2014, 09:16

Dang, I guess Volvo doesn't want you to have too much fun.

Thanks, I guess I saw that coming, I'll set the boost pressure a little lower and try to find a happy medium.

The reason I wasn't sure if it was cut off was because I was told cutoff was much more aggressive i.e. "like hitting a wall".

Thanks and sorry for thread clutter.

Post by **matthew1** » 04 Apr 2014, 12:06

It's not exactly like hitting a wall, but it is abrupt cessation of power, until I back off the throttle.

Jush · Post by **Jush** » 04 Apr 2014, 15:18

Yeah now I know what it actually feels like myself, I heard from a couple of people in person that it was like hitting a wall, not really the case...

Thanks Matt.