Hi all. I've briefly mentioned this in a previous thread but can give more detail now.
I have a pronounced pause in acceleration at 5k revs in 3rd (and in 4th if I'm ever pushing on that much).
This only seems to occur when accelerating in full auto mode.
Specifically...
The car passes 5k in second smoothly then changes up to 3rd. It hits 3rd at 4k ish and begins to accelerate. As it reaches 5k there is a slightly more gruff engine note, acceleration pauses for maybe a second or so then the car pulls well and very smoothly until the next change up.
In contrast. If I am in manual and climb from much lower revs through 3rd gear, it seems to sail past 5k without much problem.
Martyn volvokid was very kind and loaned me a fuel pressure sensor and a boost control sensor (attached side of air box). Today, I first swapped in the boost sensor with no effect, then the fuel pressure sensor, again no effect. So these should be excluded.
Any ideas?
Why the difference between hitting 3rd at the 4k mark and accelerating from lower revs? Feels a little like the car has to 'settle' into the next gear then settle again.?
Cheers.
EDIT:
Have cleaned MAF sensor.
Plugs and two coil packs 20k ago (fault still there)
General service within last few weeks
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