My S2 is playing up a little bit at the moment and it's starting to annoy me... I've searched through lots of posts but I can't quite work out of the symptoms are the same as everyone else.
It seems to 'bog down' when I apply the throttle, though not all the time. When I'm driving at a constant 30mph in 4th, a very light application of throttle makes the car actually slow down slightly, then pick up again a few seconds later. This also happens sometimes when I'm driving it a bit harder.
Yesterday I'd pulled out of a junction and was at about 1500 rpm in 1st. I put my foot to the floor and it accelerated, but not very hard. When it hit about 4000 rpm it was almost like someone had flicked a switch and it suddenly picked up.
I fitted a boost gauge to see what's going on, and the boost seems relatively consistent. In 2nd, 3rd and 4th it boosts to 16-18 psi ish (1.1 - 1.2 bar). In 1st, 5th and 6th I've usually got more important things to look at than the gauge.
I've cleaned the MAF (thanks to Vonbeck for the MAF BAF idea) and that seemed to make little or no difference. I don't think the previous owner did the Mark H mod, so that's next on the list.
I know the usual things that go wrong are the WGFV, the DV and the IC O ring, but would these have an effect when it's off boost?
Where should I start looking?
It seems to 'bog down' when I apply the throttle, though not all the time. When I'm driving at a constant 30mph in 4th, a very light application of throttle makes the car actually slow down slightly, then pick up again a few seconds later. This also happens sometimes when I'm driving it a bit harder.
Yesterday I'd pulled out of a junction and was at about 1500 rpm in 1st. I put my foot to the floor and it accelerated, but not very hard. When it hit about 4000 rpm it was almost like someone had flicked a switch and it suddenly picked up.
I fitted a boost gauge to see what's going on, and the boost seems relatively consistent. In 2nd, 3rd and 4th it boosts to 16-18 psi ish (1.1 - 1.2 bar). In 1st, 5th and 6th I've usually got more important things to look at than the gauge.
I've cleaned the MAF (thanks to Vonbeck for the MAF BAF idea) and that seemed to make little or no difference. I don't think the previous owner did the Mark H mod, so that's next on the list.
I know the usual things that go wrong are the WGFV, the DV and the IC O ring, but would these have an effect when it's off boost?
Where should I start looking?
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