S6 timing

[HMS-S6]

Patience Dave. It easy to type suggestions, it is harder to keep checking them out, especially when progress is difficult.

That it is, specially in the dark with a frost currently forming! Lol
It's frustrating for me too as by rights the suggestions you guys are making would make PERFECT sense but I've been there with most of it.

[UrS4boy]

It's frustrating for me too as by rights the suggestions you guys are making would make PERFECT sense but I've been there with most of it.

I've got it.

The perfect solution. End everyone's misery.

[newsh]

That's not funny Dave

[HMS-S6]

No, I wasn't going to bother responding.

[UrS6 - IamS6]

Can't remember if you're on Bosch spark plugs, but if so consider changing to NGK.

[UrS4boy]

Can't remember if you're on Bosch spark plugs, but if so consider changing to NGK.

But then you get this, from a different thread:

Well,i tested the coils,swamping the spots and it was all fine. But i also swap the spark plugs,and problem was found! They are NGK's and less then a year old and i didnt do on them 400km.I would say cheap problem

Point being, the plugs should at least be checked for a) tightness (30 Nm) and b) damage/fouling. Running rich at low RPM could foul them - which then might produce poor performance at WOT in mid-RPMS, until the fouling is burned off and then, at a higher RPM range, they clean themselves up and run okay until the next cycle of low rpm rich fouling, etc. Check after some low RPM (no WOT) runs around town.

[HMS-S6]

Hi, if I get time in the garage today I'll take them out and have a look at them.
I got to use the car quite a bit yesterday and if I got it not pulling, if I closed the throttle for a second or two then opened it back up it pulled well every time! As it going on the over run for a short time made it ok! That or changing gear!

[macspring]

Hi, if I get time in the garage today I'll take them out and have a look at them.
I got to use the car quite a bit yesterday and if I got it not pulling, if I closed the throttle for a second or two then opened it back up it pulled well every time! As it going on the over run for a short time made it ok! That or changing gear!

Somebody should have an idea of the cause from this description ?

[newsh]

Weird.. Could be a plug breaking down.

[twoqu]

Ok I'll say it!
Have you checked you are actually getting full throttle reliably!
I guess most of the regular contributors have bottled out of mentioning the TPS but first use the measuring block in Vagcom to verify that at WOT its over 90. Do this with the car stationary and ign on. If it less you will need to adjust the throttle cable to get it.
Unlesss of course this is a mechanical issue with the throttle body that is hanging up somehow when its at the beginning of its travel yet when going from one stop to the other its ok. Wouldn't hurt to physically examine the TB to verify that you can manually open it to full throttle.
Before you ask the TPS is, according to the experts, only used for boost control.
This does as a previous member pointed out fit in with our its on the car theory rather than a sensor. I have never seen one taken apart but it must eventually wear. Must be some sort of bushing/seals involved somewhere.

[newsh]

I've been thinking that when it loses power it's because you're losing one cylinder, because the ECU is still giving good boost but the power is less.

[UrS4boy]

G69 / F60 Throttle valve position potentiometer /idle switch information

I have never seen one taken apart but it must eventually wear. Must be some sort of bushing/seals involved somewhere.

G69 / F60 Throttle valve position potentiometer /idle switch information:

http://forums.quattroworld.com/s4s6/msgs/20405.phtml

I need a cut-away of a real TPS, not just this:

[twoqu]

I mean the actual mechanical gubbins of the throttle body!

[UrS4boy]

I mean the actual mechanical gubbins of the throttle body!

Okay. But I have never heard of this as being an issue in 16 years of UrS ownership.

Easily tested for play after the inlet hose is removed.

[HMS-S6]

Hi. I have checked multiple times the throttle switch function and was replaced regardless to rule it out further to no avail.
I have popped a new set of NGK plugs in today and still no better
Tomorrow I'm going to check the fuel FLOW as so far all I've checked is the pressure foolishly! Is it possible when I change gear the flow is catching back up on itself????