Annoying litle problem, help needed!

[psiconauta911]

Hi all,

Hope you can help me with this one!

For some time now my S2 Avant has an itermitent little problem and it´s very annoying.

It starts ok first thing in the morning when I take the kids to school, near there (8/10miles) it begins to acelerate slightly when coasting (3/4 Lts/100 on the BC), when I start it again sometimes the idle goes instantly to 1700/1800 rpm and stays there, I have to turn it off and unplug and plug the MAF connector once or twice (or move it a bit) and then it starts ok (idles ok again), sometimes it cuts when on full boost! the coasting problem shows up after I go over some piece of road full of scars but for the rest of the day it works fine and when I go pick up the kids I use the same road and nothing happens!!

What I have done so far:

Clean the MAF conector realy well with contact spray and very fine sand paper, I also open it up and everything seems ok, no damaged wires.
Changed the MAF with another I have, nothing changed. Both MAFs are clean and no broken contacts, to exclude something broken inside the MAF.
Did the Mark H. mod., thank you Mark!
Did a leak test, no leaks!
Changed the ISV and everything the same, so cleaned my old one and put it back.
Changed the N75 for a new one although the old one is working.
Pulled the codes, No codes!
Did a compression test the worst cil. 11,5 the best 12,3, so no problems there.
The car is on LPG but the problem happens on both fuel, I´ve tried it already.

The Avant has 182000Km fsh and homefries the rest is stock.

I´m going nuts with this one!!!
It seems electrical but dosen´t happen everytime I go over bad paved roads only in the morning after geting up to temperature, it goes away after upluging and pluging the MAF conector once or twice but everything looks ok MAF related! No fault codes! No leaks! No CLUES!!!

Help please!

[UrS4boy]

Try checking and cleaning the Throttle Position sensor connector.

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

[psiconauta911]

Try checking and cleaning the Throttle Position sensor connector.

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

Thank you,

I´ll try cleaning it!

[psiconauta911]

Well first results are promising, clean the TPS and some others around and after that tried a 4th gear full throtlle without cuts, let´s see tomorrow when I take the kids if the other problrm is solved.........fingers crossed!

[UrS4boy]

Well first results are promising, clean the TPS and some others around and after that tried a 4th gear full throtlle without cuts, let´s see tomorrow when I take the kids if the other problrm is solved.........fingers crossed!

Well if I was correct, I'll take payment in a bottle of port.

(I joke)

[psiconauta911]

Today it worked perfectly let´s test it some more and confirm the cure, if so it will be my pleasure to send you a bottle of Porto wine though I don´t know about sending liquids by mail if it´s doable!