Hi, I am relatively new to this forum, (couple of months), but well addicted already, this is my first "help required please" post, and while I may or may not be able to find the answer if I look long enough at the masses of threads, (divorce is not an option), I would be appreciative if people could suggest what might be wrong with my standard '95 ABY Avant.
It idles roughly, like a V6 with a suspect cylinder, and bogs down on prompt take off if not rev'ed to 4/5K, for say crossing a busy junction, turning right.
It has a new lamda probe, N75 valve, Baily recirculating valve, cleaned throttle body, partially cleaned MAF (needs to be done again overnight with more alcohol), new engine speed sensor, new Idle Stablisation Valve, (this made a very positive difference when fitted - less "hunting" when radiator fan cuts in in traffic, worth the money IMHO).
Two new knock sensors are on back order. I also have to check the vacumm hoses yet?
It revs to 7,000 rpm and boosts well after 3,500 rpm, but will not wake up at 2,000 rpm like I feel it should do from reading all of the old magazine artilces dated 1994/1995, when they compared S2's to S2 Nothelle, RS2 and the MTM S2 with 428bhp.
An 034 Manifold and downpipe is ordered, together with a Garrett T-2871R and RS2 like injectors, a custom chip, it will also have a 3" system fitted to it with no cats shortly, but in the meantime I'd still like people's advices on what the cause of the "boost hole" is between 2,000 rpm and 3,500 rpm as it is driven everyday and would naturally be nicer to drive if this problem was cured now and before the new parts are fitted.
The specialist from who the parts are ordered from has been extremely helpful to date and made a number of suggestions of things to check, which I am working my way through, but I was wondering if I might be lucky enough to find someone who has had and cured this problem in the past?
Sorry to be so long winded, but I thought I give the full pictue in the first post!
Thank you in advance for your interest.
It idles roughly, like a V6 with a suspect cylinder, and bogs down on prompt take off if not rev'ed to 4/5K, for say crossing a busy junction, turning right.
It has a new lamda probe, N75 valve, Baily recirculating valve, cleaned throttle body, partially cleaned MAF (needs to be done again overnight with more alcohol), new engine speed sensor, new Idle Stablisation Valve, (this made a very positive difference when fitted - less "hunting" when radiator fan cuts in in traffic, worth the money IMHO).
Two new knock sensors are on back order. I also have to check the vacumm hoses yet?
It revs to 7,000 rpm and boosts well after 3,500 rpm, but will not wake up at 2,000 rpm like I feel it should do from reading all of the old magazine artilces dated 1994/1995, when they compared S2's to S2 Nothelle, RS2 and the MTM S2 with 428bhp.
An 034 Manifold and downpipe is ordered, together with a Garrett T-2871R and RS2 like injectors, a custom chip, it will also have a 3" system fitted to it with no cats shortly, but in the meantime I'd still like people's advices on what the cause of the "boost hole" is between 2,000 rpm and 3,500 rpm as it is driven everyday and would naturally be nicer to drive if this problem was cured now and before the new parts are fitted.
The specialist from who the parts are ordered from has been extremely helpful to date and made a number of suggestions of things to check, which I am working my way through, but I was wondering if I might be lucky enough to find someone who has had and cured this problem in the past?
Sorry to be so long winded, but I thought I give the full pictue in the first post!
Thank you in advance for your interest.
Unfortunately we didn’t have any luck finding the problem so hopefully some of you guys can give a few suggestions.
I have a couple of those sensors spare if you want to change it out and see what effect it has. Label file also lists groups 1,2,3 which covers Throttle Angle, Intake Air Tempthrottle, Idle switch, and Temps in more detail so we can check them too. Sorry for cancelling saturday, still trying to shake off this cold 
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