R34 Possible Boost Problem, Help!

[CK34GT]

Hi All

I have been driving my 98 R34 GTT for about 3 months. I bought it stock standard and since fitted a 3 inch exhaust from the turbo back. The car was running fine when I bought it in Summer, but recently (over the past month or two) now that the weather is getting colder, I am having a very annoying problem when I put my foot down hard. The car seems to stutter (makes a bad stuttering noise) and lose power, only seems to happen in the cold weather conditions. The car seems to spool fine but when it reaches the maximum boost (running stock boost at the moment) it seems to just die in the arse and not gain any more power, this morning it was really bad as it is pretty chilly out there.

Has any one out there experienced any similar problems on their R34's? I do want to add that the car was having the same problem before fitting the exhaust.

I think it may be a vacuum leak or something?

[CK34GT]

HHHHEEEEELLLLLLLLLPPPPPPPP!!!!!

[Pauly33GTS-t]

If what you are getting is r&r because the full zorst you fitted has unrestricted the airflow and is making your turbo boost slightly harder, ECU says "OMG what has he done!" and starting slitting its wrists then you need to turn your boost DOWN...

Car's will boost a bit higher in the colder months, since the air is denser.

If you have a boost controller, mechanical or electronic, turn the boost down, also, if you believe the car is missfiring and not so much just stopping at 4,500-5,000 rpm or so, then get your spark plugs gapped to 0.8mm as this is probably the issue if you are missfiring. If you have recently just changed spark plugs, then they are most likely pregapped at 1.1mm, this is not close enough and will produce missfiring in colder weather with a full zorst from turbo-back.