ok

starts with

i get the car back yesterday after bottom end rebuild, and its running mint

i drive it until 2 this morning on a "running in drive" (with thin oil in), and its mint and drives sweet for 350 miles
get in it today and all is mint still

then about 6 tonight im having a little clean in the engine bay and notice a jubilee clip loose...

so, i take the air box out and affiliated hoses and refit to make absolutely sure they re all tight...

now....im absolutely 100% positive all connections and pipes are how they should be


sooooo
the misfire starts AS SOON as it even sees a bit of boost...
and its a massive misfire
if i rev it to 4k without it coming on boost, then its fine
but the second it comes on boost, massive misfire again....
it also seems to be down on oil pressure slightly....
but apparantly the gauges arnt to be trusted
what the fuck is it???????

its a nissan skyline gtr by the way

 

 

has it got the std mangment or some sort of pigy back attached

 

std

after stressing and going arrrrrrrggggghhhh for a few hours, i realise the problem only started after i was messing with pipes...

so im gonna go out and take off and refit to make sure, again, that its piped properly



carl

 

sounds like low fuel presure to me had a pulsar in yesterday same thing as sone as it tried to boost it missed and poped he gauge was showing half tank so toped it up and it sorted it i think your is a fuel problem cheack you vacume pipe to the fuel presure regulator

 

can these people not help. http://www.gtr.co.uk/forum/upload/index.php

 

There are so many things it could be. But after clearing up pipework issues, I would be looking at the condition of the spark plugs/coilpacks and also a possible problem with an Airflow meter.