No boost and not revving.

hey guys, hopefully someone can help me with this i am stumped.
 
went out to drive my 91 gen 2 the other day, hadnt driven it for a few days and now i have no boost and the car struggles to rev past 4k rpm and feels like its doing it really tough.
boost gauge wont even get up to 0 stays in the negative all the time.
 
any thoughts??
 
checked all the pipework seems fine, i installed a fujitsubo cat back exhaust last week but drove fine with that until i parked it.

You should at least be getting close to zero manifold pressure with a fully open throttle. Seems you must have a restriction in your intake. Take the pipe going into the turbo and see if the compressor spins freely. Or I guess you could have a massive restriction in your exhaust.

Does it rev freely with no load?

Cheers

>.< sorry should of said, has a vipec ecu installed no AFM anymore, MAP all the way :)
 
it revs a little better in neutral with no load but still not normal, ill pull the exhaust off and see if i can see anything.
it feels really restricted but dont know what would do that with it just sitting for 3-4 days, rats living in my exhaust???? lol.

Check the linrmes to the map sensor etc. Prolly a split on one of the ends. Happened a few times to me.

ok bit of an update, checked all the intake piping and IC all seem fine, pulled the factory dump and cat off yesterday and replaced with a Berk one, thanks to Dylan for that :)
 
car still runs like ****. did a ecu reset and fixed a dodgy fuse, same problem.
 
getting no boost and car is really struggling to rev past 4500 rpm, it idles and revs clean, not jerky or lumpy, what could of gone wrong with it sitting for 3 days without driving it??
 
1 thing after another with this car >.<

i did yeh when the pipes were off, seems fine not much play and wastegate isnt stuck.
 
i figure it is something electronic or a sensor because even if wastegate was stuck open and i had no boost that shouldnt stop the engine from revving like normal correct??
 
but have no idea where to start looking lol

Correct, you would just get a lower boost. but if the turbo shaft itself is stuck it would create a massive restriction in your intake (and exhaust).  You should check it, but strange it would **** it self all of a sudden.
 
When you drive it does it not rev beyond 4500 rpm at all, or is it just slow?
 
You could disconnect the intake pipe from the throttle body and see if that makes any difference to the way it drives, bypassing the turbo.  If not refit and take exhaust off and see if that does anything.  Maybe something disloged and has blocked the muffler? If both make no difference you know it fuel/ignition/electronics, nothing else it could be really.
 
You havent got water in the spark plug holes or anything like that?  What do the plug look like?
 
Strange that the issue appeared after you changed the exhaust.  Just methodically go through each bit step by step.
 
Cheers

Ive got a similiar problem friday night i was driveing up n down giveing it no problems last night it started getting heavy while driveing on the freeway wouldnt let me rev after 3500rmp n if i pushed itll miss, ended up stoping at a carwash checked all my lines were fine hoses fine checked the dizzy was a little loose but not loose enough to turn i gave up cuz it was getting late jumped in the car and drove fine?¿ untill now no issues i have checked almost everyrhing now gotta do dizzy which i put on hold gotta pay for hope that fixs it, try the dizzy check timeing if that doesnt work then .... cuz i have been scratching my head for weeks now n cant find the problem lol