Posted: Mon Feb 18, 2008 12:24 am
Have you checked your cats for clogs?
I have a very similar issue with my 91 turbo. Mine runs better when it's hot though. Same funky boost readings and it actually pulles harder at 3/5 throttle than it does WOT. Sometimes the thing is mean and sometimes not. Like a lurching. The lurching does not seem to be related to boost pressure.
I've replaced:
fuel filter, air filter, pcv, plugs.
it runs the same with the O2 disconnected and the same when the knock sensor is unplugged.
I'm replacing the cats and fuel pump next!
good luck!
I have a very similar issue with my 91 turbo. Mine runs better when it's hot though. Same funky boost readings and it actually pulles harder at 3/5 throttle than it does WOT. Sometimes the thing is mean and sometimes not. Like a lurching. The lurching does not seem to be related to boost pressure.
I've replaced:
fuel filter, air filter, pcv, plugs.
it runs the same with the O2 disconnected and the same when the knock sensor is unplugged.
I'm replacing the cats and fuel pump next!
good luck!