scarface8087
11-08-2004, 02:28 PM
well my first mistake was letting my wife use my 87 turbo t to commute
to work! one day i got in it & went for a quick spin,after my wife has been
driving it for a couple weeks ,i found boost would only get up to approx 3-4
psi ;engine seems to be running fine ,just a total loss of boost power.
powertrain is stock;no dtc's set;all vaccum lines appear to be connected
& free of damage(besides looking a little aged);i am a gm/truck mechanic,
i dont have too much exp w/ these vehicles or their turbo operation;
i haven't gotten to far on diagnosing the problem ,due to lack of resources.
does anybody hav any ideas on where to go w/ this?turbo & wastegate
operation on these vehicles?testing?etc... i tried opening the wastgate
while eng in park,2500-3000 rpm, i could not hear turbo spooling & found 0 boost on guage??? also where can i find a good book on testing these vehicles
..alldata & mitchell have no info on these turbo systems..another thing i thought was wierd, i when i first bought this vehicle about a year ago ,i found the vaccum line to the wastegate sol disconnected,however boost seemed ok w/ or witout this line connected.this was long before the problem i have now, however i thought it was strange.......does anyone know exh back
pressure spec,& where the best place is to take the reading?could a small
crack on one of the intercooler hoses near the clamp ,cause a problem this big?
...very frustrated & lost please help... :banghead:
to work! one day i got in it & went for a quick spin,after my wife has been
driving it for a couple weeks ,i found boost would only get up to approx 3-4
psi ;engine seems to be running fine ,just a total loss of boost power.
powertrain is stock;no dtc's set;all vaccum lines appear to be connected
& free of damage(besides looking a little aged);i am a gm/truck mechanic,
i dont have too much exp w/ these vehicles or their turbo operation;
i haven't gotten to far on diagnosing the problem ,due to lack of resources.
does anybody hav any ideas on where to go w/ this?turbo & wastegate
operation on these vehicles?testing?etc... i tried opening the wastgate
while eng in park,2500-3000 rpm, i could not hear turbo spooling & found 0 boost on guage??? also where can i find a good book on testing these vehicles
..alldata & mitchell have no info on these turbo systems..another thing i thought was wierd, i when i first bought this vehicle about a year ago ,i found the vaccum line to the wastegate sol disconnected,however boost seemed ok w/ or witout this line connected.this was long before the problem i have now, however i thought it was strange.......does anyone know exh back
pressure spec,& where the best place is to take the reading?could a small
crack on one of the intercooler hoses near the clamp ,cause a problem this big?
...very frustrated & lost please help... :banghead: