boost leak???

Godspeed

88 supra turbo 5spd
May 13, 2005
1,119
0
0
43
Asheville n.c.
ok my 1g runs stock 10psi well i was driving it the other day i noticed when i get on it it would run up to about 9-9.5 and then fall back to like7.5 or so what the hell???? i checked all piping and hose but they are all tight any other things i should check?

i also found a used single setup for my car its a to4e coldside 60 trim and hot side 57 trim the single mani. and all oil lines and an hks external gate. for about $300 dollars i know its worth it but do you think it would be a good size turbo to run on this engine?
 

7MGTEsup

Formerly 'Down but not out'
Jun 14, 2005
614
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0
England
Sounds like your wastegate diaphram might be starting to go south. Or there might be a small crack in one of your hoses that only opens up under boost.