Wastegate issues...i think

Spy_91 · 07-01-2014, 08:07 PM

Apologies for bringing back an old thread. But I resolved the problem and if anyone else has the problems listed above, hopefully this helps.

As i posted previously, my boost was cutting out at wot and I got error code 34. I replaced my stock BOV, with the Bosch and after checking every intake hose and cupler, I found no holes, cracks, or loose fittings. Since that did not fix my problem. So I went to the next suggestion, which was the wastegate actuator. After inspecting the actuator (opening up the canister) I found a small hole/crack in the rubber diaphragm. I bought a new "CT26 Wastegate Actuator" from driftmotion (which was a direct fit) and installed it. Went with the 11 psi since it was the same price as the 8 psi. Anyway....Problem solved!! No longer cuts out at wot and is able to boost to well over 5 psi (which is were it usually cut out) no more error codes, and woot/hoot sound went away.

cre - thanks for all your input. You'll be happy to know that i ditched that sponge filter and i'm currently running apexi's cone intake filter.

1989stupra_targaturbo · 08-13-2014, 06:01 PM

I've been having the very same problem... but have yet to check the actuator... hopefully all this info will come in handy. Ive had nothing but trouble with the turbo on this car since I bought it. Some days it would run fine, but most days its awful... most recently my ebc stopped working... when I flip the switch on it does nothing. My factory boost gauge is still hooked up and working, does this make any sense?
this is my second 89 with the 7m gte ...im starting to regret it!

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07-01-2014, 08:07 PM	#1
Spy_91 Stock Join Date: Feb 2012 Location: Kansas Posts: 8	Apologies for bringing back an old thread. But I resolved the problem and if anyone else has the problems listed above, hopefully this helps. As i posted previously, my boost was cutting out at wot and I got error code 34. I replaced my stock BOV, with the Bosch and after checking every intake hose and cupler, I found no holes, cracks, or loose fittings. Since that did not fix my problem. So I went to the next suggestion, which was the wastegate actuator. After inspecting the actuator (opening up the canister) I found a small hole/crack in the rubber diaphragm. I bought a new "CT26 Wastegate Actuator" from driftmotion (which was a direct fit) and installed it. Went with the 11 psi since it was the same price as the 8 psi. Anyway....Problem solved!! No longer cuts out at wot and is able to boost to well over 5 psi (which is were it usually cut out) no more error codes, and woot/hoot sound went away. cre - thanks for all your input. You'll be happy to know that i ditched that sponge filter and i'm currently running apexi's cone intake filter.

08-13-2014, 06:01 PM	#2
1989stupra_targaturbo Stock Join Date: Jun 2014 Location: ontario canada Posts: 15	I've been having the very same problem... but have yet to check the actuator... hopefully all this info will come in handy. Ive had nothing but trouble with the turbo on this car since I bought it. Some days it would run fine, but most days its awful... most recently my ebc stopped working... when I flip the switch on it does nothing. My factory boost gauge is still hooked up and working, does this make any sense? this is my second 89 with the 7m gte ...im starting to regret it!