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Boost leak at external wastegate

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90AWDTalon

20+ Year Contributor
877
3
Jan 5, 2003
Everett, Washington
I went to the 1/8 mile drags friday night. The car didn't feel quite right, and I also had to turn my boost controller up to maintane my normal boost. I lost all my logs do to the battery in my palm going dead so I didn't have any data to look at so saturday morning I went logged a 3rd gear pull and compared it to an old one. In addition to having to turn my boost controller up to maintane the normal boost I was also spooling 700 rpms later than normal, 30psi @ 4500 should be 30psi @ 3800.

Today I did a boost leak test. I found two leaks. One at the throttle body shaft, anyone know a napa or schucks part number for the '90 style o-rings?

The second leak was at my turbosmart ultra gate were the valve enters the lower diaphram housing, see red circle in attatched pic. Anyone know if this if fixable or is my wastegate dead after four months and couple of thousand miles?
 

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I called the vendor I bought the wastegate from. They forwarded me onto jrponline, one of turbosmarts master distributers. They forwarded me onto, JRP inc., in Canada. They asked if it was the new or old style, I didn't know. They asked if it had a nut on top or if it was flat on top. I said it was flat, they said, "thats not supposed to happen." They then said he would call the guy at jrponline and instruct him on what to do for replacement. So it sounds like it will get replaced under warrenty, on my way out to send it to them.

Also I found the seals for the '90 throttle body at schucks;
O-TITE part numbers:
64012 for the big one
64011 for the small one
There was a huge amount of slop in the throttle shaft and virtually no seals left. Now its nice and tight, zero slop, cant wait to get the wastegate back and see how it does.
 
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