Thread: Schizoid Boost
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JFairman JFairman is offline
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Join Date: Jul 2006
Location: S. Florida
Posts: 7,223
"Stock cat and exhaust are back on the car and at the same time this boost problem has appeared."

Now that you said that it could be the cat is old, used, and somewhat clogged up and making exhaust backpressure after the turbo to the point it is lowering boost spool up.

That probably doesn't explain the boost lowering after one run unless all the heat buildup in the cat is causing crap or something inside it to expand and choking the exhaust flow more and increasing backpressure more that second time you floored it and lowering the boost.

Take the thing off after you pass emissions with it if possible and try again.
Old 08-13-2010, 12:38 PM
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