Quote:
Originally Posted by TrueWhiteBoy
Stage 2 with a stock DP - 1 gutted cat and 1 good one
Been running that setup for a couple years.
Failed recently. Passed everything but the startup
Likely cause is that over time the 2nd cat started breaking up.
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on startup???
the smog tech should have left your car running before he did the test......gotta keep the cats warm or they arent as effective at cleaning up the exhaust.