08-15-2021, 04:52 PM | #1 |
Enlisted Member
15
Rep 48
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Flashing back to stock running high-flow DP
I’ve had stage 2 BM3 with a CTS high-flow DP, combined with xHP Stage 3 Trans tune — loving it.
Went in for my NH state inspection, didn’t think to flash back to stock and got OBD not ready — failed. The shop said flash back to stock for 100 miles and retest. I can keep the DP on without worry using stock flash, right? Anything else I need to do in preparation to pass emissions test? Thanks!! Last edited by seanroberts000; 08-15-2021 at 05:06 PM.. |
08-18-2021, 07:56 AM | #2 |
Lieutenant
291
Rep 547
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Yes, you can keep the DP on without worry using stock flash. Not familiar with NH emission policy though. In Cali, we would have to swap DP back to stock.
Also not familiar with CTS high-flow DP, would it throw a CEL with stock tunes? If it does, I would think it wouldnt pass. If it doesn't, then it would depends on NH emission policy and whether it allow aftermarket catted downpipe. |
Appreciate
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