All was fine last evening and this morning I put back on my Strut Bar and started the car up. It had a wierd shudder or miss or hesitation at about 2k rpm's. It feels like a vacuum leak or a spark being blown out. I also threw a CEL. It will build boost but it doesn't act like it want so hold it. I have NGK TR6's with .035 gap. I looked for about a half an hour for the leak, to no avail. I am going to Street Flight tomorrow to use the OBD2 scanner. I am planning to get a new/upgraded Blow-Off (Bypass) valve tomorrow. I have three suspicions... Let me know what you all think.
1. Vacuum Leak due to boost pressure popping seal.
2. Spark being blown out or fouled plug.
3. Bypass valve is failing (cheap-ass Bosch that is in the kit) due to boost pressure.
Important to note- this stumble happens in all RPM ranges and not nessecarily only in the boost range.
