Quote:
Originally Posted by xlr8or
Is this a new condition? Was it ok before? Perhaps your plug gaps are too big. Are you in boost at that speed? Where is your timing at in that RPM range? Boost needs to have a little less advance and less plug gap so you don't blow out the spark or cause detonation.
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The condition is relatively new. I think its been there for awhile but it is becoming worse. I noticed the popping from the exhaust while cruising about 500 miles ago but attributed it to the ems. I get popping when decelerating and I've been told that the older fast systems don't do a very good job of fuel management under deceleration.
I am only running 7 lbs of boost for street driving and the boost isn't really coming in until around 3500 rpm. My timing is about 32 degrees. Plug gap is 30. I'm also using c116 now usually c110 so I'm not worried about bad gas or detonation from low octane.