Inconsistent Misfires Cyl 4 and 6
I'm having trouble with random misfires in cylinders 4 and 6. Typically they occur either right after startup or on the freeway (which would be 2200-2700 rpm). No error codes besides the misfires. It had a problem with misfires right after startup for awhile, finally it wouldn't start at all one day, which turned out to be the CPS. After replacing the CPS I had no problems at all for about 6 weeks. Now it randomly (can't seem to connect it to temperature outside, time since last run or anything else) idles rough after start and will misfire in 4 and/or 6 on the freeway. Not experiencing any noticeable power loss on the freeway so I have to think they're not missing many ignitions in a row.
So my question is: Knowing that my plugs, ignition rail and CPS are all new in the last 6 months, what are my target parts to test and how do I test them?
I'm on a shoestring budget but I have time, so even pain in the *** testing is better than "replace parts and pray" so I really appreciate whatever input y'all have. Thanks in advance!
Lifted, Locked, Stiffened
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