Percolation? Heat soak? Don't drive during summer??

j par said

While I like msd and have it myself I always have a hard time recommending a $450+ investment like that for a fix...

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But, DD's symptoms are the same as what my car had. And I had already totally eliminated any chance it could be fuel-related. And the car has run great, never skipped a beat, for at least 5 summers now.