For the past few days, I hear a rattling noise in my engine for about the 1st 15-20 minutes, then it goes away. While the rattling occurs, acceleration is much slower, and I even feel a little hesitation while trying to accelerate. When the rattling stops, I'm able to accelerate as usual. FYI - I had a gasket replaced and an oil change last week. Anyone that can help, thank you in advance!
engine rattles/slow acceleration on 2000 Chevrolet Camaro
The early morning rattling is more than likely cause by a weak lifter. Once the oil pressure gets up and the lifter gets "Re-primed" the play or slack goes away and the push rod stops tapping.
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Sounds like a possible misfire, but hard to say without seeing it first hand. My recommendation is to take it back to the shop that did the work as this may be related.