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So I recently bought a new Stillen grounding kit for my sedan and changed the alternator. When the car is on park itll do a little baby misfire for about 4 seconds and idle normal. Then after a few monents later the car idles perfectly at 750rpm and then it drops to 500rpm and the motor shakes a little then go it goes back to 750rpm and it does that constantly. Any Ideas?

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I have an Optima Yellow Top, its gel and either way that shouldnt be the problem it’s something else but moving the grounding kit to different ground points didnt help and my i tested the alternator and its perfect. But idk what the problem is

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can you explain that again i dont quite understand. Thank in advance!!!

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From: Houston, Tx

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Oh yeah. I have bags, amp, subs, basically alot of electronics in the car thats why i went with the yellow top

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the optima battery is known to handle way more that

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how would you do that?