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Cold start issue


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I just got my car pro tuned and on cold starts I'm having issues 4/5 times. It's not major but after all I've been through, it makes me paranoid. It will go low on rpms and shudder, then shoot up to 2k rpms and go back down - shudder and repeat. I've had a tune that did this before where I got a great street tuner to fix it but now I got a pro tune and it's doing it all over again. Is it a/f ratios? Is it a simple fix by my tuner? I'm waiting on him to contact me back but it's been a hard time getting ahold of him at the moment which is why I'm asking on here. Give me some thoughts, thanks
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