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Discussion Starter · #1 ·
My car does this super randomly, but it will startup fine when cold, but once I drive it for awhile and start and turn off the car frequently (like 3+ Times) it will sputter as soon as i start the car when it’s hot, and idle extremely rough until it smooths out. (Takes about 15 seconds). This has happened to my 04 Saab 9-3 as well but I could never figure out the issue. Sometimes it idles so rough is stalls and I will have to start it again. Anyone else had this issue or any idea what the culprit might be? Thanks for any help!!!
 

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Hi and welcome.
Have you checked/replaced spark plugs? What spark plugs you use?
What coils you have?

What fuel you use?
 
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Discussion Starter · #3 ·
Thanks for quick response!! I haven’t done any coil packs or spark plugs yet, and I use 93, and 91 if 93 isn’t available. Is there a specific coil pack I should get for the car? I heard that they need to be upgraded in these cars
 

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Only original, no exceptions.
You should also use only NGK PFR6T-10G or BKR7ESC-11 spark plugs.
 
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