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Discussion Starter · #1 ·
When I'm driving at low rpm it has slight hesitation/sputters when accelerating, like it wants to stall. At higher rpm and when I'm in park it doesnt have the issue...help!

2008 hyundai Tiburon
4cyl 2.0
automatic trans
 

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2006 Hyundai Tiburon SE
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Any recent work done to the vehicle before this started happening? Replaced any sensors lately? If so what brand name and sensors were replaced? Can you record a video to share on YT of the issue?
 

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Discussion Starter · #4 ·
Any recent work done to the vehicle before this started happening? Replaced any sensors lately? If so what brand name and sensors were replaced? Can you record a video to share on YT of the issue?
Took it to a dealer recently, for a brake lamp switch. One of the spark plugs was loose and there was oil in the 1st plug. I retightened everything, but then this problem started.
 

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2006 Hyundai Tiburon SE
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If you have oil in the spark plug tube it could be fouling the sparkplug wire and insulating it from the spark plug. That is a problem with a leaky valvecover seal typically. Replace your valvecover gasket and spark plug tube seals and clean the hell out of your spark plug wires and spark plugs. Might be a good time to replace both. Make sure to use only NGK or Denso brand Copper, Platinum or Iridium plugs. Even a reputable brand like Bosch will give our ECU a hard time and lose power. Stay away from Autolite and Champion! Iridium is the OEM material from the factory, but Platinum is a good 2nd choice for less money than the Iridium. If you are looking for a cheap replacement that won't last as long as the other two materials, Copper will also be OK.
 

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Apologies, I cleaned up some of your posts, not changed intent, but "more betterer".

So, no load it's fine, high load/RPM it's worse.
Best guess from here, plugs and wires. Sorta cheap if you buy and do, report back.
 

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Awaiting a followup, what was checked, how are things?
 
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