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Old 05-16-2017, 06:26 PM
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Default Throttle surge at higher speeds

Good evening everyone. I tried looking for a simular thread but not sure if its the same issue as ones i read.
so here it is in a nutshell. 2003 volvo s80 t6. When driving at a slight or even acceleration the car seems flawless. When i jam down the gas pedal it sort of feels like im feathering the gas off on off on synced like a rollercoaster ride at any speed it lundges continuously until i drive at a constant speed or use a slow/normal acceleration. Im stumped as this is my first car with a turbo. Has anyone come across a situation like this? Any advice would be greatly appreciated. Thanks!
no cel.

Last edited by Bostontrey; 05-16-2017 at 06:29 PM. Reason: Info
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Old 05-18-2017, 12:51 PM
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how many miles on the car and when was it last serviced? turbos do have a certain amount of lag but it should be more of build up and should not lunge. Causes can be varied - weak spark, dirty throttle body/MAF, fuel pressure issues, intake air leaks or soft hoses, intake or exhaust restrictions etc all come to mind. I take it you don't have any check engine light or service messages popping up?
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Old 05-19-2017, 10:47 AM
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the car has 105,xxx
no check engine lights.
plugs seem ok, new air filter too and oil.
its a soft lunge synchronized in its motion and its only when I mash down the pedal.


How it feels::::::: as if I am softly accelerating and de-accelerating off on off on until I resume normal acceleration.


If I don't mash the pedal its as if nothings wrong at all. I hope that helps some.
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