gberland
Full Access Member
noticed that my 2.2L cobalt while driving down the highway mostly when going down a hill at highway speed almost feels like a misfire ? whole car kicks back just for a quick sec then goes back to normal , now that its colder outside starting to do it more specially when cold outside scanned got dtc P0506 idle control systems RPM lower than expected 220 000km i replaced spark plugs at about 150 000km this car gets driven alot of highways its my work car now ??? anyone experience this issue ?? i was thinking of starting with plugs mabey and cleaning intake throttle body
