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6.5L Turbo Diesel Hummer H1 1999 - Erratic RPM and throttle problems
The engine runs okay at idle (600 RPM). At high idle the vehicle sounds like it is missing and the engine shakes and rpm sways from 1200 to 1500. The vehicle is not drive-able. The throttle is very touchy and can jump rpms from 1800 to 2500 and race. It seems to be able to manage max rpms so...- slowbutsteady
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- Replies: 16
- Forum: GM 6.5 Diesel