Martin sp Posted February 23, 2023 Report Share Posted February 23, 2023 First, i am from Denmark so perhaps some words come out wrong. I have some problems with my volvo 2.4t from 2000. Idle is rolling from 750 to 850. Voltage in idle is jumping up and down even with the alternator disconnectet. The sparkplug timing is jumping up and down from 30btdc to 0 btdc. The problem only occures and gets worse as the engine heats up.. Perfect idle and so on when its cold. Any ideas? Camshaft and crank sensor is new, 02 sensors working. Maf and map sensor new. Throttle is working as it should. Thanks Link to comment Share on other sites More sharing options...
bmdubya1198 Posted March 26, 2023 Report Share Posted March 26, 2023 Have you checked for vacuum leaks? That would be a good place to start. I would recommend a smoke test. Do you have any warning lights or error codes? Link to comment Share on other sites More sharing options...
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