Teal854T Posted February 12, 2018 Report Share Posted February 12, 2018 2006 V50 t5, 130k miles. Car shakes a lot during cold start for about 30 seconds. Misfired codes from p0301, p0302, p0303, p0304, p0305, p2291. Replaced spark plugs, coils, injectors, fuel pressure sensor all IPD USA. Change oil regularly with Mobile 1, Still shakes. Car runs very good after that 30 second of worm up. Can it be fuel pump? It is driving me nut. Need help! Thanks Link to comment Share on other sites More sharing options...
Ihatespeedbumps Posted February 12, 2018 Report Share Posted February 12, 2018 I'm going to bet the fuel pump check valve is leaking down causing your issue. Hook up a mechanical gauge to the rail and observe fuel pressure, shouldn't drop more than about 20psi in 20 minutes. If it does you'll need a fuel pump. Link to comment Share on other sites More sharing options...
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