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850R cut out under light throttle

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  • 850R cut out under light throttle

    New issue last week. Car has been running great then out of nowhere, under very light throttle the engine cuts out very briefly and stumbles, if I give it some gas it will catch itself from stalling. Then when I try to go WOT the boost is there but power is definitely not and seems to hesitate after the trans kicks down a gear. To me it seems like I’m loosing fuel pressure possible fuel pump ? No check engine light and every part in the ignition system has maybe 4,000 miles on it also has a new fuel filter What’s everyone’s thoughts ?

  • #2
    You should post this over on swedespeed dot com in the 850 section. You'll get a quicker response.