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    Vauxhall Vectra B, 2001, Simtec 7.1. 1800 Archived Message

    Posted by Andrew Walch on June 3, 2008, 4:38 pm

    Hi all,

    Got a bit of a problem and wondered if anybody could give a few pointers.

    When driving, especially under load, the car intermittently losses power but regains it as quickly as lossing it. With the scan tool connected, the throttle body valve appears to drop to idle from part to WOT. The APP readings seem ok with no fluctuations even during the fault condition. Calculated throttle position drops to 0% and returns to where ever the throttle position was last.

    I can induce the fault by holding the brake and accelerate WOT. Other than this simulation condition, the fault is very random.

    A customer of ours had a similiar fault sometime ago and changed the fuel pump, fuel pump relays, throttle body, fuel pressure regulator. These components were changed on advice.

    Any help would be appreciated.

    Andrew

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