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Thread: Boost surge

  
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    sammyh's Avatar
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    Boost surge

    Evening

    Bought the wife a Zafira Gsi a few weeks back and i'e noticed that under acceleration ther boost seems to be cutting in and out, its not violent but i'm sure its not right

    Any ideas?

    thanks

    Sam

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    gsi-jay's Avatar
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    wot gears does it do it in as 1st and 2nd it will overboost and then cut right down this is done to save engine and box if all gears its more than likely a boost solenoid altho saying cheep petrol can cause similar problem
    courtney stage 3 zafira,Mitsubishi evo geek mapped to 389 and 470 lb of torque

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    Thanks for the reply, its noticable in 5th on the motorway and we only use v-power

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    can you get hold of a bost gauge if so that will tell you if its just the overboost you can feel and it then dropping down to a pressure it can hold should be around 8 to 9 psi if standard map i know the early ones had a boost solenoid prob which was updated to a vxr 1 so if it around a 03 or earlier that could be ya problem
    courtney stage 3 zafira,Mitsubishi evo geek mapped to 389 and 470 lb of torque

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    Its a 53 plate first reg in jan 04, you're the second person to mention the solenoid, where is it located?

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    Yes, it does sound like the boost control solenoid, except there are 2.
    1 is at the back of the engine near the throttle body, I think.The other is at the front of the engine bay, a little black box on top of the turbo with a small black pipe coming from it IIRC.
    I could be wrong but I'm sure they are identical parts with the same part number.

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