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Intermittant electrical problems when starting the engine.

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29 July 2013
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So I have the key turned to ACC & everything electrics wise is fine, I start the car & all the radio/boost controller screen etc goes off while it starts & then the radio etc comes back on.

But sometimes the little boost controller screen just says ERROR & beeps continuously or occasionally it wont come on at all, If I restart the engine its ok, this happens more frequently in the winter when its cold.

Less often I get the a-pillar boost gauge not working, the needle goes to the max & back down to minimum & wont move, restart the engine & its ok.

Even less often (its only happened twice so far) the boost screen is ok, the boost gauge works but the boost is totally uncontrolled & boosts like crazy with hardly any accelerator, turn off the engine & back on & its ok.

Any ideas what it is that could be causing it, its so intermittent I don't think I can test anything. Ignition switch!?!
 
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