Have you run a diagnostics code yet?
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Purely from memory so check on-line I think it's pins TE and E1 then count the flashes and yahoo the code.
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Do you have an immobiliser fitted to the car?
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What make and model.
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Might seem strange but on some models they won't work within proximity of police
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/ fire stations if you're out?
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It seems like a fuel issue?