PistonHeads.com Forum

signum 2.8 turbo



Original Poster:

1 posts

39 months

Friday 21st September 2012
quotequote all
Hi All

signum not starting properly in the morning ,does not tick over good and goes to stall
also getting juddering at high boost
i think it is fuel related ,but dont know where to start

got codes

P0090 fuel pressure regulator control circuit
P0170 fuel trim malfunction

any body got any ideas


25,056 posts

99 months

Thursday 27th September 2012
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It's telling you that there's a fuel pressure problem. Given that it's at idle too it's unlikely to be a starvation issue (pump, blockage) as if there wasn't enough fuel to idle it would likely not drive at all. So my money is on the fuel pressure regulator or the electronics that control the fuel pressure regulator.