2.0 hdi expert - no power low down

johntom · Post by **johntom** » 11 Apr 2011, 22:38

Hi
my 2002 hdi has hardly any power when setting off, however it seems to pick up when the revs build ie on turbo, and drives ok when moving?

I read the fault codes and got:
po243 turbo/sup wastegate solenoid A malfunction and
po230 fuel pump primary circuit malfunction

Also when starting from cold it stumbles into life on usually the second or third attempt, however it starts perfectly fine after that? I initially thought glow plugs but after reading the codes I am wondering if it's the intank fuel pump?
how do I test/find out about the codes?
many thanks

dieselnutjob · Post by **dieselnutjob** » 15 Apr 2011, 16:46

you need a diagnostic tool that gives you live data for rail pressure and see it you are getting sensible rail pressure.
From memory you might be able to see pressure requested as well as actual pressure. A big discrepency suggests that the ECU is not getting the rail pressure it want.
The same applies to boost pressure.