Fuel pressure pump - 2.2Direct

**Rich2.2** · 12th February 2010, 21:00

Hi there, new to the forum

I have a problem with my 56plate 2.2 Direct SRI mis-firing. I have had it diagnosed as 'Cylinder 1 mis-fire, Fuel pressure pump circuit high input'
I cant remember what the actual codes were, but was told it was likely to be either the Fuel pressure regulator, or indeed the Fuel pressure pump.

I looked though this forum and found that this seems to be a common problem with my engine.

I decided to replace the regulator today, before I blew £350+ on the pump... Unfortunately did not cure the problem. My engine light is on and it has been mis-firing most of the time for the last couple of days - however this morning on my 5 min drive to work it behaved itself!!

Has anyone had similar problems to this that might be able to help me?
I am planning on changing the plugs tomorrow (as they need doing anyway) and looking at the coil pack, in the hope that I might find a problem here......

If anyone has any advice it would be much appreciated!
Many thanks.

**rick1965** · 12th February 2010, 22:59

changed all 3 fuel pump,regulatorand fuel rail sensor,thats the three things that run your fuel system so vx told me cured mine hope this helps,rick

**Tadpole** · 13th February 2010, 10:19

Don't forget to change the Fuel Filter also

......................

**Rich2.2** · 13th February 2010, 10:35

Yeah will do, thanks! Gonna change all filters and service it! Is it worth doing that before i buy a new pump? I know its probably inevitable that its faulty, but no harm in trying other areas I suppose!

**Rich2.2** · 13th February 2010, 20:07

Ok, update....

Removed coil pack and it was quite obvious that there was a build up of dirt/damp on numbers 1&2. When i removed the spark plugs, again numbers 1&2 were very black and dirty.

Changed the plugs, and cleaned up the rubbers on the coil pack and its running spot on again

. The EM light has also now gone off.. result!!

It looks as though the engine was pressure washed before I purchased it, and water has collected and ran down to 2 of the plugs, causing a fault with them.

Yesterday I had changed the Fuel pressure regulator but this wasn't the problem - I have therefore got one spare, in full working order if anyone needs one, PM me!

Thanks for your help