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Ok, might have found the problem... Changed the injectors. Had a great deal on ebay when the seller excepted a ridicules bid by mistake. Left me with 4 injectors that were 6months (build date) old and couldn't have done to many miles.
Now after replacing the fuel trims were better but still high. Did notice the fuel pressure dropped to about 40 bar, building up to 47 bar and then dropping again. This was not happening with the old injectors. They were very dirty and some holes were blocked by carbon buildup. So i replaced the hpfp with another one that i thoughed was faulty. It's not perfect but pressure is at 50 bar again and build it's pressure up a bit faster to. Only two things wrong with it. It's unable to keep a steady pressure compared to the old one. For example doing 120 on the motorway makes the pump vary between 90 and 95 bar instead of beeing at 93 bar like the old one and there are peak pressures up to 160 bar very shortly but when i floor it it does peak.
But the fuel trims are below 10 again. Went up to 10.5 but got back to 7 when i got home. So lets hope the problem is now sorted! We'll see and i'm keeping my fingers crossed.
Thanks all
Now after replacing the fuel trims were better but still high. Did notice the fuel pressure dropped to about 40 bar, building up to 47 bar and then dropping again. This was not happening with the old injectors. They were very dirty and some holes were blocked by carbon buildup. So i replaced the hpfp with another one that i thoughed was faulty. It's not perfect but pressure is at 50 bar again and build it's pressure up a bit faster to. Only two things wrong with it. It's unable to keep a steady pressure compared to the old one. For example doing 120 on the motorway makes the pump vary between 90 and 95 bar instead of beeing at 93 bar like the old one and there are peak pressures up to 160 bar very shortly but when i floor it it does peak.
But the fuel trims are below 10 again. Went up to 10.5 but got back to 7 when i got home. So lets hope the problem is now sorted! We'll see and i'm keeping my fingers crossed.
Thanks all
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