Help F60 bogs down at WOT

[Greenman]

Hi
I have a 2006 f60 that starts and idles fine but after running a short distance at WOT it starts to miss and lose power. If i put the shift lever back to neutral it will drop back and and idle ok then start to idle high.
I have had a diagnostics report done which came up with fault code 37 intake air passage, would this have anything to do with it and if so how do i fix the code.
Before this happened I had the VST off and cleaned and the injectors cleaned and tested all came back ok.

[Greenman]

Also can somebody tell me how to test the pressure of the VST tank.
There is a valve on the top, can I put a pressure gauge on this or do I need a special fuel pressure gauge?
Tested it today with a air pressure gauge and couldn't get a reading (gauge never moved).
Thanks.

[madharchod]

i reckon you have your injectors cleaned before you go and do anything else as these models have a tendency of failing injectors

[Greenman]

I bought this motor and had it serviced including having the injector cleaned and tested before i put it on my boat. First trip out it played up like I explained above. I guess I can't rule them out but if its not very hard to test fuel pressure I would like to do that before I spend more money to have the injectors cleaned again.
I have cleaned all fuel filters from the tank to the VST but haven't checked the filter on the high pressure pump.
When the motor loses power I have tried pumping the primer bulb but makes no difference.

[Greenman]

Just an update, tested high pressure fuel pump yesterday has plenty almost 300kpi at idel but after running under load for a minute loses pressure and motor loses power. Will get a new fuel pump and replace the old one.

[99yam40]

I have cleaned all fuel filters from the tank to the VST but haven't checked the filter on the high pressure pump.

Might want to check that filter before buying a new pump.

Also can you test pressures before the VST to make sure they are good

[Greenman]

I wil do some more test on this motor tomorrow before I remove the VST to inspect the filter. Wil keep u up to date with what I find out.
Thanks Greenman.