Cleaning out the secondary air rails?

[sbobev (Steve)]

@Andy_Broadbent

As you know the production numbers of these relatively late model 6.0 V12s are so so limited that practically no one knows the real answers to virtually any FF code.

After some major work on my car including the manual conversion, driving it some 500+ miles later @ 80mph I got an FF34 code - 1st code ever in 12 years of ownership - but just about everything in the engine bay had been disturbed/removed & re-connected.

From memory FF34 relates to the A bank injectors, so I’m panicked, thinking that one or more aren’t delivering fuel & I’m at risk of melting a piston but the exhaust on both banks at Rickover is showing an even beat with no misfiring - so, I put the car away &'left it for a while, I’m going to drive it on a 120 mile round trip early Saturday morning with my fingers crossed that the FF34 doesn’t re-appear.

Yup… same story here Andy.

6.0L V12 - sudden rough idle, loss of power and DTC FF36

Waiting for someone to chime in, I did spend more time reading and searching. Conflicting views and no clear path forward. Many suggest that the FF36 points at injectors (B-bank) not firing properly due to an O2-sensor being faulty, but I have tried playing with the injectors and know that the 36CU flags FF44/FF45 when something is amiss on that circuit. Another lister claimed that his problem (FF34 A-bank injectors) was solved by replacing the ignition amp Anyone else that had FF34 or FF36…

I cannot say, however, that this is the first time I see CEL

Steve