lean AFR 6500 RPM but 5bar Fuel pressure???
 

What would likely cause lean AFRs at 6500+ RPM but gets 5bar Fuel pressure at the rails???

All fuelling is spot on everywhere else but at 6500+rpm the afr go to 13afr. All fuel components are new.

Anyone ever experienced this?

:confused:

5bar of fuel pressure means you're running about 30psi of boost at 6500 RPM...is that correct?

If so, it sounds like you are using a big turbo that may simply be flowing too high a mass airflow for the pump to keep up.

Yes that is correct.

I have an inline fuel pump as well and that would normally be more than enough as this is a gt30 turbo for supplying fuel.

As I increase fuel in the maps it gets leaner, it's like the map is doing nothing and the injector duty reads 90-100% in evoscan which should not be true as it reads 70% at 5700rpm then jumps up. It should typically reach max 80% at this power level.

Any ideas?

inline pump aswell as what? is the pump feeding the "big inline" choking it?
it very much sounds like a fuel delivery issue
what injectors?

rc1000 injectors + walbro.

How would a walbro choke a 044 bosch pump?

something inline choking delivery...

- Bryan

are you not supposed to feed a swirl pot with the walbro then the inline draws from that rather than thru the walbro?
the walbro could easily out pace the bosch for volume when used as a lift pump as the volume flow is proportional to the pressure and in a lift pump setup pressure is very low in the lift.
?
all properly wired with decent chunky wires oracle?

Haha The inline is fine and not the problem.

I was wondering if any one has experienced this lean issue with the ecu/map.

This issue has been replicated with standard injectors too and no inline.

have you tested the injector resistor?

Culprit was injector resistor. The only thing not tested.

I have removed it, hope it maps as before without it...

Update, problem now exists so the resistor pack is not the issue.

I wonder if there are any bugs with the software???

not likely O.
how old is the walbro filter? did you say it was hard wired?
its not somehthing daft like lean spool setting at high end?

Are you using speed density?

nope, maf.

Put Hydra on and it is fine.

seems like something wrong with map, maybe bug etc. But map works on other cars and worked before OK. Now seems to lean out at 6k rpm despite what I do.

Very strange?

Might have to go autronics route now...

Any ideas guys?

are you running leanspool?