lean AFR 6500 RPM but 5bar Fuel pressure???
Oct 25, 2010, 10:15 AM
#1
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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?
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?
Oct 25, 2010, 01:55 PM
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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?
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?
Oct 25, 2010, 04:01 PM
#7
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?
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?
Last edited by leecavturbo; Oct 25, 2010 at 04:03 PM.
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Oct 26, 2010, 02:50 AM
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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.
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.
Oct 27, 2010, 12:55 PM
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Oct 28, 2010, 04:38 AM
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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?
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?