Discussion
Hi,
First post here.
Picked up a 2011 GTR with LS7 here in Australia last week and have been working through a few issues.
Test driving showed some engine hesitation and then had a complete cut-out event after a few successive uphill corners, but wasn't going very quick, that stopped the car and was only able to get it started again after switching tanks. Back home I pulled the fault codes and got System too lean on both bank 1 & 2 errors.
Up on the hoist and nothing looks obviously wrong with the installation, apart from a minor leak on the pre-pump filter. I only have peoples build thread pics to go on as I don't have the original install manual but it seems as though the system is a standard install with the pollack valve and aeromotive pumps and filters set up the factory way. There is no surge tank installed.There has been a bit of fuel smell after driving and particularly on hard braking. The filler caps were a bit loose so I tightened those.
I've read through all the fuel system threads so am aware of the common issues and limitations of the stock system. The car has done 1500 miles only since new, so possibly it just needs the filters and valve cleaned out from new tank debris, so will tackle that next week.
I intend to upgrade the system to tanks with in tank pumps later on but for now just want to get it running cleanly so it can go to dyno and I can do more testing.
One thing that perplexes me is there appears to be no accomodation for tank venting. The two top tank outlets are just joined together with a single hose, and there are no vent line from the filler hoses. Is this normal in the stock installation or did they miss something? How does the system vent itself?
Also what is the recommended idle fuel pressure? The regulator gauge shows 30psi at idle which seems low to me?
Steve
First post here.
Picked up a 2011 GTR with LS7 here in Australia last week and have been working through a few issues.
Test driving showed some engine hesitation and then had a complete cut-out event after a few successive uphill corners, but wasn't going very quick, that stopped the car and was only able to get it started again after switching tanks. Back home I pulled the fault codes and got System too lean on both bank 1 & 2 errors.
Up on the hoist and nothing looks obviously wrong with the installation, apart from a minor leak on the pre-pump filter. I only have peoples build thread pics to go on as I don't have the original install manual but it seems as though the system is a standard install with the pollack valve and aeromotive pumps and filters set up the factory way. There is no surge tank installed.There has been a bit of fuel smell after driving and particularly on hard braking. The filler caps were a bit loose so I tightened those.
I've read through all the fuel system threads so am aware of the common issues and limitations of the stock system. The car has done 1500 miles only since new, so possibly it just needs the filters and valve cleaned out from new tank debris, so will tackle that next week.
I intend to upgrade the system to tanks with in tank pumps later on but for now just want to get it running cleanly so it can go to dyno and I can do more testing.
One thing that perplexes me is there appears to be no accomodation for tank venting. The two top tank outlets are just joined together with a single hose, and there are no vent line from the filler hoses. Is this normal in the stock installation or did they miss something? How does the system vent itself?
Also what is the recommended idle fuel pressure? The regulator gauge shows 30psi at idle which seems low to me?
Steve
The fuel filler necks should have vents on them. Feel all around the rubber neck and you should find a brass spigot moulded into the rubber quite high up.
This is the vent but when manufactured rubber is moulded over the end inside the neck. This is so that the user can decide to use the vent or not. To use it you simply take a sharp knife and cut open the inside end of the spigot.
For a factory install you then connect a vent pipe to each spigot and run it down so it ends about an inch below the bottom of the chassis.
Steve
This is the vent but when manufactured rubber is moulded over the end inside the neck. This is so that the user can decide to use the vent or not. To use it you simply take a sharp knife and cut open the inside end of the spigot.
For a factory install you then connect a vent pipe to each spigot and run it down so it ends about an inch below the bottom of the chassis.
Steve
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