fuel system
Thread Starter
Drifting
Joined: Feb 2009
Posts: 1,408
Likes: 0
From: Hoffman Estates Illinois
fuel system
My nitrous is finally complete and tuned for. I took the car out to do some pulls and when the nitrous would hit, i would get a huge lean spike and my lean shut down switch would cut the system off. I did a couple pulls watching the gauges and noticed my fuel pressure would spike down a good 20psi when the nitrous hit than system would cut off.
So were thinking either i have a fuel restriction or my fuel pump isn't keeping up with the nitrous. I know on the 04Z the fuel pump/regulator and i guess also the Filter is all inteernal. I was wondering if anyone has a schematic on the system or where everything is located that could be clogged. I read that the fuel system is a return type system????
My buddy has a c5z also with heads/cam and spray on a stock pump and he isn't having any fuel issues.
i read that you have to drop the tranny and diff just to get the fuel pump..
Any tips/help/input would be great
So were thinking either i have a fuel restriction or my fuel pump isn't keeping up with the nitrous. I know on the 04Z the fuel pump/regulator and i guess also the Filter is all inteernal. I was wondering if anyone has a schematic on the system or where everything is located that could be clogged. I read that the fuel system is a return type system????
My buddy has a c5z also with heads/cam and spray on a stock pump and he isn't having any fuel issues.
i read that you have to drop the tranny and diff just to get the fuel pump..
Any tips/help/input would be great
Last edited by Badd LS6; Aug 11, 2011 at 08:53 PM.
Tech Contributor
Joined: Jan 2007
Posts: 19,360
Likes: 1,127
From: Dyer, IN
My nitrous is finally complete and tuned for. I took the car out to do some pulls and when the nitrous would hit, i would get a huge lean spike and my lean shut down switch would cut the system off. I did a couple pulls watching the gauges and noticed my fuel pressure would spike down a good 20psi when the nitrous hit than system would cut off.
So were thinking either i have a fuel restriction or my fuel pump isn't keeping up with the nitrous. I know on the 04Z the fuel pump/regulator and i guess also the Filter is all inteernal. I was wondering if anyone has a schematic on the system or where everything is located that could be clogged. I read that the fuel system is a return type system????
My buddy has a c5z also with heads/cam and spray on a stock pump and he isn't having any fuel issues.
i read that you have to drop the tranny and diff just to get the fuel pump..
Any tips/help/input would be great
So were thinking either i have a fuel restriction or my fuel pump isn't keeping up with the nitrous. I know on the 04Z the fuel pump/regulator and i guess also the Filter is all inteernal. I was wondering if anyone has a schematic on the system or where everything is located that could be clogged. I read that the fuel system is a return type system????
My buddy has a c5z also with heads/cam and spray on a stock pump and he isn't having any fuel issues.
i read that you have to drop the tranny and diff just to get the fuel pump..
Any tips/help/input would be great
You posted up last month, about a fuel pressure issue, and never followed up with a resolution....or at least confirmed your pressure with a mechanical gauge.
Thread Starter
Drifting
Joined: Feb 2009
Posts: 1,408
Likes: 0
From: Hoffman Estates Illinois
confirmed it today with a mechanical gauge, at idle it is at 59...my junk electrical gauge was reading 80 and when the nitrous hit it spiked down to 60ish..so i guess that would mean that the system is going from 60 to 40..after one of the hits today my car idled down to around 300rpm for a sec than went back to normal
Tech Contributor
Joined: Jan 2007
Posts: 19,360
Likes: 1,127
From: Dyer, IN
confirmed it today with a mechanical gauge, at idle it is at 59...my junk electrical gauge was reading 80 and when the nitrous hit it spiked down to 60ish..so i guess that would mean that the system is going from 60 to 40..after one of the hits today my car idled down to around 300rpm for a sec than went back to normal
Thread Starter
Drifting
Joined: Feb 2009
Posts: 1,408
Likes: 0
From: Hoffman Estates Illinois
the setup has been checked checked triple quadruple checked. First post states the pressure dropped a good 20psi.meaning from 60 to 40 if my junk gauge ready 80 to 60.
i talked to numerous people including my installer, graham at nitrous outlet and speed inc. They all say fuel pump.
i talked to numerous people including my installer, graham at nitrous outlet and speed inc. They all say fuel pump.
Tech Contributor
Joined: Jan 2007
Posts: 19,360
Likes: 1,127
From: Dyer, IN
