Fuel Pump Question - ZR-1 Net Registry Forums

4-cam · 04-23-2012

Both pumps were replaced, Fuel filter is new, and I have a consistent 52 psi on the fuel rail all the way to 7000 + rpm. As she passes the 7k mark it throws the code. It didn't do this last year with he old injectors and coils, but had the dreaded flywheel knock and a didn't run very strong on the bottom end. Past 4k rpm it took off and ran great. Figured the injectors were toast as they were the originals. The only difference between now and last year is new MSD coils and new Accel injectors. The original prom was reprogrammed so I don't have another one to try.
Corey programmed my prom for the secondary removal so I will contact him to see if he added some fuel to go along with the top end porting.

04-23-2012	#11
4-cam Join Date: Feb 2010 Location: Arvada Colorado Posts: 192	Re: Fuel Pump Question Both pumps were replaced, Fuel filter is new, and I have a consistent 52 psi on the fuel rail all the way to 7000 + rpm. As she passes the 7k mark it throws the code. It didn't do this last year with he old injectors and coils, but had the dreaded flywheel knock and a didn't run very strong on the bottom end. Past 4k rpm it took off and ran great. Figured the injectors were toast as they were the originals. The only difference between now and last year is new MSD coils and new Accel injectors. The original prom was reprogrammed so I don't have another one to try. Corey programmed my prom for the secondary removal so I will contact him to see if he added some fuel to go along with the top end porting. Last edited by 4-cam; 04-24-2012 at 01:49 AM.