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s1ngletracker · 09-22-2011

It's really hard to say what caused the failure. I can't really even see whats going on in your pictures. Get it taken apart and take more pictures.

To answer your fueling question, yes, the increase in rail pressure is due to the orifice in the stock FPR being too small to bleed off the excess fuel flow from the dual pumps and causing pressure to build. This makes your car run too rich. What Shane was talking about regarding low load, at idle or otherwise low engine load is when the most fuel is being bled out the FPR and returned back to the tank as your engine requires little to run. The pumps are operating at full output all the time, regardless of your engine RPM or load.

09-22-2011	#56
s1ngletracker Join Date: Oct 2005 Location: The land of the next-gen HMMWV Drives: A BMW Posts: 1,875	Re: Project XXX AWD WHP Or Bust! It's really hard to say what caused the failure. I can't really even see whats going on in your pictures. Get it taken apart and take more pictures. To answer your fueling question, yes, the increase in rail pressure is due to the orifice in the stock FPR being too small to bleed off the excess fuel flow from the dual pumps and causing pressure to build. This makes your car run too rich. What Shane was talking about regarding low load, at idle or otherwise low engine load is when the most fuel is being bled out the FPR and returned back to the tank as your engine requires little to run. The pumps are operating at full output all the time, regardless of your engine RPM or load. __________________ Style's automotive engineer Sponsored by DB Performance (dbptuning.com) A dsm, a bimmer, a DORGE CUMMINZ, and a non running DSM race car... for now. Last edited by s1ngletracker; 09-22-2011 at 07:45 PM..