Attention: TDR Forum Junkies 
I did some searches, but didn't find any post similar to my situation. Seems to be idling rough, and under heavy throttle, the low fuel pressure all the sudden starts fluctuating from 0 to 30 ish psi, and the rail pressure starts doing the same thing from 28,000 ish to 3000 ish psi. The low pressure is always a constant 14psi under every situation, it is a fass pump ecept in this case. The rail is plugged, so it isn't the releif valve. The normal driving rail pressures are between 12,000 and 27,000 psi and 5000 psi at idle still even with this happening. Would the map sensor cause fuel pressure issues?
Does the ecm control the power to the lift pump that would cause it to cut out it and starve the rail if the rail pressure gets to high? But why the rough idle if this is the case.
No codes!!!???
Does the ecm control the power to the lift pump that would cause it to cut out it and starve the rail if the rail pressure gets to high? But why the rough idle if this is the case.
No codes!!!???
