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**Halon** · 09-22-2011

Fuel rail pressure will go up when you overrun the stock FPR, most noticeable at idle/low load. At a higher fuel pressure, the injector will flow more fuel, hence the richer idle. I'm not saying that caused your problem, I'm just surprised you were running dual pumps on the stock FPR.

09-22-2011	#19
Halon Pewp Champion Join Date: Nov 2003 Location: Blaine Drives: Teh Bean Posts: 12,309	Re: Project XXX AWD WHP Or Bust! Fuel rail pressure will go up when you overrun the stock FPR, most noticeable at idle/low load. At a higher fuel pressure, the injector will flow more fuel, hence the richer idle. I'm not saying that caused your problem, I'm just surprised you were running dual pumps on the stock FPR. __________________ B-Man - FlexFuel Mafia 1991 TSi AWD E85 - BEP S362, DSMLink V2, Built 2.0L Idle Vid 628hp Graph 541hp Vid 10.93@137 Vid 1992 SC300 E85 - BW 84-75, Vlad Infinity, NA-T, 6spd Idle Vid 709hp Graph 709hp Vid 11.1@131 Vid 2006 Bayliner 195 - Carbed 5.0 Top Speed Test Last edited by Halon; 09-23-2011 at 01:13 AM..