Subject	High Fuel Pressure
Posted by	bentotdagr3at on April 14, 2019 at 9:45 AM
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Message	I've done a search and could not find a direct answer to my concern. I'm running walbro 485 with bypassed FCPU as it died. What's the culprit for not being able to lower my fuel pressure even with a large Tomei fuel regulator, which is brand new as of last year? It's running 42psi with the vacuum on. Pump primes at 44psi with the key on. The vacuum line pulls -10psi. I also tried difference vacuum sources with no luck. I was running a Nismo fuel regulator at first but that would only go 48psi the lowest so I installed the Tomei L regulator thinking it would solve my problem. I pretty much have the same set up as Nick@CZP but I can't seem to lower the pressure as the regulator is maxed out at the lowest. Traced lines to gas tank and no kinks. Are the return lines to small fro this pump? I'm running a bit rich at idle, between 11-12, so it's a bit concerning. Thanks
Follow Ups	High Fuel Pressure - bentotdagr3at 09:45:13 04/14/19 Regulator and/or returnline overrun... - kickerzx 10:13:03 04/14/19 Re: Regulator and/or returnline overrun... - bentotdagr3at 10:34:17 04/14/19 Personaly i would find a solution to spin down the pump. - kickerzx 15:41:33 04/14/19 That's an extremely common set up, ie. The Walbro 485 and - SirpriZ 15:48:28 04/14/19 Re: That's an extremely common set up, ie. The Walbro 485 and - bentotdagr3at 16:19:24 04/14/19 Good luck and follow up with the fix. (n/m) - SirpriZ 22:54:00 04/14/19 Re: High Fuel Pressure - bentotdagr3at 20:37:17 04/15/19 Nicely done, thanks for the follow up. I always am - SirpriZ 20:28:16 04/21/19
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