DevilMotorSports

well, i replaced my fuel pump and its still doing the same thing.



It just seems odd to me that since last year my regulator has alway held pressure, after the prime or after a drive, and come to find out that you guys are saying its not susposed to.



I always make a back up of my working fuel map before I start making changes to it. That night was no different. I wound up leaning the mix out to much at idle and the car wouldn't stay idleing, so I tried to richen it up back to where it was. I never could get it right, so I reloaded the orignal map that I was working from. After that the car wouldn't start back up. I poped the hood and thats when I noticed I had now static fuel pressure.



Now that you guys say that I'm not susposed to be holding pressure, all my maps are based off the fact that I was. Could it be that there was some type of restiction in the line that took a year to work though the system and now that its gone my maps are all f*cked up?

DevilMotorSports

I received my new regulator from summit today. The new one holds pressure like the old one used to before it messed up. The car now starts and runs ok but won't hold idle but I believe I know whats casuing that.



The pitch of the exhaust note has changed though. It has a lower exhaust note now. Any ideas on why the sound of the exhaust note would change?