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Thread: tbi fpr pressure changing

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  1. #1
    Fuel Injected!
    Join Date
    Feb 2014
    Posts
    51
    Not really seeing any drivability issues wideband does very slightly show leaner. so at this point I try to datalog when it is at the middle fuel pressure for the most part tat way it is only -/+ 1psi. I just figured out how to add 2-3 more psi since I was maxed out with the red spring and there was no spring for the 23-27psi range. added a spring from a rear brake cylinder from a 95 c1500 inside the red spring and it gave me just over 25psi 1 turn from maxed out on the fpr, then backed it down to 2/3 the fpr and I an at 24psi which is where I needed to be. I took a test drive today with this and started with 24 and when I came home it was 23.5 but that was a 15 minute drive.

    Any way my thinking is temp causing it but was asking around to see anyone else's thoughts

  2. #2
    Fuel Injected!
    Join Date
    May 2019
    Location
    Hampstead, MD
    Posts
    93
    Maybe someone else with more experience will chime in

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