1. Welcome to PlowSite. Notice a fresh look and new features? It’s now easier to share photos and videos, find popular topics fast, and enjoy expanded user profiles. If you have any questions, click HELP at the top or bottom of any page, or send an email to help@plowsite.com. We welcome your feedback.

    Dismiss Notice

ford ideling questions

Discussion in 'Ford Trucks' started by james.j.smith, Jan 31, 2011.

  1. james.j.smith

    james.j.smith Senior Member
    from 19033
    Messages: 145

    I have a 1991 ford 250 5.8L what is the correct idel speed for this truck?
     
  2. mrv8outboard

    mrv8outboard Senior Member
    Messages: 197

    I would guess around 750 RPM's. That info is on the under hood decal. You can not just adjust it either. You need to follow the specific procedures to set the idle speed.
     
  3. MickiRig1

    MickiRig1 PlowSite Veteran
    Messages: 3,617

    The Idle Air Control and the Throttle Position Sensor determine your idle speed. Your fuel pressure regulator can effect it too. If it lets too much pressure to the injectors. Other sensor can effect it too. It just depends on what the problem is.
     
  4. james.j.smith

    james.j.smith Senior Member
    from 19033
    Messages: 145

    I just changed the IAC and I'm ideling around 1000 rpm I was wondering if that was to high
     
  5. MickiRig1

    MickiRig1 PlowSite Veteran
    Messages: 3,617

    I would think that's too high. Take the vacuum hose off the fuel pressure regulator when it's running. If the idle increases it's working if not that could be the problem. High fuel pressure or no vacuum to it. If you have the can style vacuum reservoir it may be rusted out.