Search results | Ford Explorer Forums
  • Ford Explorer Community - Maintenance - Modifications - Performance Upgrades - Problem Solving - Off-Road - Street

    Explorer Forum Covers the Explorer ST, Explorer Sport, Explorer Sport Trac, Lincoln Aviator,
    Mercury Mountaineer, Mazda Navajo, Ford Ranger, Mazda Pickups, and the Ford Aerostar

    Register Today It's free!

Search results

  1. N

    Troublesome 2002 4.0, hitting brick wall at 4200rpm

    Clogged cat, drilled some holes and I can burn rubber now :)
  2. N

    Troublesome 2002 4.0, hitting brick wall at 4200rpm

    I took the intake hose off and looked in through the throttle body, there's a huge booger of melted plastic behind the egr dump tube. Plugged exhaust causing too much EGR flow. Too much egr flow = lean and melted intake manifold ? :salute: Going to inspect the catalyst tomorrow.
  3. N

    Troublesome 2002 4.0, hitting brick wall at 4200rpm

    The holes in the intake manifold are down in the wells where the main single intake by the throttle body splits into two separate runners.
  4. N

    Troublesome 2002 4.0, hitting brick wall at 4200rpm

    Updates: Fuel pressure comes out to about 65 at idle. The intake manifold leak fixes kind of worked and kind of got bigger. The epoxy cracked a little bit on one of the runners and the other hole got a LOT larger! The idle was getting a lot worse because of the very large vacuum leak. I did...
  5. N

    Troublesome 2002 4.0, hitting brick wall at 4200rpm

    Long story short, she's been a troublesome truck. If grandma drove this truck lightly, she'd never know there were any problems, it's only under high rpm.. 2002 Explorer (non sport) 4.0, about 145k. Symptoms: NO high rpm power, tapers off till about 4200 rpm tops. If you floor it and hold...
Back
Top