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Author Topic: Very high startup idle  (Read 1140 times)

SteveRamm

  • Newbie
  • *
  • Posts: 2
    • 1989 Ford Capri 1.6 convertible, 5 speed manual
Very high startup idle
« on: January 27, 2022, 09:21:02 PM »
Hi all. My idle problem is quite different. It idles high, around 1400 for about 20 minutes then drops back to a nice 900. It always does this, in any conditions. I've had 3 mechanics look at it. I've replaced the idle module, rebuilt the intake manifold and head, cleaned the injectors and serviced the air flow meter. I have the mixture screw all the way in otherwise the startup idle would be around 2000. Any help would be appreciated
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greywolf27030

  • Old-Timer
  • *****
  • Posts: 1660
    • 1991 XR2, 1992 XR2, 1993 XR2
Re: Very high startup idle
« Reply #1 on: January 28, 2022, 09:15:35 AM »
Both of mine idle around 2200 to 2500RPM when really cold. But it takes, maybe 5 minutes for it to warm up. It sounds like you may have a slightly clogged IAC. It has enough water flowing though it that it eventually closes down the idle but it just takes a while. How long does it take for the engine to get up to operating temperature?
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Jack Byrd