1978 - 1996 Big Bronco

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Weird Idle on start up

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Aug 29, 2005 | 01:18 AM

#1

GreatWhiteBronc

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Weird Idle on start up

My brono idles very oddly right when i start it up. The idle goes straight to 1200rpm for about 5 seconds, then up to 1500 for about 5 seconds, and then down again. It repeats this cycle until i rev the engine, at which point it rests at it's normal idle very steadily and then proceeds to drive great. Thanks for the help!

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Aug 29, 2005 | 01:41 AM

#2

ford390gashog

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From: Brentwood,CA

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what year? i assume it has a carb in which case it is called the fast idle and kicking it down is normal. you can set the fast idle too.

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Aug 29, 2005 | 01:52 AM

#3

GreatWhiteBronc

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Its actually a 93 bronco, no carb.

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Sep 2, 2005 | 03:17 PM

#4

hambeemer

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Joined: Oct 2003

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From: minnesota

fuel pressure regulator. sits under the intake manifold area. shiny thing with a vacuum line attached to it.

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