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454 rev question

83' k5

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Joined
Jan 31, 2006
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Location
Northern Indiana
A buddy of mine has a 1998 1 ton chevy with a 454 in it. When he starts it, it revs up high and then settles back down. He was wondering if this is a normal thing or something wrong.
 
Some things to look at:

1. Bad injectors (or injector)

2. Cold start system

3. Problem with cruise control (if it has one)
 
How high of an idle?? My 97 idles high at first, then goes down. My 89 is the same, just does it a little longer till the fluid warms up.
 
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