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Old 08-16-2010, 10:34 AM   #1
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High RPM's on startup

Can anyone tell me if it is normal to have high rpms on startup. It last for about 20-30 seconds. In that time if you shift into drive or reverse it jerks hard because of the engine speed. Sorry can't tell you what the rpms are.

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Old 08-16-2010, 12:34 PM   #2
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High RPM's on startup

First of all

I don't think what you describe is normal. What year is your truck and what is the mileage?
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Old 08-16-2010, 03:23 PM   #3
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Old 08-16-2010, 05:08 PM   #4
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High RPM's on startup

Welcome aboard Vanilla Hemi - we're glad you joined us! Yes - that doesn't sound right at all... when was the last time the truck was serviced?
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Old 08-16-2010, 11:27 PM   #5
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Old 08-17-2010, 09:45 PM   #6
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High RPM's on startup

Wait for the RPMS to come down to normal 500ish idle before shifting into gear. It is normal mine has done it ever since I have owned it, it is the cold start high idle. Up here in the winter it will last even longer than the 20-30 seconds, you just have to wait for the PCM to switch to the normal idle fuel table.
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Old 08-17-2010, 10:29 PM   #7
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High RPM's on startup

my truck does the same thing when its 1st started up and then will slowly drop below 1000 rpms..my brother always asked me why it idles so high,its been doing it since i had it..
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Old 08-17-2010, 10:30 PM   #8
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