cold start sequence
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Freshman User
Joined: Jan 2003
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cold start sequence
I was wondering if this was normal:
Anytime I start my truck after its been sitting a while (cold start) it goes through what seems to be a warm up sequence. It idles at about 1500rpm for a minute or so and then drops to about 1000rpm for a few seconds and then back up to 1500rpm for 15 seconds or so and finally returns to normal idle range (about 500 or so). I bought my truck used and have since rebuilt the engine but its always done that. Comments??????
-Jon
'91 F-150 302 EFI 2WD Auto
4" Rancho w/RS9000
4.56 rear diff w/Auburn limited slip
Anytime I start my truck after its been sitting a while (cold start) it goes through what seems to be a warm up sequence. It idles at about 1500rpm for a minute or so and then drops to about 1000rpm for a few seconds and then back up to 1500rpm for 15 seconds or so and finally returns to normal idle range (about 500 or so). I bought my truck used and have since rebuilt the engine but its always done that. Comments??????
-Jon
'91 F-150 302 EFI 2WD Auto
4" Rancho w/RS9000
4.56 rear diff w/Auburn limited slip
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Joined: Nov 2002
Posts: 9,987
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From: Memphis, TN
