Cold Start Engine RPM
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Cross-Country
Joined: Apr 2022
Posts: 95
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From: Southern California
Cold Start Engine RPM
First off, thank you for continuing to humor me with my many questions. I've already learned a lot on this forum.
When I cold-start my 89 F-150, it runs at around 2,000 rpm for about a minute before the idle goes down to < 1,000 rpm.
Is this normal for those trucks? This is the oldest vehicle I've owned and I don't really have a frame of reference. Ambient temperature was around 65 F today if that is relevant.
When I cold-start my 89 F-150, it runs at around 2,000 rpm for about a minute before the idle goes down to < 1,000 rpm.
Is this normal for those trucks? This is the oldest vehicle I've owned and I don't really have a frame of reference. Ambient temperature was around 65 F today if that is relevant.
Laughing Gas
Joined: Jan 2023
Posts: 1,172
Likes: 114
First off, thank you for continuing to humor me with my many questions. I've already learned a lot on this forum.
When I cold-start my 89 F-150, it runs at around 2,000 rpm for about a minute before the idle goes down to < 1,000 rpm.
Is this normal for those trucks? This is the oldest vehicle I've owned and I don't really have a frame of reference. Ambient temperature was around 65 F today if that is relevant.
When I cold-start my 89 F-150, it runs at around 2,000 rpm for about a minute before the idle goes down to < 1,000 rpm.
Is this normal for those trucks? This is the oldest vehicle I've owned and I don't really have a frame of reference. Ambient temperature was around 65 F today if that is relevant.
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Cross-Country
Joined: Apr 2022
Posts: 95
Likes: 28
From: Southern California
I do have a tach and it reads 2,000. I just put in a new temperature sensor, and I remember it was even a bit higher before I did that (maybe 2,200).
But I need to clarify. It does not stay at 2,000 for a whole minute. After maybe 10s it comes down to around 1,800, and then that's where it stays for a while.
Warmed up I am seeing around 700 like you.
So that's probably all still normal?
But I need to clarify. It does not stay at 2,000 for a whole minute. After maybe 10s it comes down to around 1,800, and then that's where it stays for a while.
Warmed up I am seeing around 700 like you.
So that's probably all still normal?
Hotshot
Joined: Jul 2020
Posts: 10,534
Likes: 2,662
From: Near Salt Lake City
Totally normal and be glad it does that
Someday it will die after a cold start, and you will have to test and maybe replace the ECT sensor
They idle at fast idle speed according to temperature and slow down as they warm up
Have fun with it
Someday it will die after a cold start, and you will have to test and maybe replace the ECT sensor
They idle at fast idle speed according to temperature and slow down as they warm up
Have fun with it
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