Cold startup - high idle question
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Cross-Country
Joined: Mar 2005
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Cold startup - high idle question
2005 SCab 5.4...our first NEW truck. On cold startup, the idle heads for the stratosphere...ok...3,000-4,000 rpm for about 5-7 seconds. This cant be good on cold bearings with oil still down in the pan or is there a designed-in protection somewhere (quick oil pickup or oil passage with retention) ?
Bill
Bill
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Joined: Dec 2005
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Have 2005 F-150 flareside. Does same thing. Takes 45 to 50 seconds for the idle to come down. If you don't wait until the RPMs come down, the truck will literally jump out of the garage. It can also damage your transmission, so be carefull. After waiting for 45 seconds my garage and home are filled with deadly gas fumes. Dealer said this, the vibration problems, steering wheel shimmy, tire howling, engine pinging, blicker sticking and 4 other problems on my truck are "normal". Ford loves to play pshchological warfare with their Customers (quality is job 1,000,000 not job 1 at Ford).
Dealer refuses to perform TSB 18507 which has fixed this problem on some trucks. One dealer deactivated one of fuel injectors to help fix the problem. Read civil case 2004-0725/WPB.
This is just another Ford F-150 design problem that dates back to 2004. If the Dealer tries to install the magical damper on your truck to fix the idle problem, please advise. Then I'll have heard just about everything there is to hear.
Dealer refuses to perform TSB 18507 which has fixed this problem on some trucks. One dealer deactivated one of fuel injectors to help fix the problem. Read civil case 2004-0725/WPB.
This is just another Ford F-150 design problem that dates back to 2004. If the Dealer tries to install the magical damper on your truck to fix the idle problem, please advise. Then I'll have heard just about everything there is to hear.
Posting Guru
Joined: Jul 2004
Posts: 1,479
Likes: 4
Since the coldest it has got down here was about 38, cold startup on my 04 150 with the 5.4 was about 1500 rpms and dropped to about 750 in a few seconds and stayed at 750 until the temp gauge was almost at normal running temp, then dropped to about 625-650 which is normal.
How can you deactivate an injector, if you do it will only be running on 7 cylinders, that doesn't sound right!
How can you deactivate an injector, if you do it will only be running on 7 cylinders, that doesn't sound right!
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Junior User
Joined: Jan 2004
Posts: 52
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From: Rhode Island
I worked at a Ford dealership until about 3 months ago. I to had questioned the 3-4000 RPM spike on initial start-up, the tech I spoke to said that the computer was programed to do that for the first couple of thousand miles to help seat the rings. I don't know if that is a fact or not, but I did notice that used ones did not race up any more when first started, only the brand new trucks, so mayby..........?
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Senior User
Joined: Jan 2006
Posts: 113
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From: Seattle, Wa
Sounds like a line of pooo. I just picked up an 05 F150 Crew Lariat. It has 150 miles on it and each morning I start it, the idle hits about 1500 RPM, then kicks down to 600 RPM after a few seconds. I am in Seattle, so the weather hasn't been all that cold lately.
Shawn
Shawn
Tuned
Joined: Sep 2005
Posts: 331
Likes: 1
From: Charlton, NY
Shawn,
There has been much discussion on what is "normal" for the 5.4L engine. I would appreciate a little more information. Please tell me what temp the engine is approximately and what the RPM is after 1 second and then after 10 seconds.
Thanks
There has been much discussion on what is "normal" for the 5.4L engine. I would appreciate a little more information. Please tell me what temp the engine is approximately and what the RPM is after 1 second and then after 10 seconds.
Thanks
Senior User
Joined: Jan 2006
Posts: 113
Likes: 0
From: Seattle, Wa
Hey Ted,
No problemo. I have a 5.4L in my truck as well. I grabbed the numbers listed below today after work. The truck had been sitting for 8 hours. The outside air temp was 44 degrees.
Started engine: 1800 RPM
1 second: 1800 RPM
10 seconds: 1200 RPM
20 seconds: 1000 RPM
30 seconds: 900 RPM
I will get another set of number in the morning. One thing for is, I have never owned a vehicle where the cold start system sends the idle over 2500 RPM.
No problemo. I have a 5.4L in my truck as well. I grabbed the numbers listed below today after work. The truck had been sitting for 8 hours. The outside air temp was 44 degrees.
Started engine: 1800 RPM
1 second: 1800 RPM
10 seconds: 1200 RPM
20 seconds: 1000 RPM
30 seconds: 900 RPM
I will get another set of number in the morning. One thing for is, I have never owned a vehicle where the cold start system sends the idle over 2500 RPM.
Junior User
Joined: Feb 2005
Posts: 80
Likes: 0
From: Baton Rouge, LA
I dont have a 5.4 (2003 4.2L V6 M5OD), but if its anything below 45 degrees the engine rockets up to around 2500 on start up, so does my 4.6L in my 99" F250LD. I've always asumed it was normal.
Senior User
Joined: Jan 2006
Posts: 113
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From: Seattle, Wa
I recorded some more numbers this morning after my truck sat all night. The outside temperature was about 44 degrees. There was no significant difference in the numbers this morning. 1800 RMP @ start, 1200 RPM @ 10 seconds, 1000 RPM @ 20 seconds, 900 RPM @ 30 seconds.
After the truck has been run down the road for a while and is completely warm, if you shut it down and restart it a few minutes later, the RPM goes to 1100 then drops down to 800 with in a second or two.
Hope this helps. Good luck.
Shawn
After the truck has been run down the road for a while and is completely warm, if you shut it down and restart it a few minutes later, the RPM goes to 1100 then drops down to 800 with in a second or two.
Hope this helps. Good luck.
Shawn
Tuned
Joined: Sep 2005
Posts: 331
Likes: 1
From: Charlton, NY
Thanks Shawn,
My numbers are similar.
@48F
1 sec - 1800RPM
10 sec - 1400RPM
30 sec - 1000RPM
It sounds like mine is "normal" for a Ford. A friend told me that his older Ford truck (late 80's with port fuel injection) has always cold idled very fast.
I don't like this aspect of Ford. I don't like waiting, but I also don't like dropping it into drive while the idle is still high.
My numbers are similar.
@48F
1 sec - 1800RPM
10 sec - 1400RPM
30 sec - 1000RPM
It sounds like mine is "normal" for a Ford. A friend told me that his older Ford truck (late 80's with port fuel injection) has always cold idled very fast.
I don't like this aspect of Ford. I don't like waiting, but I also don't like dropping it into drive while the idle is still high.
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