Bucking when cold
Hotshot
Joined: Jun 2007
Posts: 10,008
Likes: 7
From: Austin, TX
Now if you were to break out a scan tool and look at the data stream and notice the IAT reads nowhere near the outside air temp(like mine reports around 50* even though it may be 110* or 15* outside), then we would have a common denominator.
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Lead Driver
Joined: Oct 2010
Posts: 5,127
Likes: 44
From: Columbus, Oh
When I say mine is gone, I mean it's GONE... MISSING. The sensor is not there at all, just a plug with no sensor in it. I'm not sure if this will cause problems or not.. If the sensor is there and just laying on your fender, your good. It doesn't need to go in the 6637, just leave it on the fender.
Now if you were to break out a scan tool and look at the data stream and notice the IAT reads nowhere near the outside air temp(like mine reports around 50* even though it may be 110* or 15* outside), then we would have a common denominator.
Now if you were to break out a scan tool and look at the data stream and notice the IAT reads nowhere near the outside air temp(like mine reports around 50* even though it may be 110* or 15* outside), then we would have a common denominator.
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Lead Driver
Joined: Oct 2010
Posts: 5,127
Likes: 44
From: Columbus, Oh
I could use some warmer weather, not to mention that music scene you have down there
Posting Guru
Joined: Nov 2003
Posts: 1,949
Likes: 0
From: Near DC
I have the same issue. Started about a month ago. Outside temps aren't cold when it happens. It happens even after the engine is at operating temps.
I do have my IAT attached, just hanging in the free air (6637).
I replaced the CPS (from dealer) and fuel filter, no dice.
I know oil level can make weird stuff happen, but I'm only a half quart down.
Not throwing any codes either.
After reading this thread, I disconnected the IAT and snapped it back in a few times. I don't know if it made a difference, haven't had the chance to drive it yet.
Got to make a three hour trip this afternoon, we'll see....
I also noticed a slight amount of diesel in the valley, guess it's time to replace the o-rings on the fuel bowl drain.
There is another current thread on this problem at:
https://www.ford-trucks.com/forums/1...nning-odd.html
I do have my IAT attached, just hanging in the free air (6637).
I replaced the CPS (from dealer) and fuel filter, no dice.
I know oil level can make weird stuff happen, but I'm only a half quart down.
Not throwing any codes either.
After reading this thread, I disconnected the IAT and snapped it back in a few times. I don't know if it made a difference, haven't had the chance to drive it yet.
Got to make a three hour trip this afternoon, we'll see....
I also noticed a slight amount of diesel in the valley, guess it's time to replace the o-rings on the fuel bowl drain.
There is another current thread on this problem at:
https://www.ford-trucks.com/forums/1...nning-odd.html
Posting Guru
Joined: Nov 2003
Posts: 1,949
Likes: 0
From: Near DC
In the thread I listed in the previous post, a member stated that he cleaned the FPR screen and it seems to have cured the bucking. He said it was pretty clogged.
I'll try that too, but it would seem odd that I have power when stomping on it but bucking when going easy on it.
I snapped the IAT in and out a few times yesterday and drove about 90 miles without it plugged in.
Didn't make a difference.
I'll try that too, but it would seem odd that I have power when stomping on it but bucking when going easy on it.
I snapped the IAT in and out a few times yesterday and drove about 90 miles without it plugged in.
Didn't make a difference.
Thread Starter
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Lead Driver
Joined: Oct 2010
Posts: 5,127
Likes: 44
From: Columbus, Oh
In the thread I listed in the previous post, a member stated that he cleaned the FPR screen and it seems to have cured the bucking. He said it was pretty clogged.
I'll try that too, but it would seem odd that I have power when stomping on it but bucking when going easy on it.
I snapped the IAT in and out a few times yesterday and drove about 90 miles without it plugged in.
Didn't make a difference.
I'll try that too, but it would seem odd that I have power when stomping on it but bucking when going easy on it.
I snapped the IAT in and out a few times yesterday and drove about 90 miles without it plugged in.
Didn't make a difference.
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Senior User
Joined: Sep 2009
Posts: 128
Likes: 0
From: Marion, Virginia
I seem to have a similar problem atm... Though it's almost like my truck wants to shut down, but it picks itself right back up not even a second later. Thought maybe the cps was going out, changed it but no dice. Fuel Filter, Fuel Treatment etc, still nothing. It had a horrible spell this morning on my way to work, was happening every few seconds. Not sure what this could be?
Thread Starter
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Lead Driver
Joined: Oct 2010
Posts: 5,127
Likes: 44
From: Columbus, Oh
I seem to have a similar problem atm... Though it's almost like my truck wants to shut down, but it picks itself right back up not even a second later. Thought maybe the cps was going out, changed it but no dice. Fuel Filter, Fuel Treatment etc, still nothing. It had a horrible spell this morning on my way to work, was happening every few seconds. Not sure what this could be?
Fleet Owner
Joined: Aug 2004
Posts: 20,418
Likes: 197
From: AZ
Alot of people don't think this is a good idea but worked for me once. I emptied my fuel filter container and filled it with Power Service and started it up. Let it idle for a little bit then turn it off for overnight letting it sock. The next day run it hard.
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Lead Driver
Joined: Oct 2010
Posts: 5,127
Likes: 44
From: Columbus, Oh
I've heard of doing this with Diesel Kleen. I'm assuming this is a similar product
Posting Guru
Joined: Nov 2003
Posts: 1,949
Likes: 0
From: Near DC
I too ran a bottle of Diesel Kleen through it, a little higher concentration than it called for. No difference.
Yesterday I had a scan tool plugged in. No stored codes.
On a 90 minute highway trip yesterday, the SES light came on for about one second two different times. When it did, there was no power when I hit the pedal.
But a second later, it caught.
How do I get to the FPR screen??
Yesterday I had a scan tool plugged in. No stored codes.
On a 90 minute highway trip yesterday, the SES light came on for about one second two different times. When it did, there was no power when I hit the pedal.
But a second later, it caught.
How do I get to the FPR screen??
Thread Starter
|
Lead Driver
Joined: Oct 2010
Posts: 5,127
Likes: 44
From: Columbus, Oh
I too ran a bottle of Diesel Kleen through it, a little higher concentration than it called for. No difference.
Yesterday I had a scan tool plugged in. No stored codes.
On a 90 minute highway trip yesterday, the SES light came on for about one second two different times. When it did, there was no power when I hit the pedal.
But a second later, it caught.
How do I get to the FPR screen??
Yesterday I had a scan tool plugged in. No stored codes.
On a 90 minute highway trip yesterday, the SES light came on for about one second two different times. When it did, there was no power when I hit the pedal.
But a second later, it caught.
How do I get to the FPR screen??