Cuts out a 80mph
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Senior User
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Cuts out a 80mph
OKay so I was going somewhere yesterday and need to get there!
My trucks starts to buck and won't go any faster than 80mph.
Please don't tell me about my speed
just tell me if the truck is defueling and if the factory shuts these off at this speed?
I do not have any mods done?????
My trucks starts to buck and won't go any faster than 80mph.
Please don't tell me about my speed
just tell me if the truck is defueling and if the factory shuts these off at this speed?I do not have any mods done?????
Senior User
Joined: Jul 2006
Posts: 101
Likes: 0
OKay so I was going somewhere yesterday and need to get there!
My trucks starts to buck and won't go any faster than 80mph.
Please don't tell me about my speed just tell me if the truck is defueling and if the factory shuts these off at this speed?
I do not have any mods done?????
My trucks starts to buck and won't go any faster than 80mph.
Please don't tell me about my speed
just tell me if the truck is defueling and if the factory shuts these off at this speed?I do not have any mods done?????
You'll need to indicate what truck you have F250, F450... If I don't mistake the F250 is limited to 94 miles/hour..
Token Redneck
Joined: Jun 2007
Posts: 9,335
Likes: 344
From: Breckenridge, TX
From the size of the wheels in your avatar, I'm gonna go with you have a 450. With the detuned engine and the 4.88s, you probably are hitting some kind of rev limiter/ governor in the PCM.
Super Moderator
Joined: Oct 2005
Posts: 24,308
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From: SW Virginia
Rick, your truck has the 4.88 gears if I remember correctly. If this is the case, it's programmed from the factory to for fuel cutout at 82 MPH on the F-450s. So it is governed, so to speak, to 82MPH.
Token Redneck
Joined: Jun 2007
Posts: 9,335
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From: Breckenridge, TX
Lots of 19.5" tires (and 22.5" and 24.5" for that matter, since we're talking commercial tires) are rated by the mfg. to have a 75-80 mph speed rating. I don't know how likely a tread sep is on something as light as an F-450, but there's probably a nasty liability problem for Ford somewhere in this governor
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From: SW Virginia
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Just as I thought my 450 has training wheels on it
Hmmm..just one more reason I need a Spartan
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It has been running real good lately...9,500 miles on the clock we changed the oil and I thought I didn't get the oil plug tight but after checking it I still see a drip of oil on the floor.
I will have to get it up on the lift and inspect it further.
I ran out to state college yesterday and I ran it real hard well it would have been harder if I could have got a little more mph
average around 11.2 on the lie-o-meter
Still could use a little pulling power when loaded.
Another good reason for a Spartan
I will have to get it up on the lift and inspect it further.
I ran out to state college yesterday and I ran it real hard well it would have been harder if I could have got a little more mph
average around 11.2 on the lie-o-meterStill could use a little pulling power when loaded.
Another good reason for a Spartan
Former Vendor
Joined: Mar 2004
Posts: 4,362
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From: Hendersonville, NC
It has been running real good lately...9,500 miles on the clock we changed the oil and I thought I didn't get the oil plug tight but after checking it I still see a drip of oil on the floor.
I will have to get it up on the lift and inspect it further.
I ran out to state college yesterday and I ran it real hard well it would have been harder if I could have got a little more mph average around 11.2 on the lie-o-meter
Still could use a little pulling power when loaded.
Another good reason for a Spartan
I will have to get it up on the lift and inspect it further.
I ran out to state college yesterday and I ran it real hard well it would have been harder if I could have got a little more mph
average around 11.2 on the lie-o-meterStill could use a little pulling power when loaded.
Another good reason for a Spartan
As for the power and mileage....
Senior User
Joined: May 2009
Posts: 311
Likes: 1
From: Clearwater
F250s & F350s are governed at 95 mph, F450s and F550s are governed 81 mph. FYI the truck also sets a continuous memory code (not a cel) so technicians can know if you have been driving up against the limiter.
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