Ford Ranger 2.5wlt diesel 2005 - Engine revving to 2000rpm in traffic

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Mon 8 Jun 2015 13:42
Ford Ranger 2.5wlt diesel 2005 - Engine revving to 2000rpm in traffic - Fireballxl5
Hi the vehicle has started reving up of its own accord to 2000rpm it's then over responsive on the throttle ang goes very well this happens when sat in traffic. And when started from hot. It does settle down after about a minute
Checked all the small hoses air filter clean ish. Fuel filter changes at usual service interval running with synthetic oil. Returning about 25mpg
Any ideas appreciated
I also have a couple of copies of the UK workshop manual on CD as PDF files. Full specification inc tools needed for specific jobs
thebeeches1@talktalk.net PayPal £9.00
Help identifying the fault with the vehicle much appreciated
Thanks
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Mon 8 Jun 2015 15:29
Ford Ranger 2.5wlt diesel 2005 - Engine revving to 2000rpm in traffic - Dwight Van Driver

Have you checked the mats around the accelerator pedal, may be fouling a full return to normal after pedal used?

dvd

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Mon 8 Jun 2015 16:09
Ford Ranger 2.5wlt diesel 2005 - Engine revving to 2000rpm in traffic - bathtub tom

Is your oil level going down?

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Mon 8 Jun 2015 17:24
Ford Ranger 2.5wlt diesel 2005 - Engine revving to 2000rpm in traffic - hillman

I once had a Vauhall Cresta with organ pedal type throttle pedal and that developed the same problem. I found that the hinge at the bottom of the pedal was fouled up with dust and rust at the back. When I cleaned it the problem was solved.

I've read that diesels sometimes run on when switched off and have to be driven up to a wall, put into top gear and then the clutch slowly released to stall the engine. I think it's somehing to do with pressure in the sump.

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Mon 8 Jun 2015 17:31
Ford Ranger 2.5wlt diesel 2005 - Engine revving to 2000rpm in traffic - galileo

I've read that diesels sometimes run on when switched off and have to be driven up to a wall, put into top gear and then the clutch slowly released to stall the engine. I think it's somehing to do with pressure in the sump.

Not pressure in the sump as such, they are running on their own engine oil, often due to failed turbo oil seals allowing oil into the inlet air.

Lots of examples on Youtube, look for "runaway engines"

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Mon 8 Jun 2015 18:05
Ford Ranger 2.5wlt diesel 2005 - Engine revving to 2000rpm in traffic - old-school-tech

I have seen this a few times after turbo failure, running the engine up with a new turbo fitted and forgetting that the intercooler was full of oil...lucky if its a manual gearbox...you can over[power the engine and bring it to a stop..not so lucky if its an auto...cross your fingers and hope it will be ok..

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Mon 8 Jun 2015 18:39
Ford Ranger 2.5wlt diesel 2005 - Engine revving to 2000rpm in traffic - Fireballxl5
Thanks
That's when some muppet over fill engine oil and a diesels engine will run on its own engine oil
That's not the problem I am experiencing
MK
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Mon 8 Jun 2015 18:46
Ford Ranger 2.5wlt diesel 2005 - Engine revving to 2000rpm in traffic - Fireballxl5
Turbo seal ?..
This truck is used for pulling a van as well as my work horse
Never experience any problems when towing or on a motorway run. But it's a swine if used for a run to Sainsburys It will rev at 2000 rpm when started after a short park up
Fine when cold. Fine when started 1st thing in morning. But after a few traffic miles she will drive herself with no accelerator pedal input from me
Thanks
MK
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Mon 8 Jun 2015 18:33
Ford Ranger 2.5wlt diesel 2005 - Engine revving to 2000rpm in traffic - Fireballxl5
Thanks using original genuine mat its held in place by a metal pin so not able to foul pedal
MK
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Mon 8 Jun 2015 18:37
Ford Ranger 2.5wlt diesel 2005 - Engine revving to 2000rpm in traffic - Fireballxl5
Not any more than normal
Good long runs doesn't use a drop
Stop start town work and maybe 1/2 pint a month
Not an excessive smoker. Replaced the head with a new one about 20,000 miles ago
New valve seals and valves seated etc etc
Thanks
MK
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Wed 10 Jun 2015 14:45
Ford Ranger 2.5wlt diesel 2005 - Engine revving to 2000rpm in traffic - Fireballxl5
Hi again
Had all the electrical plugs apart and spray with carb cleane dry out and re plug no change???
Any mechanics out there with experience of this and some direction much appreciated
Thanks to all for your reply (don't know why they post out of order
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Mon 15 Jun 2015 19:16
Ford Ranger 2.5wlt diesel 2005 - Engine revving to 2000rpm in traffic - Fireballxl5
Up Date
Historically I experienced a touch of lazey starting. Doubling up on glow plug time before starting. But as winter is supposed to have gone I thought I could get away with not replacing the glow plugs.
Well Friday morning out here in the sticks saw us down to 2 degrees C. That a no starter then
Tried some second hand vacume thingies bolted to inlet manifold and it started and worked as normal. Left it over w/e. Monday not freezing around 8 degrees No Start?.
Borrowed my wife's faultless Kia and bought 4 new glowplugsy. Hey presto we have life again in the beast.
Will keep you posted regarding the power surge
Again any Ford/ Mazda mechanics out there with advice greatly welcome
I'll be back!
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