Mk7 throttle position 92.94%

[123rambo]

Hi everyone its my first post so go easy. I have a 2012 ford transit fwd with a 2.2 engine. A good few months ago I started the van up and noticed the van was shaking while idling. I plugged in IDS and found no fault codes to be present so began investigating. While reading the live data I stumbled across an issue with the readings on the throttle body. The throttle position was stuck on 92.94%, commanded throttle does not move from 0.00%, throttle motor signal is stuck on 4.71% and throttle position sensor voltage stays at 0.37 volts. So far I've replaced the throttle body, had the ecu changed and reprogrammed and tested all wires from the ecu to the throttle body for continuity. All turned out to be OK. I've also tested the pedal readings and all look normal. Any help would be much appreciated. Thanks

[tranmx2]

The throttle and accelerator are different units.

From that which I have read of it and concluded.

The throttle position is related to the EGR position. As the EGR opens the throttle closes.
Activation of the EGR is via the PCM which looks at engine rpm, vehicle speed, accelerator position, inlet air temp, manifold air pressure, DPF temps and presure, turbo vane posiion, engine coolant temp, engine oil temp, plus maybe some more.
The EGR is opened for example when the engine is under a light load - cruising on a motorway.

92.94% - is that open or closed what is 100%?

The image shows DRPMIS 840 so likely the actual rpm is about the same - as the engine is not under any load the 92.94% could be the throttle open.
As the EGR is likely closed there won't be a command to close the throttle.

IATS2 is at 28C so it looks like the engine has been operating for about 10 mins.

Could do live data again with ECT, (TVP) BPA, IAT, MAP, MAF, RPM, CAT, APP D E 1 2, D DPF, EGR. Better to have the engine at operating temp. On mine the gauge needle is vertical supposed to = 90C - Forscan ECT is about 70C. The temp shall vary.

[123rambo]

Hi, thanks for replying. The 92.94% is open I'll post the the other values at running temp. Would you expect to see the throttle body values change while revving the van? as they dont alter.

[tranmx2]

Would you expect to see the throttle body values change while revving the van? No.
It is not a throttle as is on a petrol engine. It does the same thing but for a different reason.
When the EGR is open the throttle is closed - the inlet air flow is reduced. Exhaust gas enters from the EGR - less oxygen is required.
The idea is that burning the exhaust gas mixed with inlet air reduces the amount of fuel needed = a lower operating temp - less fuel used for x miles.
When cruising on a motorway is an example of when the EGR and the throttle are operated.
The info' re' why etc is available from the internet.

[knobby1]

I've never really understood the "throttle body" on some Transits....My Euro-4 2.4 140 doesn't even have one.

Lord Knobrot

[123rambo]

Right I've got the readings for the van upto temperature.

[123rambo]

I noticed when applying the throttle the exhaust gas recirculation valve position stayed at 0.00% is that right?

[knobby1]

I noticed when applying the throttle the exhaust gas recirculation valve position stayed at 0.00% is that right?

Is this when driving or sitting idling and revving..?? The engine needs to be under load for the valve to move a significant amount.

Lord Knobrot

[123rambo]

Its was while revving, as I've said before its lumpy while idling and when revving and I'm running out of ideas.

[tranmx2]

Re' Knooby - engine needs to be under some load.
Don't see where you previously mentioned the lumpiness.

The first image is of the engine at idle with ECT at 75C so it is at or near to operating temp. The 2nd image shows the IAT at 25 C which could indicate the engine is not at operating temp.

To see a range of readings.
It is a good idea to do live data from cold up to operateing temp.
Continue with live data whilst moving the vehicle alter the accelerator to put load on off the engine.
The engine could take 7 mins to get to operating temp - there can be a delay from applying power to when a result is seen of that change. The engine coolant temp is one to watch as there is always a delay.

It could be neccessary to use live data for an hour to note the changes. Active Presenter can be used to video accoustic and imagery from the laptop screen = you have a record of the event. You can record your voice - note where you are and what's happening.
Laptop batteries don't last very long but you might get 45 mins of video.

Lumpiness - fuel, exhaust, inlet air, electrics, seals. Have a look at where the injectors go through the rocker box for little squirts of air/oil. Remove the oil filler cap see what is under its top - listen feel for pulsing.

Re: Oil pouring out of dipstick
Postby Airthies » Fri Apr 05, 2024 8:25 pm

How much air is coming out the filler cap while running?
If there's pressure and a chuffing sound then likely injector seals, if it's firing oil spray everywhere then there's a large passing of compression gas somewhere.

Ideal is zero, or indistinguishable,
A Small draft is ok for an engine with a "few" miles on it, a breeze is not ideal and worth looking into further.
A blast means there's lots of bypass somewhere and this is what will push oil out of places it shouldn't be.

[andz327]

I've never really understood the "throttle body" on some Transits....My Euro-4 2.4 140 doesn't even have one.

Lord Knobrot

Seems to be a euro5 thing mucker

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[knobby1]

I've never really understood the "throttle body" on some Transits....My Euro-4 2.4 140 doesn't even have one.

Lord Knobrot

Seems to be a euro5 thing mucker

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Yeah...I know they're fitted to the Euro-5's...but why..?? No other Transit diesel uses one.

Lord Knobrot

[andz327]

Lol I knew you would malord .....
I always assumed on diesels if you done away with the flap you'd get slightly more performance,,, think it was an old fiat I had that ran much better with flap jammed open and ended up taking the flap oot altogether


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