Still not solved power issue- next steps!

[Cochyn]

Hi all, Still not sorted out the loss of power in ourNexxo t660. Changed the turbo booster today as a first cheap fix, no change, still struggling to get up hills compared to previously. Will change EGR next.
Funny thing happened when we parked up after going for a spin and wondering if it's linked. Father in law asked me to give it a rev and it would only go up to about 2800 rpm and no higher. I ;put the clutch in and let it go and then revved extremely powerfully. Going to take it for another spin tomorrow and do this first in case it resets something?? Clutching at straws!! Anyone know if this happens for a reason.
Another post said due to water coming in through the connection in the middle of the scuttle this can impact the TPS electrical connections. We tried to fix this a couple of weeks ago but loads of water on the engine again but it had dried when we got back and under cover til tomorrow when we can put more sealant in the gap. Anyone got any ideas about the TPS electrical issues and any fixes? Many thanks in advance-diolch, Daf

 

[Raul]

Water puddling on top of the engine, from a leaky scuttle it’s a bad sine for injectors. It kills them slowly.

 

[Richard n Ann]

Water puddling on top of the engine, from a leaky scuttle it’s a bad sine for injectors. It kills them slowly.

Doesn't it seize them in?

 

[Raul]

Doesn't it seize them in?

Yes if left corroding for two long. On a trafic van i I had in the past, two came out in pieces, and two broke so bad needed recon engine. And this injectors you have to call a guy out with specialised hydraulic tools.

A diesel specialist will put it on test and see the return fuel, high pump pressure and will figure it out why is down on power.

 

[jockaneezer]

Seeing as you're at the "straw clutching stage" and the mention of the clutch pedal scenario, have a quick look in the pedal area and make sure nothing's slipped down or is restricting the full travel of your throttle pedal (like a flap of carpet, steering column boot, or a section of wiring harness )?
What exactly did you mean when you said "turbo booster", just curious as I can only think of a turbo waste gate actuator, or the variable vane vacuum solenoid ?

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[Landy Andy]

What engine? What age?

Vehicles limiting the rev range on/off the clutch isn’t uncommon

When you say turbo booster do you mean the engine turbo? Whilst off did you check EGR system?

No warning lights i assume.

 

[Raul]

Clutch switch can cut out sometimes, if it has one. Some do.

 

[Landy Andy]

They all have clutch switch.

 

[Raul]

They all have clutch switch.

I didn't know that ALL have, if things have changed when he depressed the clutch, (that's why I mentioned it), then that are should be looked at as well.

 

[Cochyn]

Seeing as you're at the "straw clutching stage" and the mention of the clutch pedal scenario, have a quick look in the pedal area and make sure nothing's slipped down or is restricting the full travel of your throttle pedal (like a flap of carpet, steering column boot, or a section of wiring harness )?
What exactly did you mean when you said "turbo booster", just curious as I can only think of a turbo waste gate actuator, or the variable vane vacuum solenoid ?

This

What engine? What age?

Vehicles limiting the rev range on/off the clutch isn’t uncommon

When you say turbo booster do you mean the engine turbo? Whilst off did you check EGR system?

No warning lights i assume.

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[Cochyn]

What engine? What age?

Vehicles limiting the rev range on/off the clutch isn’t uncommon

When you say turbo booster do you mean the engine turbo? Whilst off did you check EGR system?

No warning lights i assume.

Took it for a good spin up some hills after fitting this and still struggling to get up them where previously flew up them. Was an Amber engine warning light but hasn’t come up recently. Put my basic odm reader on today and came up with this fault again. Not sure how to check the egr system?

 

[Cochyn]

Took it for a good spin up some hills after fitting this and still struggling to get up them where previously flew up them. Was an Amber engine warning light but hasn’t come up recently. Put my basic odm reader on today and came up with this fault again. Not sure how to check the egr system?

View attachment 842749 View attachment 842750

Sorry 2.3 2011

 

[Cochyn]

Water puddling on top of the engine, from a leaky scuttle it’s a bad sine for injectors. It kills them slowly.

Hopefully sorted that today. Put a new batch of sealant on

 

[Cochyn]

What engine? What age?

Vehicles limiting the rev range on/off the clutch isn’t uncommon

When you say turbo booster do you mean the engine turbo? Whilst off did you check EGR system?

No warning lights i assume.

 

[GeoffnDee]

I do not know if it is any help , but , the Fiat X250 training manual in its , powered throttle section , states that if the throttle valve locks the control unit reduces the engine performance to prevent possible damage. So it could be worth looking at the throttle valve operation which is also linked to the exhaust gas / air mixing chamber.

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[Cochyn]

I do not know if it is any help , but , the Fiat X250 training manual in its , powered throttle section , states that if the throttle valve locks the control unit reduces the engine performance to prevent possible damage. So it could be worth looking at the throttle valve operation which is also linked to the exhaust gas / air mixing chamber.

Cheers Geoff but not really sure how to check it’s locked?

 

[GeoffnDee]

The valve is operated by the electric activation assembly that is fitted on the intake manual (the manual states that it is normally open)

 

[Landy Andy]

I didn't know that ALL have, if things have changed when he depressed the clutch, (that's why I mentioned it), then that are should be looked at as well.

Pretty much all vehicles (if not all) these days have clutch switches as they alter the map, and characteristics of the engine depending on where the clutch is, and all vehicles that have cruise control as an option so as it will cancel the cruise control.

Good advice of yours to check it out.

 

[Landy Andy]

This

View attachment 842747

That is the vacuum solenoid. This operates the the EGR valve by allowing suction through the valve.

If you remove the pipe from it to the EGR can you then suck on the pipe (which should open the EGR) then as you remove the suction you should hear the EGR valve pop closed. These often stick in the open position allowing exhaust gasses into the air intake, sticking will stop all the boost from the turbo, and not give the engine the clean, cold, oxygen that it wants.

 

[the1andonly]

Was there an earlier thread with more info?
As Landy Andy says which motor what year? this is important.
Is it the turbo solenoid mounted behind the centre pillar x290, if so it is vaccum operated and controls the turbo actuator. There is a function in multiecuscan to test this device.
the x250 has a vacuum operated EGR the x290 electricaly operated
the error mesage from my lists, can mean egr stuck open or closed.

Fiat 2​	P0402​	EGR Drift positive air control - low air quantity, DC Offset​
Ducato​	P0402​	EGR Valve​
Generic​	P0402​	Exhaust Gas Recirculation Flow Excessive Detected​

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[Cochyn]

The valve is operated by the electric activation assembly that is fitted on the intake manual (the manual states that it is normally open)

Cheers Geoff

Was there an earlier thread with more info?
As Landy Andy says which motor what year? this is important.
Is it the turbo solenoid mounted behind the centre pillar x290, if so it is vaccum operated and controls the turbo actuator. There is a function in multiecuscan to test this device.
the x250 has a vacuum operated EGR the x290 electricaly operated
the error mesage from my lists, can mean egr stuck open or closed.

Fiat 2​	P0402​	EGR Drift positive air control - low air quantity, DC Offset​
Ducato​	P0402​	EGR Valve​
Generic​	P0402​	Exhaust Gas Recirculation Flow Excessive Detected​

Hi. It’s a fiat ducato 2011 2.3 litre. The turbo solenoid is situated/fixed behind the centre pillar.

 

[Cochyn]

Was there an earlier thread with more info?
As Landy Andy says which motor what year? this is important.
Is it the turbo solenoid mounted behind the centre pillar x290, if so it is vaccum operated and controls the turbo actuator. There is a function in multiecuscan to test this device.
the x250 has a vacuum operated EGR the x290 electricaly operated
the error mesage from my lists, can mean egr stuck open or closed.

Fiat 2​	P0402​	EGR Drift positive air control - low air quantity, DC Offset​
Ducato​	P0402​	EGR Valve​
Generic​	P0402​	Exhaust Gas Recirculation Flow Excessive Detected​

It’s the bottom reading i am getting- exhaust gas recirculation flow excessive detected

 

[the1andonly]

Now read previous thread.

It’s the bottom reading i am getting- exhaust gas recirculation flow excessive detected

all 3 are the same code, in different circumstances Fiat are known (as other manufacturers) to modify slightly the code values. Now i know its not an x290 i would concur with Landy Andy that you need to confirm the EGR is working (previously said is clean). The throttle body is also known to be suseptable to skuttle related corrosion and electrical fail and theres a lot of carbon about.

 

[Cochyn]

It’s the bottom reading i am getting- exhaust gas recirculation flow excessive detected

Now read previous thread.

all 3 are the same code, in different circumstances Fiat are known (as other manufacturers) to modify slightly the code values. Now i know its not an x290 i would concur with Landy Andy that you need to confirm the EGR is working (previously said is clean). The throttle body is also known to be suseptable to skuttle related corrosion and electrical fail and theres a lot of carbon about.

Will try what LandyAndy suggested first. Cheers

 

[Landy Andy]

You NEED to know IF the EGR is shutting/operating at all. The engine/ecu doesn’t know this. It just activates things to operate it, and then assumes it is doing what has been asked. If it is stuck open or closed the ecu will be blind to this. There is no sensor on the EGR valve. Checking via blowing air through the EGR cooler to air inlet manifold was the option I took.

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[Landy Andy]

Do you know if you have the original throttle body, or the later uprated one?
They are very different to look at from the front of the engine. The early ones get stuck, and don’t return to the closed position.

 

[Cochyn]

You NEED to know IF the EGR is shutting/operating at all. The engine/ecu doesn’t know this. It just activates things to operate it, and then assumes it is doing what has been asked. If it is stuck open or closed the ecu will be blind to this. There is no sensor on the EGR valve. Checking via blowing air through the EGR cooler to air inlet manifold was the option I took.

Spot on. Will give it a go tomorrow. Cheers

 

[Cochyn]

Do you know if you have the original throttle body, or the later uprated one?
They are very different to look at from the front of the engine. The early ones get stuck, and don’t return to the closed position.

no idea sorry

 

[Cochyn]

You NEED to know IF the EGR is shutting/operating at all. The engine/ecu doesn’t know this. It just activates things to operate it, and then assumes it is doing what has been asked. If it is stuck open or closed the ecu will be blind to this. There is no sensor on the EGR valve. Checking via blowing air through the EGR cooler to air inlet manifold was the option I took.

Tried blowing/sucking and could hear nothing so seems may be the egr. Cheers

 

[Landy Andy]

no idea sorry

This shows new and old style throttle body. The old can be too weak to reopen the air intake so starve the engine of oxygen.