Greetings,

 The title says it all really. My 2009 1.4TDCI jumps around - power on/off at 1900rpm in 3rd gear and sometimes 4th. Its like the ignition is being cut on and off very rapidly. It only does it at 1900rpm so accelerating or slowing stops it. My local garage has replaced the fuel filter, MAF sensor and they tell me they have cleaned out the EGR.

Their suggestion now is to book in into Ford's for a firmware update.

Any suggestion ? 1900rpm always seems to be where I need to cruise at.

Thanks

has it always done this? or just started doing it?

Hi isetta thanks for your reply.

It has not always done this. It's only been doing it for the last year.

Hi I have the same problem with my fiesta. Did you manage to figure out the issue ?

On 7/28/2022 at 9:19 AM, Ant270480 said:

Hi I have the same problem with my fiesta. Did you manage to figure out the issue ?

Still not resolved. Still kangarooing / Juddering 3rd 4th gear 1800 - 2100rpm.

I recently had a new full set of injectors and did the fuel filter again but the issue is unchanged. Never had an engine light because of it.

 After having the injectors done I find myself revisiting the issue. A local diesel guy said try running it on BP Ultimate but I'm on the 2nd tank and nothing has changed.

I'm really at a loss with it. It's been around 6 years now.

2 hours ago, colsearle said:

Still not resolved. Still kangarooing / Juddering 3rd 4th gear 1800 - 2100rpm.

I recently had a new full set of injectors and did the fuel filter again but the issue is unchanged. Never had an engine light because of it.

 After having the injectors done I find myself revisiting the issue. A local diesel guy said try running it on BP Ultimate but I'm on the 2nd tank and nothing has changed.

I'm really at a loss with it. It's been around 6 years now.

Did you check the turbo actuator and vacuum system? The RPM range you mentioned is the about the same range that the turbo kicks in. 

If it's done it for 6 years with no change then it's probably just the mapping.

Ford can't seem to map diesels with the same level of finesse as German brands.

On 9/11/2024 at 12:02 PM, therasko said:

Did you check the turbo actuator and vacuum system? The RPM range you mentioned is the about the same range that the turbo kicks in. 

Checked the actuator seems to be doing what it should. I would agree that it is exactly at the point where the turbo kicks in. 

 There are so many posts across the internet with juttering at this RPM. Assides from this problem the van runs like a dream. The engine pulls really hard once I'm above 2100rpm. Starts immediately on the key.

On 9/11/2024 at 1:18 PM, TomsFocus said:

If it's done it for 6 years with no change then it's probably just the mapping.

Ford can't seem to map diesels with the same level of finesse as German brands.

Do you think it needs to go to Ford or will one of the local cowboys suffice ?

 I don't know much about mapping. Will there be just an updated default map or does it have to be customised ?

 Thanks for the reply.

24 minutes ago, colsearle said:

Do you think it needs to go to Ford or will one of the local cowboys suffice ?

 I don't know much about mapping. Will there be just an updated default map or does it have to be customised ?

 Thanks for the reply.

Two options really:

You can have the latest standard map applied.  That can only be done by a Ford dealership and will cost around £150 now.  (Ask them for the latest PCM update.)  Just be aware that may not improve the issue you have.

Or you can try a custom remap.  Generally they add more power as well.  They will cost more.  And should be declared as a modification on the insurance.  But should remove the fault if it is a mapping issue.

No point getting a geberic 'chip' fitted as they still use the original ECU map so unlikely to cure your fault.

4 hours ago, TomsFocus said:

Two options really:

You can have the latest standard map applied.  That can only be done by a Ford dealership and will cost around £150 now.  (Ask them for the latest PCM update.)  Just be aware that may not improve the issue you have.

Or you can try a custom remap.  Generally they add more power as well.  They will cost more.  And should be declared as a modification on the insurance.  But should remove the fault if it is a mapping issue.

No point getting a geberic 'chip' fitted as they still use the original ECU map so unlikely to cure your fault.

Please ignore I cannot find delete post

I keep getting spam firewall is activated for your IP on the computer so having to reply using mobile data on the phone. 

 I've been reading up on how to reset the ECU. Disconnecting battery and then connecting positive and negative leads.

 Could be worth a go ?

Nope, doesn't do a thing, it's an urban myth. The sure way to reset the ECU, is to recode the injectors. BUT, your problem is most likely to be nothing more complicated than a split in a boost pipe, which suddenly opens up as boost builds up, resulting in momentarily loss of boost thro' the split, then as the boost continues to increase, the engine  is happy again.

Just did a can of Mr Muscle in the exhaust side of turbo as suggested by my local garage. No change but the oven looks great.

 I don't know if this will help but normally the Judder appears when I'm changing down from fourth to 3rd and the revs land around 2000 RPM with very light throttle. Then it will definitely judder. It's not really a point where the turbo is winding up.

 Colin (might be best just to give it another six years)

26 minutes ago, colsearle said:

Just did a can of Mr Muscle in the exhaust side of turbo as suggested by my local garage. No change but the oven looks great.

That's for a VNT turbo.  The 1.4 TDCI uses a wastegated turbo.

Well that's somewhat different details from your op, but don't discount a split, they are often concealed and difficult to find 'cos the thick rubber outer has a woven mesh lining that holds the split together, concealing it, till some boost pressure opens it up. Also, the heat over the years will age the rubber, you asked for suggestions ....but it's down to you!

1 hour ago, nicam49 said:

Well that's somewhat different details from your op, but don't discount a split, they are often concealed and difficult to find 'cos the thick rubber outer has a woven mesh lining that holds the split together, concealing it, till some boost pressure opens it up. Also, the heat over the years will age the rubber, you asked for suggestions ....but it's down to you!

All comments and suggestions are very much appreciated.

I spoke with the garage who started the hunt six years back and asked him if he put a smoke test on the inlet which he did. I was considering buying my own smoke machine.

2 hours ago, TomsFocus said:

That's for a VNT turbo.  The 1.4 TDCI uses a wastegated turbo.

My lack of knowledge is shining through. Is a Westgate not a variable vane ? Garage seem to think it would be worth a try.

24 minutes ago, colsearle said:

My lack of knowledge is shining through. Is a Westgate not a variable vane ? Garage seem to think it would be worth a try.

No, they are two completely different systems.

A wastegate is just a single flap that opens at a fixed threshold.

A VNT turbo is constantly variable.  Using around 10 vanes to control the size of the exhaust port.  It works like putting your thumb over a hose.  Small exhaust port means lots of air pressure passing the turbine creating lots of boost.  Large exhaust port means little to no pressure over the turbine creating little to no boost.  The vanes get moved between those two positions to create as much boost as needed for the current conditions of engine load and driver demand.

Hi again all.

 After studying the issue more I thought I would give an updated description of the issue and what causes the judder.

If I am in 3rd or 4th climbing a very slight gradient around 2000rpm and I reduce / lift the throttle ever so slightly, probably just a couple of millimetres on the pedal the car will kangaroo.

Still no dash lights. All suggestions very much welcomed.