Hilux Misfire?

[Bucksdeermanager]

Hi All
Looking for some advice. I have a 2014 Toyota Hilux 3.0 D4D with 112,000 miles on the clock. It has started ‘juddering’ when accelerating between 25-35mph. It’s smooth before and after that. It’s been fully serviced and had a new prop shaft and central bearing around 13 months ago.

My local garage initially suspected the fuel injectors and these have been tested and are under fuelling the engine, but still working. The garage have suggested replacing all 4 injectors to rule these out as the potential culprit, but that’s a £2k bill and might not solve the issue.

Any ideas as to what else it could be?

TIA

 

[HonestJohn]

Mine had this, 13 hilly, it was unbalanced wheels due to balance weights falling off. I’d start there

 

[Bucksdeermanager]

Mine had this, 13 hilly, it was unbalanced wheels due to balance weights falling off. I’d start there

I’ll check!

 

[HonestJohn]

I’ll check!

I’d say, if it’s balance, you’ll feel it in the steering wheel of course. If no juddering in the steering wheel, that’s not it have you changed fuel and air filters? About 4 minute £20 job

 

[Bucksdeermanager]

I’d say, if it’s balance, you’ll feel it in the steering wheel of course. If no juddering in the steering wheel, that’s not it have you changed fuel and air filters? About 4 minute £20 job

I don’t think it is wheel weights then as it’s not that noticeable in the steering wheel. Fuel and air filters were changed 6 months ago.

 

[moeggesit]

I had similar and found one of the wheels were not round, one tyre had a buldge on the running surface but could only find it with the wheels removed and rolling over the ground.by hand.

For diagnostics. If it only happens at a certain speed, look at all the things which is constant frequency at those speeds.

To try and rule out the engine, run it through the gears to see if it only happens at certain rpm or not at other rpm. Similarly the gearbox.

If it only happens at those speeds irrespective of any gear or engine rpm, I’d look at the suspension and wheels and drive shafts.

 

[Donkey Basher]

I don’t think it is wheel weights then as it’s not that noticeable in the steering wheel. Fuel and air filters were changed 6 months ago.

Were they changed for genuine parts?

Different vehicle I accept, but, we had our FL2 serviced by a local garage last year & they replaced the fuel filter as part of the work. Roll on 3-4 months & we were getting limp mode but with no fault codes showing. Turned out the aftermarket fuel filter had failed. Replaced with a genuine one & bingo all good again.

Been a long time since I’ve had a manual car but could what you’re experiencing be the dual mass fly wheel?

 

[VSS]

Can't you get the injectors recalibrated, instead of replacing them? I have sent injectors away for recalibration in the past. Admittedly tractor, not hilux!

 

[Taff]

Change your garage
“My local garage initially suspected the fuel injectors and these have been tested and are under fuelling the engine, but still working. The garage have suggested replacing all 4 injectors to rule these out as the potential culprit, but that’s a £2k bill and might not solve the issue.
Take to a diesel specialist, most garages are just basic service centres. But first as suggested change fuel filters.

 

[Bucksdeermanager]

I had similar and found one of the wheels were not round, one tyre had a buldge on the running surface but could only find it with the wheels removed and rolling over the ground.by hand.

For diagnostics. If it only happens at a certain speed, look at all the things which is constant frequency at those speeds.

To try and rule out the engine, run it through the gears to see if it only happens at certain rpm or not at other rpm. Similarly the gearbox.

If it only happens at those speeds irrespective of any gear or engine rpm, I’d look at the suspension and wheels and drive shafts.

Good idea. I’ll try that.

 

[Bucksdeermanager]

Were they changed for genuine parts?

Different vehicle I accept, but, we had our FL2 serviced by a local garage last year & they replaced the fuel filter as part of the work. Roll on 3-4 months & we were getting limp mode but with no fault codes showing. Turned out the aftermarket fuel filter had failed. Replaced with a genuine one & bingo all good again.

Been a long time since I’ve had a manual car but could what you’re experiencing be the dual mass fly wheel?

They were.

 

[Bucksdeermanager]

Can't you get the injectors recalibrated, instead of replacing them? I have sent injectors away for recalibration in the past. Admittedly tractor, not hilux!

I have no idea! I’ll find out…

 

[B&W FOX]

If it turns out to be anything fuel injector related I would highly recommend
agngdiesel.com in Bicester for testing. rebuilding and calibration.

My hilux had an aftermarket TDI tuning box fitted and through up all sorts of random running faults. Perfect after it's removal.

 

[Yorkie]

I have no idea! I’ll find out…

Hi.
Have you a trustworthy mechanic that will have actually changed the filters and not just said they had? I have had this happen to me by a main dealer.

They charged me for a fuel filter change as part of the service. My filter is hidden under the plastic engine cover, when i took it off to clean it i saw a very old and dirty fuel filter.

 

[Donkey Basher]

Another thing to check is gearbox or engine mounts - sounds daft but could be a simple fix if one of them has broken.

 

[hendrix's rifle]

Hi.
Have you a trustworthy mechanic that will have actually changed the filters and not just said they had? I have had this happen to me by a main dealer.

They charged me for a fuel filter change as part of the service. My filter is hidden under the plastic engine cover, when i took it off to clean it i saw a very old and dirty fuel filter.

That's because they get paid bonuses to charge for parts + not fit. Lad I know makes a pretty penny in "bonuses" from just that.

Disgraceful practice mind.

 

[ruger77]

If it’s an injector the knock sensor should pick it up I would be looking fuel rail pressure switch or wiring

 

[hairlesshunter]

How and where do you drive road or of road or both one more than the other look at this first and then delve in to the problem with with the one you do most
Short long journeys
They all have a impact on on a 12 year old motor
Also have you checked your leaf springs and coil springs I believe mine had both but was a 2005

 

[hairlesshunter]

How and where do you drive road or of road or both one more than the other look at this first and then delve in to the problem with with the one you do most
Short long journeys
They all have a impact on on a 12 year old motor
Have you checked your leaf springs and coil springs mine I believe had both but it was a long time ago and a 2005

 

[sillbeam]

If it's an injector/fuel issue alone, it would usually show symptoms at particular rev/engine load range, and not a particular road speed.
Unfortunately the world is full of fitters and not mechanics....there's a big difference.
Your "mechanic" should prove the fault, not just fit parts until it's solved.