Right,

Managed to do a video of some sensor readings in SDD whilst driving. Sadly I forgot to select vehicle speed
which was probably one of the most important ones.. but let me know if anything looks a miss.



Thanks!

Bank 1 MAF is constantly lagging behind. I’m not sure if it’s significant or not though.

Also a bit tricky following the numbers, when it’s not quite clear how you’re driving.

Are you blowing smoke when accelerating hard?

Bit of a long shot, but maybe remove the hoses you replaced and check they are clear and have a look at the throttle bodies in case of debris from the old hoses.

The actuators seem to be regulating flow ok, and pressures seem relatively consistent (although bank 1 does lose a bit of pressure occasionally)

Are you able to monitor the injector “numbers” and fuel pressures?

Find a road where you can start from stop and accelerate hard 2007 3.6 TDV8

MAF 1 i replaced with a new genuine MAF but it read the same and made no difference so I took it off and returned it.

I need to do another drive with vehicle speed showing i think.

No smoke on hard acceleration / WOT

I can monitor injector 'balance' and fuel pressure

Ok. Copy that

Please do a monitoring “run” of the injectors and fuel pressure 2007 3.6 TDV8

How difficult is it for you to get your EGR re map checked?

Is it possible that this has somehow changed/reset, when the boost hose failed?

I know it is unlikely, but it’s one more thing to eliminate.......

So it idles ok, revs freely out of drive. MAFs and MAPs seemingly ok, turbos and actuators functioning ok, just struggles with initial load when accelerating but comes good if accelerator pedal pushed past 50%.

That about the gist of it? 2007 3.6 TDV8

I can get the EGR remap checked but the valves themselves and the inlet manifold have physical blanking plugs installed so no exhaust gas would be able to enter the intake.

Regards symptoms you have got the gist of it yes the car just all round feels lethargic and unhappy. Even when pressing on
past 50% throttle it goes and goes well but it doesn't feel like the engine is freely revving if that makes any sense?

I still think its a trans issue. Probably TC but could be simple flush and filter. When was it last changed. 2007 Vogue TDV8 in Zermatt Silver with Charcoal

Why for the majority of the test was the throttle on such a low opening%? Even right near the end it was only 40-50%. I expected to see quite wide openings at low revs showing low airflow indicating non-performance but the throttle generally was less than 20% open.

Hi Graeme,

I dont think that first video was easy to understand due the lack of vehicle speed. I am about to post another video
with vehicle MPH shown.

Hopefully this one will be better

Right,

As requested by cheezels a video showing 'injector cylinder balancing offset' (Only injector related option?) and fuel pressure.



and another video with MAF. actuators and MAP etc with vehicle speed:

I still think that the throttle position sensor must be faulty as the throttle% never gets high unless basically 100%.

The injectors and airflow seem ok, but as Graeme says, there’s something amiss with the throttle.

It’s also a bit tricky following the the graphs with what looks like non linear acceleration.

Can you do a trace from idle to say 60mph, just stamping on the gas peddle?

I’m pretty sure there’s two throttle position sensors so I’d guess if there’s a difference you should (hopefully) get an alarm.

I did read last night that there’s also a barometric pressure sensor. Can you add that to the trace at some point or check it’s reading sea level pressure (or a pressure corresponding to your altitude)? It’s a bit far fetched, I know.

There also seems to be “boost pressure actuator” and also “command boost actuator”. I’m not sure what is what with these just yet, but again, worth monitoring them. I’d imagine one is the actuator for the turbo vanes and I seem to recall something on the inlet manifolds but I’d have to check the manual.

If you could do a full throttle start off and keep the pedal down until you reach legal speed, it may help us visualise what’s happening.

Re the gearbox. My understanding is the torque converter causes “rumble strip” sensations if it’s failing. However I’m not an expert here  2007 3.6 TDV8

There is only 1 physical TPS but it is a twin system so I agree that a discrepancy would be expected to trigger a fault which would be the reason for having a twin system. However why does the 40-90% range not feature more prominently in the graphs? Is something restricting pedal movement that requires a lot of pressure to overcome, after which the pedal easily goes to full throttle?

Copy that Graeme.

Mariana could verify the function of the throttle sensors just with the ignition on and gradually depressing the pedal through its full range.

You haven’t left a slipper under the accelerator? 😂 2007 3.6 TDV8

Hi Cheezels,

I did a standing start 0 to about 70 -75 ish starting at 5:05 in video 2.

As far as I understand the MAP sensors function as the barometric pressure sensor, I already tried taking a reading
and found it very closely matched the pressure at my altitude at the time of checking. (Already thought about that being a possibility!)

I believe the difference in the boost pressure actuator and commanded boost actuator is one set of readings is what the PCM is commanding the actuators to open to and the other is the actuators actual position. I have checked these previously and
they correlate quite closely so the actuators are reaching the values commanded by the PCM.

Graeme, the pedal sweeps smoothly, there isn't anything stopping its travel. I don't really have an answer as the why the 40-90% range doesn't feature as I did try to accelerate to varying speeds/throttle travel.

I have checked the throttle sensor with the ignition on, engine off and it sweeps just fine through its full range with no spikes or drop outs in the signal.

Can confirm no slipper!