2010 Diesel Wagon 2.0

[Sam123]

Hi I have 2010 diesel turbo mondeo. There's 2 issues, first is when I accelerate the car hesitates for abit then it accelerates. Other times, rev will be high but doesn't feel much acceleration.

Second issue is, there's a small round shaped sensor on right side of the engine looking from the front of the car (oil drip found on this sensor). I tried to take photo but air cleaner hoses are blocking the view. This sensor has 2 allan key bolts and sits right below the black component (vaccuum pump?)


I hope someone had similar issue with their mondeo and could help me how to resolve this issue.

[Sam123]

The picture is attached round shaped with connector removed. I wana know what this part is called. I can see oil residues beside it

[cobrin]

that slight hesitation is a combination of things:
1. turbo lag - the time it takes from pedal input till the turbo boost intake air pressure...there's a slight delay because the engine needs to create enough exhaust pressure to spin the compressor to compress the intake air for the engine to use.

A way to minimise that is to slightly load up the transmission (so brake pedal pressed and at the same time slightly apply the accelerator) when your opportunity to slot in traffic comes, you let off the brake pedal and feed in more of the accelerator to suit the situation. This all happens in about 2-3sec so don't hang both on it all day.

2. Torque Limiting - In lower gears (I believe 1st/2nd) the torque converter allows a bit of slip to protect the gears and then slowly locks up eventually giving full power flow from the engine (as can be said). Which is why it'll rise to the highs it does and slowly drops. That and having it raise the rpm like that also allows more torque to be had.

It's also a softer delivery or torque which is why you don't feel it. It's all normal and all controlled by the Powertrain Control Module.

I'll have to look into that sensor cause it's too close to see it's general position for what it does.

[Sam123]

Originally Posted by Sam123

The picture is attached round shaped with connector removed. I wana know what this part is called. I can see oil residues beside it

This sensor is located below the air cleaner compartment fitted in the engine

[rondeo]

Looks like the diesel fuel inlet metering valve (not a sensor).

http://www.dieselpartsdirect.co.uk/e...-valve-kit.htm

My 2011 TDCi has an oil leak showing in the same place.
I couldn't say with certainty where the oil came from
but decided it was from the fuel pump/cyl head joint.
I replace the gasket without using a sealant and it still leaks.
There is a fine line in the aluminium head casting which may be the cause.
Was advised to use an anaerobic Loktite gasket sealant next time.

Usual thing is to clean off and inspect, but it's very hard
with these engines in tight spaces. Maybe UV dye.

[rondeo]

I don't think parts of the explanation on that website are correct though.
Stuff usually cools when the pressure is released, as
per:

https://en.wikipedia.org/wiki/Joule%...Thomson_effect

Some other points look a bit suspect as well, need to look into it a bit more.
The photo is OK.

[Sam123]

Thank you so much. That means this part isn't culprit for the oil residue... i was just wondering why oil was visible there..

[Sam123]

Originally Posted by rondeo

Looks like the diesel fuel inlet metering valve (not a sensor).

http://www.dieselpartsdirect.co.uk/e...-valve-kit.htm

My 2011 TDCi has an oil leak showing in the same place.
I couldn't say with certainty where the oil came from
but decided it was from the fuel pump/cyl head joint.
I replace the gasket without using a sealant and it still leaks.
There is a fine line in the aluminium head casting which may be the cause.
Was advised to use an anaerobic Loktite gasket sealant next time.

Usual thing is to clean off and inspect, but it's very hard
with these engines in tight spaces. Maybe UV dye.

Yes I totally agree, have to remove air cleaner / battery compartment to get a better view.