S54 Engine Hesitation from Idle & Constant Throttle Input

[Spaniarduk]

Before changing the part, I would try the reset steps:
https://youtu.be/5ptZuIIVBfQ

Seemed to help my 2.0.

Oh! Worth a try because it's free if nothing else

 

[Papa_Zee]

Before changing the part, I would try the reset steps:
https://youtu.be/5ptZuIIVBfQ

Seemed to help my 2.0.

Oh! Worth a try because it's free if nothing else

Absolutely!

 

[Muckinonthesofa]

Before changing the part, I would try the reset steps:
https://youtu.be/5ptZuIIVBfQ

Seemed to help my 2.0.

Oh! Worth a try because it's free if nothing else

Cheers. I haven't got any issues as described but it seems a common fault so I thought the sake of £50 I'd replace it.

Having said that, I just did the s54 version of the throttle reset and I can feel that the response is better. Worth doing I reckon

 

[Simon 3.2M]

These cars have 3 TPS's by the way; one at the front of the engine, one under the intake manifold and the last in the throttle pedal.

Do you have a part number for the throttle pedal one mate - I'm assuming you replace the whole assembly?

 

[DevonPaul]

Before changing the part, I would try the reset steps:
https://youtu.be/5ptZuIIVBfQ

Seemed to help my 2.0.

That youtube link has a different procedure to the on I've used..

http://www.z4-forum.com/forum/viewtopic.php?f=32&t=195&p=340346&hilit=throttle+reset#p2221

The Youtube one looks like it might be for learning full throttle at the pedal sensor.

Incidentally - I ordered the engine top front sensor for £47 on Weds evening, arrived Friday morning on free 3-5 day delivery, and installed on Saturday in under 10 mins, which included ar5ing about trying to get a screwdriver that fitted between the unit and the mount plate conveniently blocking access. Fortunately I have a 1/4 inch socket set with a bit holder.

There is an improvement - the initial throttle is more progressive at small openings, which suggests the unit might have had some wear on it (though it looked fine). Before if trying to get out of a sideroad quickly there was a slight pause then it would rev higher than you wanted, meaning you tended to lift slightly then sometimes it bogged down, then a bang as the power came in. Now that is much better.

Even the wife seemed to notice it driving back last night in her work shoes

Paul

 

[Papa_Zee]

Before changing the part, I would try the reset steps:
https://youtu.be/5ptZuIIVBfQ

Seemed to help my 2.0.

That youtube link has a different procedure to the on I've used..

http://www.z4-forum.com/forum/viewtopic.php?f=32&t=195&p=340346&hilit=throttle+reset#p2221

The Youtube one looks like it might be for learning full throttle at the pedal sensor.

Incidentally - I ordered the engine top front sensor for £47 on Weds evening, arrived Friday morning on free 3-5 day delivery, and installed on Saturday in under 10 mins, which included ar5ing about trying to get a screwdriver that fitted between the unit and the mount plate conveniently blocking access. Fortunately I have a 1/4 inch socket set with a bit holder.

There is an improvement - the initial throttle is more progressive at small openings, which suggests the unit might have had some wear on it (though it looked fine). Before if trying to get out of a sideroad quickly there was a slight pause then it would rev higher than you wanted, meaning you tended to lift slightly then sometimes it bogged down, then a bang as the power came in. Now that is much better.

Even the wife seemed to notice it driving back last night in her work shoes

Paul

Thanks. You might have a point there especially as you Did notice the change. I plan to chabge at least the accessible TPS at rhe front. Where did you get yours from, DevonPaul?

 

[Tcochrane92]

[ref]Tcochrane92[/ref], excellent news! I feel tempted to spend the 50quid and replace it in mine. I have some hesitation between 2300 and 2800rpm and half throttle. Precisely the rev range where you cruise along.
I'm also planning on doing the valve clearance check in the spring, which I feel it's due at 30k miles.

Keep us posted!

Drove the car again this morning and it feels 100% better. Night and day difference really.
For the sake of 50 quid and 5 mins labour it's well worth it!

Have you got the part number, I'm thinking of getting it done as part of my next service?

No I don't, sorry. It's the one in the link from carparts4less

 

[Muckinonthesofa]

I forgot to update this thread. Anyone planning on replacing the TPS be aware the screws holding it on appear to be made of putty! Be careful you don't strip them, I couldn't loosen the bottom one so before I stripped the head completely I cut a slot in it with a hacksaw, used slotted screw bit and a it loosened straight away.

 

[philipw]

The OE manufacturer for the sensors is Hella, Part no. 6PX 008 476-271

I purchased the sensors (x2) from the following website.

https://www.mitcrcmall.com/hella-6px-008-476271-sensor-drosselklappenstellung-anschlussanzahl-3-hella-kgaa-hueck-co-008476271-p-29264.html

Price for both sensors was €46.60 using the 10% off code when paying with MasterCard.