AndrewJB's Mk2 Leon FR 2.0 16V TDI "Der Rote Baron"

[AndrewJB]

Nope they only put out about 250lb.ft standard and my Flywheel is knackered an probaby has been knackered since i bought it

Shame the old owner didnt realise or i didnt realise until i had the DPF done or else i would of taken it back to dealers and said i want a new fly

When i can afford a New Paddle Clutch and SMF i will then get the Map tweaked again and hopefully push closer to 400lb.ft

 

[Ibiza 130 tdi]

Nope they only put out about 250lb.ft standard and my Flywheel is knackered an probaby has been knackered since i bought it

Shame the old owner didnt realise or i didnt realise until i had the DPF done or else i would of taken it back to dealers and said i want a new fly

When i can afford a New Paddle Clutch and SMF i will then get the Map tweaked again and hopefully push closer to 400lb.ft

Paddle clutch will be horrible for a daily driver. Very bitey/snatchy. And no one will want to buy the car after you. Think of trying to parrallel park with on/off power. Not easy!

 

[Georgel]

Nope they only put out about 250lb.ft standard and my Flywheel is knackered an probaby has been knackered since i bought it

Shame the old owner didnt realise or i didnt realise until i had the DPF done or else i would of taken it back to dealers and said i want a new fly

When i can afford a New Paddle Clutch and SMF i will then get the Map tweaked again and hopefully push closer to 400lb.ft

Ok, the clutch explains it. Mine had way more torque than yours standard. Tbh it made 185bhp standard as well.

 

[AndrewJB]

Good point about the clutch i dont do a great deal of Parrallel Parking and mainly only do Motorway miles now but i bet in a traffic jam a Paddle clutch will be a right pain i will look at the alternatives


At the end of the day BHP Figures are just numbers all as im bothered about now is the car is completely different to when it had the DPF on and if i can sort out this "Stuttering" its got with Clutch,Flywheel and EGR Delete and squeeze some more lb.ft and a few more horses i will be happy with it.Until stage 3+ comes then i will be going in that direction

 

[Georgel]

Well mine has been remapped and has the DPF and it also stutters!? Is it the crappy ECU do you think? I was hoping removing the DPF would get rid of the judder...

 

[AndrewJB]

Nope originally it was thought to be due to a Sticky EGR but now its more likely to be the Flywheel! i can hear mine making a grumbling noise in low rpm's all the time now

So if yours is doing it aswell its likely to be the same Problem!

Even if after fitting New Clutch and Flywheel and the EGR Delete it still isnt solved ive still got me car ready for stage 3.It seems to be a common problem with PD170 & PD140 cars

 

[Georgel]

Does yours stutter all the time? Sometimes mine does it after an upshift. Other times it will do it as I accelerate in gear, it feels like I am coming on and off the throttle. On other occasions it does it after I have been cruising at speed on the motorway. I go to acelerate after I have slowed and it does it. It doesn't do it all the time though?

In fact everytime I take it to the main dealer it doesn't bloody do it!

 

[AndrewJB]

Mine does it in 1st and 2nd if you try to launch smoothly, When i was planting it on the 1/4 mile it doesnt do it

And then it will occasioanlly do it when trying to accelerate on the motoway in 6th or 5th,if you lift of and then back on it does it fine. If you ease the throttle on gently it also doesn't do it

All as i know is its annoying

 

[Georgel]

Ditto mate. I'm taking mine back to the main dealer again next week.

 

[AndrewJB]

I carnt they will just blame it on the DPF Removal and Remap so no point even trying

Let me know the outcome tho as it might diagnose my problem aswell

 

[wega3k]

The main stutter problem you're both talking about (where you back off the throttle, accelerate again and it clears) NOTHING to do with the flywheel.

Andrew - I've not driven your car, but I've driven mine and other PD170s and I find they're not the easiest car to accelerate away in in 1st and 2nd, particularly when cold. Maybe you have got a flywheel issue too, I don't know, but you certainly have a boost control problem from your descriptions.

I have been out in my car with numerous iterations of maps in the space of a couple of hours, tweaking the boost control and I have felt for myself how it affects the ease with which you can provoke the stutter. I took a punt on replacing the N75, but it made no difference.

I think I'm going to give JBS a call and get them to flash me the "mild" map and see how that goes. If I'm really not happy with the performance of that or it doesn't alleviate the issue and James can't help any further, I'll continue trying to get it solved with another tuner.

 

[AndrewJB]

I agree with what you said about not being the easiest car to drive even in standard form in 1st and 2nd it is hard to get correct

JBS Want to get my car back for 3-4 days to test it but unfortunately finding time to give them my car is rather tricky but im glad somebody is looking out for the solution

I read about you replacing the N75,what you planning to do now then? anything else that could resolve it

 

[wega3k]

I don't know to be honest Andrew. I suspect it's either the VNT mechanism sticking slightly or simply the boost control mapping needs more fine tuning. Maybe the sort of gains we've had are simply right on the limit of this engine / ECU setup? Every tuner I've spoken to hates the Siemens ECU and wishes it were a Bosch. It seems quite a complex / overly clever system. For example, one thing I noticed that's different to earlier PD setups is there's a position sensor on the VNT actuator, so the ECU is receiving feedback in response to N75 activity from that AND the MAP sensor.

 

[wega3k]

I guess using that sensor on the VNT actuator, the ECU auto tunes the boost control on the fly beyond just the lookup values in the map.

 

[AndrewJB]

All of that has kinda gone over my head but yeh the old Bosch Controlled PD units where so easy to tune and this one just seems to have gone wrong

Saying that the WTCC TDI's use the PD170 With obviously a very different set up so the engine itself isnt the problem its the DPF and the ECU

 

[wega3k]

Interesting point. The WTCC cars do have DPFs, but they're race spec, different ceramic, lower backpressure ones, so the regen could be different on them. Would be interesting to know what ECU, injectors and turbo those cars run.

 

[AndrewJB]

yeh there DOW Automotive DPF's IIRC and because them cars are driven hard all the time i would imagine the Regen process doesnt happen than often,I Would imagine they do a manual regen before and after races

So would i if i could find out i would just build my engine to the same spec obviously minus the Gearbox

 

[WeeG]

Well mine has been remapped and has the DPF and it also stutters!? Is it the crappy ECU do you think? I was hoping removing the DPF would get rid of the judder...

Georgel, bud generally cars mapped with the DPF had hesitant problems due to the restriction of the DPF itself so yours may be different.

 

[Georgel]

One thing I would say is the level tune isn't the issue. After all mine is only running around 205bhp and 335ftlb. We all have a similar fault, DPF or not.

 

[WeeG]

One thing I would say is the level tune isn't the issue. After all mine is only running around 205bhp and 335ftlb. We all have a similar fault, DPF or not.

I understand what your saying mate, but trust me from someone having stage 1 and 2. Your issue is widely recognised as was mine at stage 1, the extra boost requested effects the dpf's operation on load, causing a feeling as if the boost has dropped and then back on again, the dpf delete stutter issue is a slightly different feeling usually accompanied with load on high gears at low rpm.