A comment by Terfyn prompted this post.

I find that my CR140 TDI 4x4 ticks over around 800 rpm.

It really isn’t happy if when driving you allow the revs to drop below about 1200.

If it gets below a 1000 then it will quite likely stall and I have stalled it a few times..

I’ll get used to it of course and know most diesels are a bit funny over low revs but wondered if it’s because it’s a 4x4 and the extra load makes it more susceptible to stalling.

:|

My old PD140 octy would allow you to lift up the clutch at idle in first gear and the car would pull away quiet happily at 800 RPM with no throttle input at all. My current superb DSG seems quiet happy below 1K RPM.

What miles have you done?

New engines stall much easier than a fully run in engine.

tom

I think the low torque at low RPM from the new CR engines is the reason for your near stalling . You have to change your driving style to suit the new engine characteristics i.e. drive it more like a petrol engine.

I agree with mannyo's comments . I could drive my old MK4 Golf without any throttle in 1st,2nd & 3rd gear in traffic queues . When the 1st PD VW tdi's came out , a road test journalist reported he drove 3 miles to his local paper shop using 1st 4 gears without touching the throttle !

Edited 24 April, 201016 yr by vwcabriolet1971

I think that the flywheel and crank are quite light causing the lower torque at low revs. With care, the car will coast in first gear at 800 rpm but if it does not have the revs at start up it may stall. i have got used to it now but it does occasionally catch me out!!

The lower torque at low RPM of the CR engine series is as a result of the engine design and fuel map programming . The main objective was to reduce emissions. The CR engines are 4 valve / Cylinder and develop their power higher up the rev range than the old 2 valve PD engines .

I noticed the 140 bhp diesel I test drove stalled very easily. The sales guy stalled it and so did I on test drive. Its a characteristic of the engine I think....seems very 'light' if thats the right word.

Thanks Guys

that’s interesting.

My old 1.9PD Seat used to drive along in the lower gears without any throttle just on tickover as others have noticed.

So the new CR engine is designed differently.

Drove to Lichfield today from Wirral (no speeding) and got 45mpg going and 49mpg coming back so happy that engine is running OK.

Only stalled it once!

Its only done 1000 miles so by the time I get to 20k it should be run in.

Although I have a theory that diesels run the driver in rather than the other way round.

Cheers,

If it's of any value, my monster has now completed 4500 miles. I used to stall mine daily. I would normaly stall the engine while on the approach to a junction, using the engine over run in 2nd gear, to reduce vehicle speed.

Now I stall it once a week. I have nearly trained myself out of it now.

I think its mainly a problem for those who have previous recent experience of driving the PD engines such as in the Golf or my old Octavia.

It can be a bit of a pain but seems no worse than for any petrol engined car.

My Yeti has done just over 6,000 miles and does seem to be loosening up a little now and the problem is reducing. That is unless I have just jumped out of my wife's 1.9 PD Roomster.