3.0 TDI idle speed?

[Mr-C]

Mine is at about 800 rpm, to me it does sound a bit on the fast side. Whats yours? or what should it be?

 

[Steve220]

Is that from cold?

 

[A4_MaJiK]

Seems about right to me...(same as mine).

 

[Mr-C]

Is that from cold?

Same hot or cold

 

[Joe_Murphy21187]

Should drop slightly when the engine has warmed up, maybe 50rpm or so? Mine sits at about 850-900rpm when cold and 775-825rpm when warmed up.

Sounds about right though. I think you can adjust the idle speed on VCDS... but I'm not 100% on that

 

[Mr-C]

Cheers guys, mine must be right then

 

[gupsterg]

Mine on a 3.0 TDi A6 (same engine) can be 1000 rpm when really cold/first start of the day, then gradually drops as car warms...

When warm/not cold outside temps will be around 800rpm...

I think you can adjust the idle speed on VCDS... but I'm not 100% on that

Anyone got info on this please?

 

[A4_MaJiK]

Why would you want to adjust the idle speed anyway (out of curiosity)?

 

[gupsterg]

I have an issue which has got right on my wick! it is an idle hunt/flutter its not just the needle it is the engine... it happens just after crank finish of engine, initially for a moment the engine is smooth then it go nuts!

It has been suggested to me an idle increase at startup may help..

I've DIY done:-

Full set of injectors, MAF, Throttle body, Battery, full service...
EGR inlet into charge air decoked, EGR valve/cooling flap been vacuum tested/MVB 03 done(visual/decoke soon to be done)...

I've had done:-

Full set of chains & tensioners, Tiptronic oil change, Last rev of engine ECU software done...

Soon to be done is Ins.cluster flash to last rev of SW as TPI/TSB suggest bad comms between engine & ins.cluster with SW I currently have (should also give me digi.speedo in DIS ) ...

Sorry OP for hi-jack ... I have no fault codes to go by ... fuel pressure/rail/pump MVB look good as well...

 

[Darren198712]

inlet manifold maybe on a 3.0 ?

 

[Steve220]

Could be manifold flaps or air in the fuel line if its a derv.

 

[gupsterg]

Fuel lines air free... the clear section of fuel line to the HPFP pump is always full and bubble free...
Lower/upper intake manifolds will soon be decoked but no faults checked visually and VCDS test of MVB/actuations...

I will leave posting in this thread now unless someone give info on idle adjustment...

Going to MRC tuning soon to see if they can diagnose anything...

 

[.Jas.]

Mine is at about 800 rpm, to me it does sound a bit on the fast side. Whats yours? or what should it be?

Mine is the same, about 800 RPM, I always thought it seemed a little high but it is the average