Evening all had my mk1 fabia vrs nearly 3 years now and over time replaced a few things as you do with general maintenance but there's one particular issue that really annoys me at times and it's the general start stopping around town that Ive been scratching my head for a while now

 

It's just not nice at all to drive other than on a motorway at constant speeds

 

The engine can judder at times more so after a short journey once the cars heat up, fine from cold and fine after a motorway jaunt but get the car up to temp around town and it's almost as though it's misfiring, here's the strange part - turning on the rear heated screen and AC calms it down a lot at idle or until I give it a blast and come to a standstill it's fine

 

When I drive the car Im getting jerks when changing gear, almost like the dogbone mount is non existent, driving in normal traffic and let off the accelerator it's almost as if the engine is kangarooing, stick a load on I.e aircon and rear heated screen and it's as if it drives a bit better but still rubbish, I even need to precisely time when to drop the clutch because it feels like the engine rocks back and forward when disengaging. 

 

I've done a lot of work, gearbox and dogbone mounts, injector loom, timing belt set with vcds, accelerator pedal (high revs which I thought might of contributed to the issue) flywheel, clutch, release bearing, everything genuine, egr delete and programmed out, I even done a liqui moly injector clean by running it straight to the injectors from pipework I made up. 

 

Issue was present before above work, kind of let's me down driving the car especially when I've drove other mk1 fabia vrs's and they drive spot on and probably hasn't had the amount of care and attention I've given mine

 

My only other notable signs of wear on the car is a slight whine from the turbo and slight scoring from the cam which I can only put down to the non Skoda service stamps in the book as I always change every filter every service along with it all being Skoda parts and oil, please pity me and my fabia haha 

sounds a bit like EGR issues. Mine did exactly the same until I deleted it.  I also used the rear glass heater or Air con to stop it.   Have a look at some threads on EGR issues.  Replace, Clean,  Or delete.

 

As for Engine rock, Gotta be engine mounts and points to the Dog bone which is strange as you said you replaced it.  Does sound like the culprit though.

It's been deleted as I said buddy, one of the reasons I done it because Im aware of BLT's and EGR problems 

My bad.  Id just woke.... What did you do with ASV?  Keep or remove it?

No worries lol just hoping someone's maybe had similar issues with theirs, I kept it in place to help with shutdown, as it's standard I wasn't fussed on removing that, only to help with carbon build up 

There is a rubber diaphragm in the ASV that lets go,  Might explain some of your issues on turning off. Could be worth Investigating. 

 

Apart from that someone will be along with pearls of wisdom at some point today with more Ideas.

I don't really have any shutdown issues to be honest but I'll have a look anyway 

Is this one of the engines with the sprague clutch flywheel? If so, then if that's "grabby" it might smooth out with a heavy electrical load.

Never heard of a sprague? 

43 minutes ago, krissyneillie1 said:

Never heard of a sprague? 

AKA a "one-way clutch" or a "slipper clutch". Anyway, the idea is that if it's not picking up and releasing drive smoothly when there's a light electrical load on the alternator it could put jerks back through the auxillary drive belt to the crankshaft.

Ittl be a sachs or luk whatever is listed for the fabia, what your talking about I've never heard of

Ken's on about the alternator pulley.

55 minutes ago, krissyneillie1 said:

Never heard of a sprague? 

 

Sprag.

 

https://en.wikipedia.org/wiki/Sprag_clutch

Edited 24 June, 20179 yr by TMB