Yes...Another Judder

[JamJay]

Hey all.

Over the past months I have read a few threads about LCR owners with "judders" when driving. However, none of them seemed to be what I was experiencing.

Basically, when I am accelerating in 5th or 6th gear, just cruising around and not looking to pick up any real speed, the car kind of splutters for a second and then carries on as normal.

The revs at this point are always between 1600rpm & 2000rpm so I am not sure it is a sign of the car struggling because it doesn't happen in gears 1 - 4 that I have noticed. It can happen either while I am accelerting or just after I let off the gas when I have reached the speed I want.

This is an intermitant fault & I have tried to MAKE it happen on a few occasions by putting my foot down at low revs in 6th but I can't, it just does it when it wants to.

Other than that, the car works fine and when accelerating hard, no issues at all and pulls very very well.

Could this be the common coil pack failure or is something, a little more/less major underlying there?

Can anyone help?

 

[james walker]

sounds like a miss fire to me, try get it on vagcom to see if any cylinders are missfiring

also could be the maf, unplug it drive a short while and see if it improves, if it does then its the maf.

could have a leak somewhere also.

what fuel do yyou run?

have you any fault codes?

 

[JamJay]

I took it back to the dealer a few months back and they told me that they couldn't find any faults on it. However, I don't trust Stealers much but I don't know anyone that could check my car on VagCom .

Could it be spark plugs at all? Although it had a major service at 20,400 miles when I bought it a year ago.

The thing is, with unplugging that MAF, I might not notice any change because the judder/misfire is very intermitant, can go weeks without doing it.

I run the car on V-Power but that has only been for the past two months or less (I got promoted so can now afford it ).

Do you know where I can get that special socket for removing the MAF screws and what size I need?

What will taking the MAF off do to the car, engine mgmt light? If so, will it go out once plugged back in?

I have heard about people cleaning their MAF', how do I do that?

I am planning a remap by Custom Code soon, the dealer has told me that they will do VagCom for free for me but should I be remapping while I have this strange problem?

 

[james walker]

theres a thread on maf cleaning on her, be careful though its very sensitive and might end up shagging it completely.

when you map it they will do a diagnostics check before they map it.

maf will be ok disconnected for a short while. not long though.

more likely to be coils than plugs if youve had them changed, unless there not in/torqued up properly.

try retorqueing the plugs to the correct torque...

check all hoses for leaks, mapper will pickup on this though.

if dealer will vagcom for free then take it back to them to have a look, they should be able to diagnose. custom code will sort this for you though before they map it tbh

 

[JamJay]

Thanks James, I will get the plugs out this week and clean them also. I will leave the MAF thing alone for now and as far as I can tell, there is no apparent boost leak, the car flies IMO and seems no slower than a friends 225 (mine is 210).

I will leave the VagCom for the CC dealer in a couple of weeks but at the same time as the remap, i'll be replacing the DV to a 007 and also te TIP. From what I have read, they are the most common places to leak? Or should I be looking elsewhere for a possible leak?

 

[james walker]

tip doenst leak tbh, just collapses under higher boost.
007 will make a huge difference especially with the map.

make sur you torque the plugs back up correctly, this could be the reason mate

 

[james walker]

torque settings here

http://www.seatcupra.net/forums/showthread.php?t=136595&highlight=spark+plug+torque+setting

 

[JamJay]

Reading that, could it be possible that my car is running on the wrong type of plug? There is mention of plugs being "too cold" although I am not sure what that means. Could the gaps on the electrodes affect anything like I am experiencing?

Thanks for the link

 

[james walker]

could be, what plugs are in yours?

change plugs then while you have them out, to correct rating, wont hurt anything,

 

[JamJay]

I am not sure at the moment, i'll know more when I whip them out on the weekend. Thing is, I don't trust a Stealer to do their job properly, I've only ever had trouble with them.

Are LCR's partial to any plug in particular? I assume the gaps will be preset so no need to adjust, just screw them in?

 

[GeePee]

Hi
If your getting a custom code then I'd let them sort it at the same time.

Just had my re-map today and they run a diagnostics and give it a good look over for free, although I had cam belt and other bits done too so got a few freebies! They picked up a temp sensor fault and few other minor probs and sorted it there and then. Plugs they recommended and fitted were NGK PFR6Q

Awesom by the way...really smooth job. To be trusted for sure

 

[JamJay]

Thanks GeePee. Hoping for another sunny day tomorrow to change them.