Stuttering and Lumpy LCR

[Paul Rushton]

Hi

I have a 2003 52 reg LCR. Last serviced at 40k now at 47k. It has always had a problem when driving on light throttle and gentle accelaration of stuttering, almost like a misfire. When the car was in warrantl it went back numerous time and they replaced the boost pressure solenoid??? twice and the MAF sensor. Still to no joy. I know it isn't spark plugs as these were changed at the 40k service and it did it before. I have been doing a bit fo reading and could the DV cause this and would it be worth upgrading? If i can.

Any help would be great as most of the times the problems there but sometimes it worse then others.

I have been told the possibilty of an air leak but how the hell do you check thAT T

Thanks
Paul

 

[Rivva]

Hi mate, hope you solve the problem, ive had this ever since getting Revo'd (remap) which has been for around a year and a half, it also does this in standard form now, i have ......

Changed DV to forge 007p, twice.. tried green and yellow spring
Changed N249 Valve
Changed N75F Valve
Changed MAF
Changed intercooler hoses + TIP to samco hoses
Changed Vaccum hoses for DV
Changed Spark Plugs
Changed Airbox for Induction kit

And probably alot more things.. but still i havn't solved the problem, dealers couldnt find out what it is either! Sorry to sound negative but most people solve there issue with at least one of those things above, hope you find out what it is...

John

 

[PlatinumR]

maybe give the throttle body valve a clean???

 

[Rivva]

This was next on my list actually, what is involved is it best to take it to a dealer? the last time it was in at the dealers they said they did something to the throttlebody not exactley sure what though

John

 

[Rob225C]

I think this is whats happening to mine, first thing in the morning, i pull away, it stutters like the turbo doesnt want to kick in, and just loses power, then picks up. is that what yours does???
I just thought turbo being cold. but do i have a problem?

 

[traumapat]

is this happening as the engine warms up? i suffered the same but replaced the engine coolant sensor and its now much better.

have these issues been logged on vag com?

 

[Mikonood]

Sounds the same

Hi, I have 2002 52 plate 180bhp bog standard LC with 63k on the clock which has been doing the same for about 6 months.
Only on very light throttle tho and seems to come and go.

Had full service at 60k and mentioned it to garage who had a good look but couldnt spot anything, no fault codes etc. Seems to be a live with it kinda problem.

Let me know if you get anywhere.

Cheers,

Miko.

 

[Spanky]

Hi, I have 2002 52 plate 180bhp bog standard LCR.....

LCR... do you mean LC..?

 

[Mikonood]

Ooops, yes i do mean LC, just aspier to an LCR!!

 

[Paul Rushton]

I have been reading up and not sure if you can diagnose air leaks with vag com. I do not know what sort of cable is required or where i can get it or the software. Can anyone help or in hudderfield area.

I have replaced the engine coolant sensor in the expansion tank which didn't solve the problem!

Any more ideas keep them coming lol

 

[h100vw]

Paul, you might get a hint form VAG-COM that there is a leak. It won't tell you where from though. Had one on a remapped Cupra. VAG-COM kept snagging the DV(forge) so I ignored that advice.

It assumes that all your vacuum hoses and boost hoses are done up tight. Mine only did it on high boost, if I dropped it using Custom Codes custom settings utility to 70% it ran perfectly all the time. Evetually. I think I found a loose clip on a boost hose but as someone was coming to buy the car I never got to test it out.

Also, it seemed to be worse from cold. Once warmed up it would run great at full boost.

Gavin

 

[jetsetjimbo]

Hi, I have 2002 52 plate 180bhp bog standard LC with 63k on the clock which has been doing the same for about 6 months.
Only on very light throttle tho and seems to come and go.

Had full service at 60k and mentioned it to garage who had a good look but couldnt spot anything, no fault codes etc. Seems to be a live with it kinda problem.

Let me know if you get anywhere.

Cheers,

Miko.

I have this very same thing. Only on light / part throttle.

Did anyone get any where with this? I've found that doing an ECU reset (battery disconnect) seemed to clear it up for a week or so.

I'm having problems capturing the symptoms on Vag-Com logs but am thinking from something I saw the other day it could be an issue with the N75 holding the waste gate open when the turbo first kicks in or something.

Also there's the possibility that cleaning the throttle body may help? This is one of the things on my list to try next.

Has anyone tried the ECU reset and seen if it has had any effect?

 

[traumapat]

ok.... my cars at jabbasport and has had its ecu swopped, they have also changed maf and lambda and cleaned, reset the tb. to no avail.

apparently this is common and they rekon after running for a min or so restart the car and it should have gone. so its all pointing to cold start cycle problems.

i might change my n75 just so ive tried everything... but im doubtful.

anyone know much about whats different when starting from cold as opposed to warm? i know theres extra fuel going in to warm up the system but thats it

 

[jetsetjimbo]

I take it you suffer this only when the engine is cold?

Paul & Rivva - Did you try the throttle body clean?

 

[traumapat]

I take it you suffer this only when the engine is cold?

Paul & Rivva - Did you try the throttle body clean?

yep seems to settle once warmed up. i get the odd bit of hesitation but this is mainly a cold start problem in my case.

 

[jetsetjimbo]

traumapat - Did Jabba get anywhere with the surging?

 

[traumapat]

traumapat - Did Jabba get anywhere with the surging?

they still have the car but they cant seem to fathom it, they say its common and best to run the car at idle a while and then restart to get it past the cold start cycle.... mine seems to settle after that. yours?

my car has a different ecu and map now and i`ll let you know how she is when shes back. (300bhp+ i hope)

i wonder if other 1.8t forums report similar? ive got vag com now and im going to run monthly tests to see if anything becomes amiss.

i cant help feeling that its the temp sensor even tho ive changed it. i wonder if mapped cars are too much for the standard sensor?

 

[bluepassion]

me too

mine does this too and everyone has drawn a blank with it,skoda octavia vrs,it does it with or with out the map

 

[spikeydoo]

Std LCR & mine does this too, only when cold tho, once worm runs sweet - good info people I'll try ecu reset & c wot happens, Thanks!

 

[Riddick_m3]

my lcr does this too, anyone tried a throttle body reset? i might try today as im detailing under the bonnet, ill let you know my findings