rattle and management light

L

lee1

Guest
Hi,
I have just bought my a2 1.6FSI.It is a 02 model. I am really happy with it but have 2 questions.Firstly just realised engine management light stays on (it doesnt flash just stays illuminated)although car seems to be running fine.Is it meant to stay on?
Second...When i rev the car there is a rattle (from under the bonnet) as the revs drop off.This is standstill or on the move,but only as revs are falling and if i accelerate it goes.Makes me think somethings vibrating.Any ideas?
Id appreciate any help.Will help me sleep tonite...Thanx
 
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Me too - 1.6 FSI engine gremlins

Hi there,
Me too, - am a recent owner of a 1.6 FSI Sport and now have engine management light on permanently, have spotted it flashing at one point. Garage say it's a misfire on Cyl 3 & 4 and could do with new plugs and possibly coils - Anybody else had this problem ?? Engine doesn't seem to pull in the right way.
Slightly confused.
Cheers
:confused:
 
Hi. Have an '04 53 1.6FSI. About 1 month ago (just after a Service) light on & Coil pack 4 diagnosed as misfiring - car running fine & no suggestion of misfire - plugs replaced during service. Changed immediately for non genuine coil (as no genuine ones available) & code cleared. Good Friday light back on & diagnosis this time is misfire on cylinders 1, 2 & 4!!! - Car running fine & no suggestion of misfire. All 3 coils replaced (4 under warranty), light reset. Drove off garage forecourt & got into 3rd gear & light back on. Back to garage & diagnosis was misfire on 1,2 & 4!!!

Sorry boys I don't believe you.

Off elsewhere for scan to check out condition of Cat & Oxy sensors in exhaust, also for ECU checkout, before returning to original lot for refund on 3unnecessary coil packs.

They claim that originals are on back order (whether or not this is true I don't know), but I dont think these lads are using the diagnostic tools they have with any effect. Its too easy to keep dishing out components & raking in the cash.
I'll let you know how I get on.
DC
 
Engine management light on can mean many possible 'faults' - some important some not so.

My Skodas (1.8 petrol Turbos) often had it on (for months at a time with no ill effect). If you had a coil pack go you would know all about it - the car would run like a 'pig'.

For your own piece of mind you can get it checked out - but better to find an independent with a code reader (or a member with the relevant software) - rather than a dealer who will probably use it as an opportunity to replace anything vaguely justifyable!!
 
Hi Boys.
I've found it & I told you this wasn't a coil pack. I got some excellent 'no bull****' sense from GN motors in Heckmondwike (01924 408621) regarding the diagnoses I had been given (via York Audi & a certain independent VW/Audi 'specialist' in Leeds - wont say who, but I'm sure you'll know 'em).
I managed to trace it to a small air leak on the seal between the cam cover and the plastic boss that the oil filler cap screws onto. This leak was causing a lean misfire (undetectable when driving - but the ECU could see it). The clue came when GN reset all the ECU adaptive control parameters & the fault went away for a week, but eventually came back. During that week when all was fine & my car was running off its map & 'learning' its adaption values again, my fuel consumption went from a previous regular 45mpg to a best of nearly 60!! (on a 1.6FSI remember).
Doing a bit of rooting around, I pulled the oil filler cap & boss off & noticed it felt a bit loose, saw some oil staining on the cam cover outside where the seal sits & thought 'That aint right'.
I tensioned the spring lugs up on the boss & fitted a new seal & the management light went off after 50 yards & aint been back on for nearly 3 weeks now. So I make that DC-1: Audi-Nil. Audi coil packs £120 per set; Oil seal £1.43. You choose!

By the way, the independent 'specialist' in Leeds 'got his coil packs back' & I got my money back - I was happy; he wasn't - if he had put some effort into his diagnostics (actually lifting the bonnet would have been a good start) he might still have a customer. Specialists 'My Arse'
 
Do you know what code this fault threw up? - my 1.4 petrol has a similar reappearing engine light - which was reset by the dealer for £120 and then came on three days later to no apparent ill effect on the runnning
 
Suggest you demand your £120 back or a free permanent fix.

Re-setting the ecu takes about 2 minutes and it sounds like that is all they did!
 
I believe TT's had a similar problem with misfiring due to the coil packs actually being pushed up off the plugs due to the rubber seals on the coil packs trapping air which then expanded when the engine heats up(Serious/no joke).

This has been remedied by some of the owners by cutting a small Vee(1-2mm) in the rubber seals down the length of the coil-pack to allow the trapped air to vent.

Maybe give this a try and see what happens.
 
Misfiring car shuddering and no power

Hi all

I am a new A2 owner and at first i started my experience off on a bad note.

Drove away from the dealer i bought it from and the engine light came on and the car started shudddering and i thought "gosh what now" Lucky enough there was a Kwik-Fit around the corner so i took it in and asked to diagnose the issue and it came back with "Misfire on Cyclinder 1 " So they automatically thought that its the Coil Packs. So i got them changed even thou it was only a misfire on cyclinder 1 i replaced all four as thats the norm to change all four. after they changed the Coil Packs the engine light still came on , which means that it is not the coil packs and can be deeper.

They had a look at the injectors and they were fine. At this stage the mechanic didnt want to go any furthur so i took it to a mate. After a mintues he did a compression test on all cyclinders and cyclinder 1 weas 14.5 and the other three were 16.8 which is not bad but could diffently cause the misfire issue. so he tooke the head off and replaced 4 valves which were very eroded (Burnt Valves) . I know have the car back in i couldnt be happy No more misfiring and the car goes very well.

I can now enjoy the car hopefully without any furthur issues. I just thought i would let you all know of my cure after experiencing an issue with misfire.

So i would recommend only change the Coil that is showing Misfire if it is that then get all four replaced cuts out unnecassary spending and always do a compression test to see if its a engine error if not then it would be either Coil pack harness, injectors, Coil pack, plugs.
A2 1.4 SE
:D
 
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Hi ryanbez, welcome to the A2oc.
Thanks for the very informative first post

Cheers Spike
 
Hi,
Just reading Lee1's original post and was wondering if all this chat about coil packs/misfiring etc cured the rattle when the revs dropped off????? I have been experiencing this rattle for a while now and it is getting slowly but surly louder. I took it to the "experts" at lomond Audi over a year ago who suggested it was loose baffles and didn't merit the work but I don't trust them after charging my friend nearly £3000 and they still didn't fix his misfiring problem.

On another post it was mentioned that the EGR valve could be the culprit behind this rattle?? I'm just worried after reading this thread that my warning lights will start going off and the rattle is a precurser to very bad engine troubles!

So basically did any of those repairs mentioned above solve the rattle???

Cheers,
Muzzaa72
 
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