SL65MONSTA

I just got the my 2004 SL65 tuned I wont say which company at this stage until I get to see the customer support and feedback in rectifying this issue, but since I uploaded the tune today the car seem as if it its choking , or the exhausts are blocked. Has the tuner done something wrong or does my cars cats need to be removed for the extra power being generated ? The tuner is in the US I am in Australia , does this have any effect in terms of the tuning specs for different countries ?

Scared to drive the car I might blow the engine or do damage

Any input much appreciated guys

blackbenzz

If the car didn't do it prior to tune and started immediately after loading the file its most likely the tune

BlownV8

Who is the tuner?

euphoriaDSM

Does it crank and idle normal and only bog at WOT? If so then your coil packs are the problem. 100% of the time after a tune, even a flash one like you have, the coils and plugs go out. Mine did the exact same thing literally the same day I had the tune done.

SL65MONSTA

yes this happened in that sequence

SL65MONSTA

please read the original post, at this stage I dont want to bad mouth them until they try to rectify my issues

SL65MONSTA

I hope your wrong , what is WOT? it happens intermittently at high throttle if this helps

mcguirja

wot = wide open throttle

SL65MONSTA

i think so I am going to try go back to my original file and see if it still happens. How can a tune cause the coil packs to go ?

oh and in other news today I found this photo (its painful)

JoeNobody

Install a wideband asap. Then you'll know if your engine is safe or not.

sgaar

That is not correct - the 100% part. I have my ECU flashed by Kleemann and haven't had any issues with the plugs or the coilpacks.

euphoriaDSM

Did you replace the coils packs before the tune? My statement was for the guys still running the factory plugs and coils.

SL65MONSTA

I replaced the spark plugs before the tune but car was driving fine. Also running NGK G Power plugs (nothing special)

RaceHorse

Do a search on V12TT coil packs and you will see this has been discussed many times. Probably little bits of info shared in each thread. The original coils were replaced with an updated part and part #. The original coils seemed to fail with the added power and stress from a tune, any tune regardless of the tuner. It seems the updated part has been able to work with an ECU flash. The coils and igintion control module have been known to fail giving similar misfire codes.

Are you the original owner? If not the coils were probably replaced in the past since most of these cars are around 10 yrs old now.

My coils were replaced and factory plugs were installed. No issues for me with tune and mods on the stock plugs. I agree, most likely sgarr has a car with updated coils, checking the part number would confirm.

coldhammer

i had a similar issue a few years ago after a kleeman flash. kleeman swore up and down that there was no way it was related to the tune flash. but they went ahead and reflashed it. sure enough went away and never came back.

SL65MONSTA

What did it turn out to be in the tune they did wrong?

sgaar

No, original packs and plugs.

coldhammer

No idea. I was told all they did was reflash the same tune again. No other changes were made.

I actually found about the issue from a guy down in orlando that was selling kleeman stuff at his shop. He said he had two cars that mysteriously developed the same symptoms and he accidentally stumbled across the solution of having a re-flash performed.

aeroman

I'm not going to say who the tuner is but after my ecu was re-flashed with updated software both coil packs went out within 5 months. The original tune put on at almost zero miles the coil packs lasted about 30K. Just recently, my ECU went bad and was replaced so currently I am running a stock ECU with no tune.

How does one flash the ECU themselves?

I have both ECU and am thinking of having one of my friends that does this kind of thing dump both EPROMs or whatever you call it and compare out of curiosity.

BTW - When I called the tuner even though I am the original owner of the car they told me I would only get a 15% discount on flashing the new ECU again if I wanted it.

sales@eurocharged.com

The ECU tune was done by us.

This car has about 60,000 miles on it with original coil packs.

This is a known issue on these engines and the coils should be professionally replaced.

The tune file provide to the OP has not been changed in years with hundreds of customers running the file with zero issues.

SL65MONSTA

I am praying I am not up for new coils and the tuner can re-flash to make it go again. Are the coils fried ?(unusable) or can the tuner rectify this issue. I have also reflashed to original car file tune, but the car is still pushing misfire codes. Any ideas?

aeroman

Clear the codes. Start car and ensure that check engine light is out and car is idling fine. Get out on road and accelerate under fairly hard acceleration. About 3500-4000 rpm (can't remember) if the coil packs are bad the car will go into limp mode and run rough and check engine light will come back. Codes will return. If this happens one or both coil packs need to be replaced. I would replace both at once unless one is new model. If you just replace one and they are both original you won't make it 3 months before the other fails. If you are slightly handy with a car changing the coil packs are not tough.

aeroman

Tune will not impact a coil pack if it has gone bad. Nothing short of a new pack will.

aeroman

I agree tuning only impacts the original coil pack part numbers. The newer OEM parts do not seem to fall victim to the increased stress.

SL65MONSTA

What I know is that my car was purring like a baby before the tune, as soon as I uploaded the tune , it **** itself not even a minute later, and you sit here tell me its not the tune , that the coil packs are out on there way? I have been driving this car hard for the last year racing every night of the week nearly, never once did my car ever fail me, worste thing was replacing tyres and general tune ups. This damage was done as a result of the tune, Eurocharged has done this to other members cars apparently after doing a search on forums. 4 people on here have complained about exact same symptoms after Eurocharged did there tunes! But you wanna blame the customer ?