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I checked engine oil level today and it was over upper limit and it smelled gas. What could cause this?

If the map is overfuelling it could be washing the boards, the excess petrol will then contaminate your oil making it too thin.

I actually have had this problem before and after remap (stage1->stage3) so I don´t think that´s the reason, of course it´s possible. If this was caused by a mechanical fault where should I be looking at?

Unless your stage 1 remap was also overfuelling?

Yep, overfuelling like cracy! On idle it´s OK but when you raise rpm it just fuel like there´s no tomorrow!

Now the question is WHY? I called to my tuner but he couldn´t really say why it´s overfuelling. I logged blocks 32 and 33 with vag-com and both lambdas correct ~10-15% (+-3%) to leaner on part throttle (at +2000rpm). After maybe a 5 minute normal run "learning lambdas" was correcting ~7% leaner. (sorry my english but hopefully get the point )

I believe it´s bad mapping but is there anything else that could cause that much overfuelling.

PS. I have 630cc injectors, they are quite a large but souldn´t be a problem if tuned right.??

Mikse wrote:PS. I have 630cc injectors, they are quite a large but shouldn´t be a problem if tuned right.??

I think that's your answer right there!

Probably worth getting in touch with Mihnea or Doug at MRC to get a professional opinion.

I would guess maybe the tuner is using a base map for different injectors, hence the overfuelling. I may be wrong...

Just a quick confirmation, The injectors are Siemens Deka 630cc/ml @3bar. So these are generally used injectors on our cars and shouldn´t cause problems with fine tuning the fuel mixture especially at idle and low rpm and low/no boost?

who tuned your car?

best to get a wideband on the car and see what it is doing part throttle and wot.

i would be surprised if you are washing the bores so much as to add fluid to the oil that you can measure - you do get fuel in oil but not 100mls worth!

Doug_S2 wrote:who tuned your car?

best to get a wideband on the car and see what it is doing part throttle and wot.

i would be surprised if you are washing the bores so much as to add fluid to the oil that you can measure - you do get fuel in oil but not 100mls worth!

The car was tuned by a local tuner but apparently didn´t do a very good job. As I said mixture is ok at idle but when reving it the CO raise up to 8!!! (0,06 at idle) And there IS so much fuel in oil that 100ml propably isn´t exaggerated.

And the last but definately NOT the least, tuner refuses to tune the car because the he thinks 630cc is too big so I may have to go back to stage 1 map I had unless I find another tuner.

Doug, I´ve heard that you guys can make custom maps "remotely" at the MRC, could you help me on this. I´d be more than grateful

Mikse wrote:
Doug, I´ve heard that you guys can make custom maps "remotely" at the MRC, could you help me on this. I´d be more than grateful

I would also be extremely interested in this, I would imagine it is possible.

send us an email with your specs

Doug_S2 wrote:send us an email with your specs

btw do you tune foreign car also? I guess it´s the same where the mail comes from..?

Mikse wrote:
And the last but definately NOT the least, tuner refuses to tune the car because the he thinks 630cc is too big so I may have to go back to stage 1 map I had unless I find another tuner.

Mikse, reading this but again, have you fitted the new bigger injectors without having a remap done???

If this is the case then of course they will be overfuelling as they duty cycle will be set too high for these injectors.

Blue_Thunder wrote: Mikse, reading this but again, have you fitted the new bigger injectors without having a remap done???

No, remap is done and the injector size "should" have been compensated but maybe the tuner isn´t quite good with these cars as I thought and now he say the injectors are too big and refuses to tune it right...

Waiting reply from MRC if they are willing to do the map for me.

Keep us informed on the " tune by email" procedure Mikse.