Judging from this error code and the imtermittent symptoms, I guess this is a dirty MAF.
Can anyone please confirm this, and also which side the MAF for Cyl#5-8 is - whether it is the LHS or the RHS - when looking at the vehicle from the front?
Is it adviseable to change one MAF or both - my 3rd party warranty company (RAC) have approved only one, so I need to pinpoint which one it is.
Now there maybe a situation where the O2 is failing; two codes for the price of one...and as the result the fuel is being adapted incorrectly...... a simply scan on the GT1 will answer this question.
Take care
Shadowman
Quote:
Originally Posted by Whizzkid11
Guys,
I have used my Peake Research tool and have an error: 18 0C 91
Judging from this error code and the imtermittent symptoms, I guess this is a dirty MAF.
Can anyone please confirm this, and also which side the MAF for Cyl#5-8 is - whether it is the LHS or the RHS - when looking at the vehicle from the front?
Is it adviseable to change one MAF or both - my 3rd party warranty company (RAC) have approved only one, so I need to pinpoint which one it is.
Now there maybe a situation where the O2 is failing; two codes for the price of one...and as the result the fuel is being adapted incorrectly...... a simply scan on the GT1 will answer this question.
Take care
Shadowman
Thanks Shadowman...
Silly question.. Drivers side (RHD) or (LHD) ? - sorry I had to ask I am in the UK with a RHD.
Also is it worth swapping out both? or is a single sufficient - under normal/best practices.
Sorry..... with the hood/bonnet open and you are staring at the motor it will be your right side......
I would not replace either until I placed the GT1 or ?? INPA on her to confirm....then only replace as required.... there are electrical and sometime they simply act up.
Shadowman
Quote:
Originally Posted by Whizzkid11
Thanks Shadowman...
Silly question.. Drivers side (RHD) or (LHD) ? - sorry I had to ask I am in the UK with a RHD.
Also is it worth swapping out both? or is a single sufficient - under normal/best practices.
Sorry..... with the hood/bonnet open and you are staring at the motor it will be your right side......
I would not replace either until I placed the GT1 or ?? INPA on her to confirm....then only replace as required.... there are electrical and sometime they simply act up.
Shadowman
Cool - Thanks a lot!
rgds
Was!
PS - the MAFs are now 66K miles old - so prob due a clean as well...
Getting a GT1 on would be near on $300 from BMW - and I have had it checked using another software package - and that pointed towards the MAF as well...
WOW they are pretty proud of that unit...$300.00 just to look at the system condition......
At 60k plus they are worth looking at..... my experience cleaning them has been mixed........ lately I replaced one.....attempted to clean two.... the cleaning process seemed to have failed this last time.......... worked great for a day......and then they gave fits......
Have fun
Shadowman
Quote:
Originally Posted by Whizzkid11
Cool - Thanks a lot!
rgds
Was!
PS - the MAFs are now 66K miles old - so prob due a clean as well...
Getting a GT1 on would be near on $300 from BMW - and I have had it checked using another software package - and that pointed towards the MAF as well...
I had the 'Fuel control' and a whole host of 'misfires' on various cylinders, and replacing both MAF meters sorted the problem, havent had a misfire in about 3months despite continuous hard driving etc.
Cleaning them never produced 100% results and there was always an element of 'chance' in the back of your mind during those critical overtaking manoeuvrers that this sporadic limp-home mode would rear its ugly head.
I had the 'Fuel control' and a whole host of 'misfires' on various cylinders, and replacing both MAF meters sorted the problem, havent had a misfire in about 3months despite continuous hard driving etc.
Cleaning them never produced 100% results and there was always an element of 'chance' in the back of your mind during those critical overtaking manoeuvrers that this sporadic limp-home mode would rear its ugly head.
Where these misfires around without the engine amanagement light popping up?
I ask because, I the light comes on intermittenlty - will go off and come back on whenever i floor it onto a motorway... was wondering because I have noticed a slight degradation in performance - but not into "Limp mode" at any stage.
Havent had any engine management lights shown, but did notice (what felt like) about 50bhp extra with the new MAF units. The engine was rather growly and rough sounding about mid-range beforehand, and feels more punchy and a lot smoother now.
Ideally, you should try another UK members meters (2-minute transfer job) beforehand just to be sure.
Now there maybe a situation where the O2 is failing; two codes for the price of one...and as the result the fuel is being adapted incorrectly...... a simply scan on the GT1 will answer this question.
Take care
Shadowman
So #1-4 is actually on the passenger side (left side when looking at the engine from the front)? Wow, for some reason I thought it was the opposite, based on instinct. You'd think the driver's side (non-UK) would be banks 1-4 and passenger's would be 5-8. Anyway, I got the Pre-cat O2 sensor error with a catalyst efficiency error for banks cylinders 1-4. I'm thinking of just changing out the pre-cat O2 sensor and seeing if it goes away.
Linear Mode
