The symptoms I had on my 2003 JTS were as described in the original post. A slight judder/hiccup, a few seconds of flashing mcsf/beep-beep-beep, then return to normal with the mcsf light extinguished. The diagnostic software then showed me a stored (or "pending") error code. I can't remember which code, but it was one of the generic ones (ie not Alfa-specific), and the software told me it was a cylinder misfire.
I could delete the code using the diagnostic software (digimoto and proscan were the ones I found most intuitive), but after a few journeys the misfire and error would re-occur. The misfire seemed only to be intermittent, since it did not cause a "permanent" fault leaving the engine management light on permanently.
It took me a few months of trial and error (maf, battery) and reading this site to get me to pluck up my courage to shell out for the code reader, but now I have done it, I feel much happier about understanding what is happening with my car. All thanks to the guys and girls on this site!
Yeah that is exactly what is happening to me FurryMan
. The elm327 should be here next week (coming from Hong Kong, only cost £24 including delivery
I just wish I had done that first as I have already done the following.
Changed front two Lambda's (5 wire ones)
Changed MAF (with cheap useless eBay one - don’t do this it is a false economy!!!)
Cleaned original MAF and connector. ( did improve things a lot I would say this was a massive improvement but not fully fixed)
Ordered the ELM327.
I also had to clean out the area around the spark plugs, as it was totally flooded with oil.
So it could be that I just needed to clean the MAF, clean the oil around the spark plugs and get the error code reader. Hopefully the code reader will ID if there is a misfire and I just need to change a coil pack or plugs.
I think I may have had a couple of issues. Cleaning the MAF was defiantly a massive improvement – everyone should try this first, it is the cheapest thing to do and seems very common! The battery and lambda’s – who knows I wont be reversing the process to see if they helped or not. But there is still the odd judder and MCSF – so the elm327 will hopefully ID the last issue
I'll post again when I get the code reader results.
I think it would be a good ideal to have a sticky listing all the main causes of the issue. It seems to happen all the time. Also a list of known error codes that the readers produce would be of great benefit to people.
Oh I take it the Coil packs are the things that sit on top of the spark plugs?