Kennyx wrote:The problem now is .. im not sure how reliable and how proper the dwell timing to set on your ignition system...you can tweak it little by little if you have enough free time ... anyway, if you suspect the O2 will disturb your engine operation ..you can always disable the o2 correction before run .. judging from your fuel VE table .. i dont think it is cause by fuel .. i will more focus on the ignition system if i were you .. And i forgot to ask you .. is your exhaust gas looks good ? any blue , black or white smoke comes out from tail pipe when you rev up the engine ?
Hi, the ignition timing was checked many times by stroboscope and I found it OK. I also checked the ignition power by a serial device as well which has an air gap in a gas filled glass chamber and you can put it serial with the sparkplugs, no difference between cylinders, nice blue.
Right now I am am on the same opinion like you: I suspect ignition better than fueling.
My exhaust gas looks not soo good. I have Arias pistons with Totalseal rings but the engine is using some oil, however the rings were properly seated - based on my knowledge, first 2000km I had without oil consumption.
Alfa nord engines are known about they oil consumption. I am fighting with that since I know Alfa Romeo. I had originally Borgo pistons and liners but engine started to use oil. Than I changed to Arias with total seal rings, but after some monts after rebuild engine started to use oil again. I used many brands and viscosity but not helped.
Why I changed to programamble ECU because I wanted a reliable, good system. Than I found MS which is very close to engineering. I think the current oil consumption was caused by incorrect fueling caused by Motronic system what I used together by some pigy back devices I designed but fueling control was not so reliable and precise and under boost I had some oil washed from the walls by overfueling.
So, I have some white smoke under heavy load, sparkplugs look nice - here in Hungary we so call fawn clolored - but when I removed my O2 sensor for calibration I fond some black soot on the sensor and also the wall of the pipe was covered by that. (The endpipe is also black but not shiny.) I use the car mostly (99%) within the city. I think the white smoke is caused by a process that carbons start to burn under heavy load.
Right now I use around 0.8L / 1000km from oil. Engine rebuild planned this summer.
Can the oil consumption cause my issue?