[those of you in a hurry please start below at the ">>" mark]
those busy at the ignition part of this forum know how I struggle to get my Rover V8 (4.2l) with EDIS running. The timing problems I think can be called ok by now, timing is 11deg in no-saw mode which can stay there fore the while.
I thought I could start to tune but not so. Would have been to easy, I guess.
The engine was hard to start, playing with ReqFuel didn´t help. I soon recognized it could be helped into life with flooring the accelerator pedal a little. It then could be kept running, but doing so very very roughly and vibrating badly. At least the new cam could gain some oil at the higher revs.
Time to think again (fears went like "camshaft timing out of phase .. pulling it all to pieces again" and the like) until I thought of removing the spark plugs:
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From the 8 spark plugs 5 were black/coated with carbon and 3 were absolutely clean. The latter are plug 1,3 and 4.
Surely that explained my AFR reading (EGO sits in the right exhaust downpipe, therefore was affected by cylinder 4) jumping and bad running. Meanwhile the engine warmed up and would start readily and shake less badly, but it sounds (especially from the left head) like I had no exhaust installed at all.
I can offer an explanation for that: the injectors had been cleaned and flow tested. The company told me not to do this months before putting them in service because the cleaning fluid might cause them to stick. The injectors have been assembled 3months ago because without doing that I wouldn´t have been able to assemble the engine further and cannot work on it every day, thus it took that long. I took a steel rod and used that to punch the offending injectors with some not too hard hits with a small hammer (that`s what the company adviced me) I´m not sure that helped.
Do you have any idea what else I could do ?
Certainly has to be sorted before doing any tuning.