Oh God! I was out a few days and see where the events have led us!
I even meant to notify you guys that i won't reply too fast, I have a lot on my plate and when i can get away from the computer I try really hard not to turn it on. (Even though i wanted to check on the Skoda forum)
Let me go in points trying to keep some timing in answering the posts:
- compression test was done years ago when i got the car. I seem to have lost the photos of that but i thought they were all even. (can't recall the number though)
book is again in the workshop (far away) i do not know the compression values. I think 145psi for a cold engine form the 80-ies with 260k on it is OK...? NR4 stands out and i do not know why. Baffles me!
- spark plugs: Yeah, Ricardo, some truth in that... my impression was when i just pulled Nr4 out that it was wet, but probably from the petrol of it not igniting properly. I focused a lot more on the black/white coloring. Maybe I should have mentioned it, I think i decided at the moment there and then that it was just unburnt fuel. (I had bikes in the past, one was consuming oil, the JAwas were ever going out of ignition timing, so have seen a fair share of plugs) Why i did not say so in post nr1...? Mea Culpa! With the compression suspiciously higher in that cylinder I switched to my oil theory. I mean come on, we all been there, right? Hoping for something simpler than an engine rebuild!
- nta16, I'm hoping for vacuum leaks or whatnot, as that is easier to fix (if not to find) than anything else. More on that later!
- After that the threadwar started, and i'm very sorry for that chaps. Yes, I'm really grateful for getting answers from a Skoda forum on my Saab. I got loads of good knowhow for the Felicia here, and I prefer to ask people I feel that I know. (Of course not, but hey!) I could have gone to a Saab forum but I really think this engine is simple as a brick, so I was not expecting some magical issue with discolouring plugs. Etc.
-nta16, why do you think I'm not answering or taking your advise? If that's the impression, sorry Man, not intentioned. I have many projects, renovating a house, building a Suzuki Savage for a trip that's 3 weeks away and checking the bloody war news daily to know when to grab the backpack and head for the border. Nah, you guys are much faster than I anticipated, and I feel bad about not following and checking every sane idea that comes up.
- J.R. : you can skim this through. The bottom few lines will be more relevant.
(I do that too If I'm in a hurry... And That would support Ricardo's point of being concise and on the point, so that not to waste time, but then, I'm on nta16s opinion a bit, as this is not professional diagnostic workshop, but more like a gathering of likeminded people. At least I'd like to think so... so yeah, lengthy novels as I like to express myself that way, that annoys Ricardo a bit and you skim through. Relax! It's a joke! )
New developments as of yesterday and my thoughts:
- Got new plugs (NGK6BE as per manual) and before i installed them, I adjusted the gaps... and next to the gap spcs there were all kinds of interesting data for the ignition system so I also measured the resistance of the leads and measured the coil. I found that data in the workshop manual and thought why not. And turns out, that the book says much, much less resistance for leads than what I have. My NGK leads were specifically bought for this car, but instead of 3-3.2k per lead I have 7-6k, so double. The Lead from coil to distributor is 4k in my case, should be 1k according to Haynes.
- Checked coil as well, I mean, who knows who fixed this car before, right? Secondary winding should be 24-35k and I have much less... bud damn, I forgot the number... 4k???
- Nevertheless Started the car up. (wanted to test if EGR removal and blanking off does anything)
And it did, Fired up on all 4 cylinders!
Now:
- It's snow here, the Saab has no wheels (rims are getting painted) and it has no technical test. So a testride and plug color check is a no-go at the present moment.
- Ricardo! You mentioned the leak test, and I meant to write to you. I have not done that, can you point to a decent write up of that? Any special tool needed?
- Now that the engine is running I'll do a proper compression test and will post the results. I'll try to get proper leads and check into that coil resistance.
As I wrote a bit before, be patient, I have some other fish to fry, this is a hobby car, so if i'm not coming back to you immediately or not do all that's advised, take it easy.
Thanks a zillion for the help, much appreciated.