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May 17, 2009 18:53:10 GMT
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Some may or maynot remember my skoda MOT and smokey engine issues. Well now the weather is nice again, and i have some mojo back (as well as tidying my shed so i can now actually see the floor again) I want to get on and sort the estelle. One of the more difficult issues i have is the smokey engine and emmissions, which i am assuming are connected. I have recently checked the fuel pump diaphragm, which was ok, drained the water like oil out and replaced it with some nice new 50wt oil. It smokes much much less now, but still chuffs a bit, and scored a 6 on the emissions test. Could overfueling alone be the reason for both the smoke and emissions? Anyone got a guide to tuning the stock weber replacement carb? Can i tune it at home or does it need a computer or a tuning/mixture guage of some sort to get it working? Can I just lean it out until it starts to pink/run rough and then richen it or does it need to be done propperly. Its the 120 engine with stock exhaust and the stock weber replacement carb. Any help much appreciated. Have some Skodas in payment.     I lol'd at the impreza replica!! ;D   |
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May 17, 2009 18:56:05 GMT
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My usual method for MOTs is to lean it right out until it starts stuttering then back it off a little.
What colour is the smoke? And does it do it regardless of engine speed / load?
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May 17, 2009 19:05:12 GMT
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The smoke is sort of white ish.
Its not really blue, and doesn't really smell of oil. It smells more petrolly than that.
If you give it a real hard run then the smoke almost goes away, other than changing gear when it can create a little ball of death. I smoke screaned a poor cycalist on the way to the MOT!
The engine runs well and gives good power (only 46bhp anyway).
I can't comment on fuel consumptiion, not really driven it enough to know.
Lewis
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Potter
Part of things
'E who dares wins,eh Rodders??!
Posts: 304
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May 17, 2009 19:12:23 GMT
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White smoke signifies a too rich mixture I think.
Oil smoke is very bluish,almost like cigarette smoke.
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More cars than sense or money!🙄
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May 17, 2009 19:29:04 GMT
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:)Most decent friendly garages will turn the CO down for you FOC if you're using them for MOT...only a turn of a screw afterall.
The standard Weber carb replacement mixture screw is a bit fiddly to get to with the air filter fitted and it's not a conventional screw. It's on the rocker cover side of the carb and you can turn it with your fingers or long nosed pliers. Turn it in [clockwise] to weaken, out to richen. Turn it in till the engine starts to run poorly, then turn it out just enough to make it smooth.
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May 17, 2009 19:34:34 GMT
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Spot on dave, nice one.
I could get it done at MOT time, but I would rather turn up knowing its at least fairly close.
So, pop the filter off, at idle, turn it down until it has issues, then in a tad?! I take it i need to run it at load to make sure its not too lean up the rev range?!
P.s. dave, I still have a fav box and a few other bits next time I am up your way/you down my end if you are still interested.
Lewis
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May 17, 2009 19:38:36 GMT
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What I got told was White coolant/condensation moisture. Blue/grey oil Black overfueling. Is it this one that you have fitted? The 30BDIC. I had one of these fitted to my old 120 and it worked well, thirstier than standard but still efficient. Settings for the BDIC can be found here. Skodarapid.com is a great site that I dug out the details for. Loads of Skoda info on there, and I've been a reader for years. |
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May 17, 2009 19:46:52 GMT
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You don't need to take the filter off, it's just a bit fiddly with it on.
Leave the breather disconnected from the air filter for the test if it's a heavy breather!
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May 17, 2009 19:48:07 GMT
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Yeah, drop the other bits off if you don't need them mate. Ta.
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What I got told was White coolant/condensation moisture. Blue/grey oil Black overfueling. Is it this one that you have fitted? The 30BDIC. I had one of these fitted to my old 120 and it worked well, thirstier than standard but still efficient. Settings for the BDIC can be found here. Skodarapid.com is a great site that I dug out the details for. Loads of Skoda info on there, and I've been a reader for years. that's a GREAT link, been trying to tune mine for ages! had it done very,very weak pre-mot, was going to take it back to the mechanic that did it to make it real-world driveable. now I know how!!!! tomorrow morning just got a new plan! |
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May 18, 2009 17:05:31 GMT
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Looks like Joel has sort of abandoned Skodarapid.com although it used to have a fairly busy message board.
All the info is on the main site though. And if you look at the photos there are a few blasts from the past.
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May 18, 2009 18:25:01 GMT
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Great, thanks all.
I didn't get a chance today in the end, but I will get out there and fiddle tomorrow!
Lewis
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May 18, 2009 18:51:56 GMT
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HA HA HA HA HA HA HA HA HAAAAA!!!! Major Rofl at that Skoda Imprezza. Nice find! |
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May 20, 2009 17:54:54 GMT
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Well I have had a fiddle...
I have wound it in, at least 4 or so turns and has made NO difference, other than having to tweek the idle.
It now hunts a bit at idle, but sill revs fine and still smokes.
Do i just keep going until it won't run, or do i have bigger problems?
I will post a vid up in a while.
P.s. i take it it is the flat setscrew thing?!?!
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May 20, 2009 19:59:44 GMT
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vid at idle at half load and full sustained load will show up likely causes Lew  |
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May 20, 2009 20:16:21 GMT
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If it's hunting a bit, then it's lean.
Look at your spark plugs - they talk to you. They are about as accurate a picture as you can get of what's happening to your engine.
White depoits/glazed appearace/cracking - running lean and or hot.
Thick black deposits, but dry - running rich.
Thick, black, wet deposits - burning oil.
When does it make the most smoke? When revving up or when slowing down?
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May 20, 2009 21:22:54 GMT
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Well I have had a fiddle... I have wound it in, at least 4 or so turns and has made NO difference, other than having to tweek the idle. It now hunts a bit at idle, but sill revs fine and still smokes. Do I just keep going until it won't run, or do I have bigger problems? I will post a vid up in a while. P.s. I take it it is the flat setscrew thing?!?! That link I posted to Skodarapid.com should show which screw is which and what the factory settings should be. Could of course be worn valve guides or rings, and oil getting past. |
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May 21, 2009 16:50:16 GMT
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Well reading the guide is not really that clear.
It says set the idle, then adjust the mixture so that the highest tickover speed is achieved, reset the idle, then wind in the set screw half a turn.
So i think i have wound it too lean then, but it is still smoking, so i guess the motor is shot.
I will post the vid up now.
Lewis
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May 21, 2009 17:23:11 GMT
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Ok here is the pre-fiddle video  Here is the post fiddle video  I would love to pull the plugs out, but don't have a suitable socket to hand. Lewis |
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May 21, 2009 17:47:22 GMT
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post fiddle is far too rich. and you gotta pull those plugs out, guarantee you they're as black as a golliwog
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