Exhaust Gas Analyser

Changed my injector seals, well got one left which is a complete bitch to move, but will be done at some point.

Now car is running a bit rouch and would like to set up the mixture correctly any idea of cheapish gas analysers or any other ideas.

Cheers

Gunsons colour tune works well for me - through the MoT every time

Right will check it out at halfords and see what I come up with.


Cheers

You should do it ASAP - my car was running at 8% CO after I'd changed these seals.

To give you a guide to how bad it would be to run the car for more than a few days like this, the VAG ideal setting is 1% (+/- 0.5%), and the MOT limit for an '83 car is 4.5%, and at 9-10%, the engine won't even run!

Will make the mixture a bit leaner then anyway just to be on the safe side until I can get a tester thingy

Most places able to do the MOT will let you use their professional kit for a very small fee (depending on how well you know the mechanic).  Where I go for my MOT's he just lets me hook up to the machine if its quiet…

How does that Gunston thing work Rich?? since I had the top end done on mine, and have not yet had it tuned-up I can visibly see my tank of petrol dwindling before my eyes. Oh and how much?
TC

It goes between your cylinder head and your spark plug and is effectively a window so you can see the "burn" combust in the cylinder.

The combustion burns with a blue flame when its at optimum air/fuel mixure so you just watch it - adjust the fuel then watch it again until it gets right.

There are other ways to set it purely by ear though…

Steve, do you listen for anything in particular? Have adjusted mine by ear a couple of times. Found a zone of half-three quarter of a turn where I can here it idles strong and smooth, move either way out of this zone and it starts to get a bit lumpy and misses a bit. Seems to do the trick, haven't had the gasses checked though, can always lean it out a bit for MOT.

Cheers

The way to set it by ear is pretty much what you have described althought it is made easier by having an accurate tacho/dwell meter (well thats what I use).

Basically, you let the engine warm up and idle for a bit (be careful to keep out the way of the rad fan!).  You set the idle speed to whatever RPM you want using the throttle screw (well thats on a carb, I'm guessing there will be similar on the K-Jet).  You then adjust the mixture screw half a turn and leave the engine for 20 seconds or so to settle out.  The result will be either an increase or decrease in RPM.  If it increased, give it another half a turn and wait again.  You will reach the point where it isn't increasing anymore and starts to decrease - at this point you want to go back a bit and your mixture will be just about there.

Obviously if it was decreasing on your first turn you then need to go back the other way.

You need to lave it for a short while (abot half a minute) to settle out and you need to make sure that the RPM doesn't go too high - if it does, adjust it back down again.  See - dead simple…