MK2 kjet abf Smoking

[Diamond Hell]

When you did the compression test, did you test dry and 'wet' after a squirt of oil into the cylinders?

If there's a difference it could be that the rings are shot.

Has the metering head had a knock at all?  They're such sensitive little petals that it might have taken against you because of something that happened to it.

From your description it points at the fifth injector or something else to do with the cold-start circuit - it maybe spraying/dribbling too much and trying to flood the car.

What was it converted from and to?

[Diluxe]

they only dry tested, all had similair results i believe.

okay i can understand leaky injectors make it difficult to start, but would they also lead to the heavy blue smoke, which clears up after about 3 minutes?

[Conker]

Mine does a milder version of what yours is doing, and I reckon its stem seals (mainly due to the colour of the smoke), although I am yet to do a compression test to check. Apparently if your valve guides are worn, the new stem seals can be ruined in less than a week, so even though you've had them replaced, it might need the guides doing too.

Post up any progress you make.

[Diluxe]

havent had a chance to look over the car since last post, started it up yesterday & it wasnt smoking at all, apart from some condensation build up but definitely no blue smoke, the only thing i did do was unplug the throttle switch before starting up.

The difference this made was amazing, it idled far better, and before when i feathered the throttle the car would want to stutter and die immediately until it had built up some heat.

is the switch faulty or something linked to it?

[Diamond Hell]

Which switch did you disconnect?

Picture for avoidance of doubt, please.

[Diluxe]

the black box thing bottom right of picture


http://i33.photobucket.com/albums/d96/diluxe/IMAGE_056.jpg

[rubjonny]

hmm, the idle switch sends power to the metal vacuum switch round the back of the metering head off idle, worth having a look at it.  At idle it sends 12v to the idle control unit, so that could also suggest theres summat up with that or some of the idle control gubbins.  Check all your vac lines for damage too.

If the vac unit wires were shorting out it'll be sending 12v constantly to the 5th injector till the thermoswitch on the side of the head switches off, whenever the throttle is off idle.

[Diluxe]

do you mean that flying saucer like thing that sits at the rear of the airbox on the left? what does it actually do?

[rubjonny]

its for enriching the fuel mixture a tad when cold, when you put a load on the engine off idle. i.e. floor it to pull away, it makes the 5th inj chuck a bit more fuel in.

[Diluxe]

I've never been able to figure out how these things work that only have two wires going into them, 

I wonder how it gives a reading to what ever its connected too fire the 5th injector?

I've fired the car over on a cold day with the 5th injector out and it definitely did not fire, but I read somewhere that it never gets cold enough in this country for the 5th injector ever to be used?