Got a Problem!

[Len]

My dear wonderful car has a BAD misfire problem!!!

But....... its only at a certain time.

Car starts fine from cold but about half way hot it misfires badly as if its only firing on one or two cylinders.

Once its fully warmed up and had some revs its fine and drives normally with no decernable loss of power.

At first I thought it was damp and have sprayed all the usual electrics with Damp Start.

Now I'm at a loss to understand what this problem is! Could there be some kind of staged choke?

Any help gratefully received! :embarassed:

[Dom Mk3]

interesting... has the throttle body got that choke on the top? is it sticking perhaps??

[vwagain]

It could be the coil lead breaking down. I had one on my merc that only did it at a certain temp and then would be fine again!!!!!!!!  Try another lead,  Or it could be the coil pack

Stu

[Len]

Dom - have checked that and a liberal spray of WD40 on it!

vwagain - changed plugs and leads last weekend so unless I have a duff brand new lead then it cant be that!

[Dom Mk3]

did it do it with the old leads?

[Len]

No! This only started yesterday and as I said at first I thought it was just damp had got in but now I know its got to be something else!

Must be electrical but dont know what!

[Dom Mk3]

have you got the old leads? swap them over?

[Len]

Hmmmm yea well if I go and rescue them from the Bin collection!!

I'll give that a try and let ya know!

But surely that would happen at all revs and temps? This is a very specific time period. And it doesnt happen straight away from cold.

[Dom Mk3]

if it still happens maybe check the oil temp on the mfa? this might be a bit more accurate than the water temp gauge...

[AudiA8Quattro]

Len, if it didn't do it before you changed the leads then i suspect that might be your problem!