Engine Fire, now dies on idle

[rustyroamer]

Hello,
I've got a 1989 1.9 t25 and recently had a small fire where the fuel line above the engine had perished. It melted through the vacuum advance pipe and the wire that goes to the little black thing on the carb (?).

I replaced all the pipework and wires and the van now runs. Once youre up to speed everything is fine, but stopping at any junctions and the van dies while it idles.
There also sounds like some backfiring/popping on deceleration.

I checked the vacuum advance on the distributor by connecting a vacuum pump but im unable to create any sort of vacuum, so im assuming the fire must have melted the diaphragm inside. Could this be the cause of the stalling on idle?
I thought idle timing was set with the vacuum removed anyway so just assumed it must idle ok even if there was a problem here.

It obviously needs replacing so thats the next step, but do these symptoms suggest anything else i should be looking at also?

Many Thanks

 

[Rosie n' Jim]

Under closed throttle deceleration the vacuum would be fairly high, giving a lot of advance. This would generally increase the engine revs until it settles at idle. Without this advance, maybe the revs drop too fast causing the engine to die? Just an idea to kick things off, could be totally wrong. 

[tobydog]

Blocked idle jet resulting from fuel hose breaking down? Dismantle and clean the carb...

[Rosie n' Jim]

Does it idle normally except when pulling up at junctions?

[ajsimmo]

https://brickwerks.co.uk/product/vacuum ... 3-1-9l-dg/

Nice easy fix, can be done in situ. The extra advance at idle might just fix your issue.

Sent from my moto g(30) using Tapatalk

[rustyroamer]

https://brickwerks.co.uk/product/vacuum ... 3-1-9l-dg/

Nice easy fix, can be done in situ. The extra advance at idle might just fix your issue.

Sent from my moto g(30) using Tapatalk

Nipped over to brickwerks today for a new vacuum advance. Seemed to sort all the issues out. Idles nicely and no more popping on deceleration.

Carb could probably do with a clean out but that can be a task for the winter

Thanks for all the help everyone!