Stalling/back firing

[Grundo Farb]

I'm having a fairly tedious relationship with my Beta VX at the moment, the car has a habit of stalling and backfiring intermittently.

The problem seems to be esacerbated when its cold but isn't solely confined to then. The car starts fine, and revs at 1000rpm when cold, I drive it about 2km and go down a hill and then at every stop and traffic light from then on I can't keep the revs up and it stalls at every stop. I have to keep the revs above 2500 rpm or it will start to burble and backfire up through the carb so 4th gear is completely out of the question. If I keep the revs up it's great but unless I keep my foot on the accerator it can't idle.

The garage has replaced the distributor rotor, the coil lead, the spark plugs, they have put an oscilloscope on the distributor and four leads and can't replicate the problem.

They have suggested a priest to excorcise the demons next.

Any ideas????

[cthargiss]

This sounds suspiciously like a fuel flow problem. If changing the fuel filters(do not forget the little one in the carb) does not cure the problem, then start at the tank and work forward.
Craig

[VX131R]

had similar problems on my vx but niot quitethe same. would idle o.k, but hesitates when you boot it. Very loud backfires, especially when letting off the throttle. turned out the diaphrams in the carb were shot, was severly over fueling.

[andybeta]

The fact that the ignition circuit has all been replaced and the symptoms persist suggests CARB.

I had very similar probs on two occasions. First was cuased by a punctured diaphragm in the carb and second was caused by dodgy connector blocks going to/from the ignition switch causing the engine to monentarily die and then pick up, flooring it to try to keep it going meant some backfiring. Fiddling with the connector blocks fixed it in the short term. Long term the solution is to go through the under dash ignition wiring.

So two possibilities for you.

hope this is of help.

Andybeta