Anyone any ideas-
My golf1600 mk2 driver(h reg automatic)with carb and transistorised ignition loses power after 15 mins driving and misfires so badly that it stops. After a 3 minute "rest" it starts fine and goes for another 15 minutes. I've changed the plugs, dist cap and rotor, hall sender, control box all in the last year but the problem has restarted again after being ok for 9 months,would the parts nedd changing again or is there somthing I'm missing?
cheer Phillip of Exeter
|
Carburettor? - December? - Last occurred March 02?
Sounds like carb icing to me. Check out www.honestjohn.co.uk/forum/post/index.htm?v=i&t=86...9
As well as the suggestions in that posting, my Escort Mk3 (years ago) had a fault with a valve inside the aircleaner housing. This valve controls a flap which lifts to direct hot air into the carb when required. In miserable weather conditions, cold and damp but not necessarily freezing, blasted by spray from lorries on the motorway, the Escort would completely lose all power. Exactly as if the car had just run out of fuel. After a few minutes on the hard shoulder, the heat of the engine warms everything up again, and the car can set off for a few more miles.
Dangerous.
Ian
|
Since the common element maybe cold weather, check that the air inlet pipe still exists, thermostatic flap works etc Icing is a good bet.
Also look at the parts that you did not replace but disturbed when fitting new parts. Since it stops almost completely, top of my list would be coil, coil connections and HT lead to distributor. The time element maybe temperature dependency, after restarting when warm does it still take 115 mins to cut out?
pmh (was peter)
|
Hi,thanks for the info--- Yes the air inlet pipe from exaust maniflod is ok,(havent checked the thermo flaps yet) and yes it cuts out every 15-30 mins even when warm or travelling fast or slow. I aslo changed the coil a year ago as well, cant remember if I also changed the leads but will change the coil/dist cap lead tomorrow and hope. Today it stopped three times over a 50 mile trip and I could restart it after literally 2 mins. The exaust is very black now this problem is happening and when it cuts out there is a strong smell of unburtn petrol. any more ideas?
Phillip
|
Your comment about black exhaust points towards an overfuelling problem. I dont know about this model Golf and carb but look at some prvious threads re carb waxstat problems on some vw Polos I think.
Why it should be Time/temp dependent tho I cant think.
pmh (was peter)
|
|
|
|
Have you checked the mixture?
|
|
|
|
I don't think its freezing then(some people think whenever a carb cuts out it is down to this). Your carb could be worn out or just badly adjusted. Try Gunston colour tune plug (put it in instead of spark plug) and see what colour it shows with the engine running.
|
|
|
|
|
|
Could be icing, a lot of people on here have had problems with this. If the hot air hose is intact and working , then i would suggest checking the ignition system when the engine cuts out. See if you get a spark from the coil and then the ht leads. You said you replaced the hall sender, not the distributor. Check the distributor turns freely.
|
|
|
Phil,
It's probaly the temperature controlled brass valve in the air filter box that is gummed up and doesn't allow the vacuum from the base of the carb to pull the vacuum contolled flap that directs the hot air from the exhaust maifold. Try to clean it in situ with an aerosol(brake cleaner - or carb cleaner ) with a tube on it to get it right into the valve. You'll find that there are two little plaxtic tubes running to this little valve, one from ther base of the carb the other to the flap unit. You can chek if ther is suction on it with the cold engine running - pull the tube off the flap unit and ss if ther is suction - if ther isn't the valve is faulty.
If that desn't solv it check for a perished rubber bung on an unused vacuum draw off at the base of the carb especially around the back that won't be clearly visible . I had a pierburg 2e2 on an 87 1800 passat that used to do the same thing evry two years - the engine had done 210k and used to get some oil into the air filter which would block this vlave. Passat was a model of overall reliability thats why I DIY - 2 breakdowns in 160k miles - top hose split & alternator gone - you should get similar miles out of your golf. All spares came from German & Swedish.
|
|
|
