1978 1.5 autochoke starting issues
Posted
#1380718
(In Topic #181059)
Old Timer
The car has developed some running issues, its a 1.5 with an auto choke. The car is a second car and used maybe 3 or 4 times a month during the winter.
This is whats happening:
To start car:
I have to keep the key turned all the way with starter motor engaged, pumping accelerator, for around 10 seconds.
When engine finally starts I have to give the car full throttle or else it dies.
With the accelerator all the way down to the floor the revs don’t move, engine stays at about 1000 rpm for about another 15 seconds (this is with pedal flat to the floor!)
The revs slowly start to increase and when they hit 2000rpm I can start to come off the accelerator.
I have to hold the gas a bit. If I don’t the car will either (a)stall or (b)idle at 100rpm (yes 100rpm, no typo)
When I come up to traffic lights I have to use left foot to brake and right to hold the gas, if it don’t it stalls.
Once engine has started to warm (needle has moved) the auto choke will kick in, hold the car at 1500 - 2000rpm and once the car is at running temp it idles fine at 900rpm
May be related sometimes when I go to pull away from stationary the revs will drop and almost stall, meaning I have to over rev the car in 1st to get going.
Any ideas?
Thanks in advance
Scott
Posted
Local Hero
I had problems with a pierburg 1B on our Mk2 polo, symptoms were similar to yours and the mount and hoses fixed it. Whilst I had the carb off I flushed it all out and cleaned it up with carb cleaner.
If you replace the vac hoses use silicone hoses rather than the braided rubber ones, I found that the rubber ones perish after a couple of months.
Also make sure your warm air ducting/pipe is connected to the air cleaner.
Posted
Old Timer
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