GolfGTIforum.co.uk
Model specific boards => Golf mk2 => Topic started by: jedi16v on 29 January 2004, 00:02
-
has anybody got any ideas . i got a 1989 16v k-jet gti and just recently i'm having a job to start it . it seems to be when its cold . as when it is warmed up, switched off then restarted it seems to be ok . i heard it could be the cold start valve ? if this is true wher about's is it ? any help would be app. . ???
-
My 16v doesnt like starting from cold as well mate it takes ages ive swapped the coldstart valve and the thermotime switch but its still the same. Its fine when its warm :-\
-
I've been told it could be down to the spark plugs not sparking correctly due to not getting enough power from the battery.
???
-
mine does this aswell
i think its caused by leaky injectors which drip overnight, so that when you try to start the car in the morning, its bascially flooded!
haynes details how to test your injectors
-
Leaky injectors will usually cause a problem with hot starting. If the cold start valve is ok then look at the warm up regulator.
-
nah its when its cold and left for a long period of time, i.e. overnight that the injector leak is noticeable
warm starts is fine as there is not long enough period of time to cause the mini flooding.
try disconnecting the cold start valve and starting it - these leak also
-
You won't get a problem with flooding if you leave the car overnight.
Are you sure your problem is caused by the injectors? i doubt it is.
-
i know mines the injectors simply because first time you try and start it, it takes ages due to the excess fuel in cylinders once this is burned off it eventually starts.
if as soon as it catches i turn the ignition off, then start it again, it will start on the first turn.
just pull the injector out and stick it in a jamjar, start the car on 3 cylinders then turn it off, after 7 secs (i think) there should be no more fuel dripping out the injector.
-
if as soon as it catches i turn the ignition off, then start it again, it will start on the first turn.
If the injectors were leaking then wouldn't you flood it doing this?. Have you actually removed them and tested them?
Are you saying that your injectors drip all night?
If the injectors leaked for a while after you turned the car off then the fuel vapour would be long gone by time you started the car in the morning.
-
cheers for all the help guys . will check these things out ;)
-
My old Audi coupe GT had worn injectors that resulted in starting problems in the morning after being left overnight. I thought the fuel would evaporate over night, but for some reason it doesn't. A temporary fix that worked really well for that car (so turned in to a permenant fix :P) was to disconnect the extra cold start injector in the inlet manifold.
-
Are you sure the cold start valve wasn't the problem to start with?
The fuel will vapourise if left overnight in the cylinder, same as it vapourising when cold starting hence an extra injector is needed.
-
It was a known 'fix' at the time, to unplug the cold start injector. The fuel, and don't ask me why, doesn't seem to vapourize in the cylinder. I used to think it should, however, one morning I removed a spark plug and it absolutely stunk of fuel in there (and that was without cranking the ignition or even switching it on). I guess removing the spark plugs the night before would help to allow it to vapourize.
Just my experience, might not hold true in all cases of injector wear :-\
-
The injectors must have been pissing it out for that to happen. :o
-
I think they continually drip over night until the accumulator and system pressure drops, which I imagine could take some time and a fair amount of fuel. Once the fuel starts pooling on the piston crown I think it must take some time to evaporate, hence squirting that extra fuel in with the extra injector causing even more problems.
The Audi used to start first fire when I got it. Over a period of around 4 years it progressively took longer crank times to start and I started to notice the smell of fuel (flooding). I unplugged that extra injector (after reading an article about said problem in VW-Audi magazine) and sure enough it started straight away. I had that car for 11 years and put 120,000 miles on it. I sold it with 220,000 miles on it, the head had never been off and they were still the original injectors so I guess it's quite possible they were in dire need of replacement.
-
How did the car run with the worn injectors?
-
It ran as good as the day I bought it (as far as I could tell), hence I never replaced them. I'm a great believer in not touching anything that isn't broken so I didn't see the point in replacing the injectors, even though 220,000 miles is expecting rather a lot........agreed.
Don't get me wrong though, I (like you I'm sure) am methodical with regular maintenance i.e timing belts and oil changes etc., its just things like injectors I would replace 'on-condition'.
-
Just nipped into 'chat'
-
sorry to be completely stupid could anyone point out where the cold start valve and the warm up regulators are . much app. :-[ :)