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Thread: Golf gti anoying idle/start problems

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  1. Golf gti anoying idle/start problems 
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    Hi there, I am having a couple of problems with my car and could do with some advice. I bought the car about 4 months ago. I noticed on cold start ups you needed some revs to stop the car idleing ruff and sometimes cutting out. Recently the car has got worse and i took the car to a garage to get it fixed. They did diagnostics and changed the Coil pack and HT leads. I got the car back and all seemed fine except the car sometimes didnt start on the first attempt without a little rev. Now the car has got worse and the engine checklight has come back on. I took the spark plugs out on the weekend and they look carbon fould. Fuel mixture to rich? I have also taken out the MAF sensor and will be cleaning it tomorrow. I did notice on the air intake where the breather pipe from the engine joins it is a lot of oil blocked and also oil in the air intake pipe after the MAF sensor. I will clean the throttle body aswell when i can. Can anyone shed any light on this/these problems? Thanks Jack
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    Did you get anywhere with this? I've got something similar on my mk3. When I took off the air filter box there was a lot of oil around. Thinking of changing the leads and putting the air filter back on and ignoring the fact I've seen any oil. Not sure that would be the best course of action though.

    I know on my old mk2 (many years ago) there was some kind of breather pipe that went from the sump to the air filter box. When this got blocked my whole engine started putting oil out from everywhere. I wonder if this is similar and some of this oil is getting into the air intake?
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    Hi, I cleaned all the air intake pipes, throttle body, MAF sensor. Changed the Air filter. The car seems to start better and idles smother. I also changed the spark plugs because they were carbon fouled and i had changed them a couple of months previous and i was worried they were the wrong ones (causing the problem). I went with NKG this time instead of the Bosch that i got from halfords. Think the bosch ones may not suit my car aswell as the NKG, Or they gave me the wrong ones in Halfords. But i did go back and double check. They werent certain they were compatible. This might be a temporary fix or maybe it was the spark plugs. What are your symptoms? Jak
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    Mine is idling rough, occasionally cuts out at junctions and when pulling away, and most annoyingly will loose power and cut to 3 cylinders randomly when you're driving along. Changed plugs and distrib cap/rotor arm and I've just ordered up some new ignition leads. It was the oil around the throttle control that interested me though. I might clean all that up as you have and hope for a smoother time of it.
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    Quote Originally Posted by bigcrags View Post
    Did you get anywhere with this? I've got something similar on my mk3. When I took off the air filter box there was a lot of oil around. Thinking of changing the leads and putting the air filter back on and ignoring the fact I've seen any oil. Not sure that would be the best course of action though.

    I know on my old mk2 (many years ago) there was some kind of breather pipe that went from the sump to the air filter box. When this got blocked my whole engine started putting oil out from everywhere. I wonder if this is similar and some of this oil is getting into the air intake?
    id investigate this further... dont ever ignore the fact you have oil in your air intake box.... your engine does not like to breath oil.. id try and find the source of the oil contamination and replace the filter

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    Thanks. Changing the leads fixed the running on 3 cylinders thing but you're right about not ignoring the oil. I'm going to investigate that next.

    Just as I'm getting this sorted out my other car - Audi A4 - has started overheating! Typical.
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  7. Talking  
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    hi there i had similar problems with my mk3 gti cutting out @ junctions first i changed the fuel relay and that never worked , cleaned the throttle body too still the same thing then changed the engine speed sensor which has a few other names aswell but that seemed to do the trick been running sweet ever since
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