Strange running Mk3 Golf | Technical matters | Back Room Forum

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Wed 29 Nov 2006 12:15

Strange running Mk3 Golf - Peter D

Yesterday I repaired a burst pipe on my Steering servo feed pipe that had deposited the contents of the header tank all over the engine. After completion and running the car a short while I bathed the whole engine bay in gunk and left it 20 mins or so then carefully washed it all off after covering the dizy and throttle body. After doing this I restarted the car no probs and moved it to clean the drive OK. Later I went out to take it for a run but it completely refused to start. I check for water and found the Hall effect sensor connector was wet so dried and tried again, no go but a smell of fuel. Flooded I thought. Left it over night and sure enough it started this morning after a bit of hesitation it fired on all 4 and took it a run but it was a bit lumpy and rough. If I sit with the revs at 2600 ish every 4 seconds ithe revs drop to 2400 and it keeps doing this. On load I can not detect it doing this. The car is now very warm so I have left it to dry out futher. However it has crossed my mind that this dipping of revs could be the O2 sensor backing the mixture off in a cyclic fashion due to contamination. It was well flooded but cleared quickly enough this morning. Any ideas or welcome. Regards Peter

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Wed 29 Nov 2006 16:26

Strange running Mk3 Golf - ggh1

My first port of call would be to check if your ignition coil eht turret has cracked (internaly), mine had and left me stranded in a drive through carwash and other inopportune places.

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