GolfGTIforum.co.uk
Model specific boards => Golf mk2 => Topic started by: Gareth on 12 May 2011, 18:13
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evening all,
right Ive finally got my kr engine in and started but the oil pressure light is flashing and when you pass 2k the buzzer come on so i take it both oil pressure sensors are not working :/ well im hoping it's the sensors! i can see fresh oil on the cams so i take it it's flowing ok.
i know one oil pressure sensor is right above the oil filter but what color wire should it have on it? and wheres the other oil sensor and what color wire should that one have on it? i have the pre 90s loom
cheers
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Got the 2 oil pressure switches wrong. On the oil filter housing swap the two connectors round. (Yelloiw and blue i think the wire colours are)
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ok thanks ill try that! so thats both sensors next to each other? cheers
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Not necessarily, you need to know which wire (blue/yellow) goes to which sensor (white/black) I can't remember without looking!. You may have an issue if its not been run for a while. It could be that they are the wrong way round, but it is meant to flash below a certain rpm, and then buzz above it...
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When i put my kr in. When ignition was on oil light wouldnt come on, then above 2k it buzzed. So i swapped the wires around on the sensors and it now works properly. But with out looking i couldnt tell you without looking. But sounds the same syptoms as mine
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Would also be worth fitting a gauge so you can test the pressure as well.
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Yeah once you find out which one goes on which, if they are on the right ones, and they're still going off,get a gauge on it to see what's happening. Like matey says they could just be the wrong way round though. Search for it, I'm sure rj wouldve mentioned it a million times by now!!
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Thanks for all your help :) what sort of gauge would I be looking for? Is the a special one for the job? And would I connect the gauge where the sensor would go? Cheers
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Yeah believe it or not its an 'oil pressure gauge'! All garages should have one, ask to use it for 5mins, or ask them to do the test with you there to make a note of results.. Yes you put it where the sensors are (either one) so you can see what pressures you've got there. You can also test at the back of the head where the oil temp sensor goes in, to see how much of a drop you have between positions. search on here for the pressures you should see at certain temps,revs, and positions..
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Ok thanks lol right I got hold of one today and I screwed it in where the sensor would of been directly above the oil filter. From cold start I got about 80psi On idle. Is that right? Seems a little high.
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Well that's 5.5 bar, which off the top of my head sounds alrite.. It will lower when warm, and increase with rpm. The important one to check is hot idle. Use the search button I'm sure rj has listed all the figures you need a few times now..
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Ok thanks lol right I got hold of one today and I screwed it in where the sensor would of been directly above the oil filter. From cold start I got about 80psi On idle. Is that right? Seems a little high.
Sounds about right from memory, was that hot or cold.
:smiley:
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That was a cold start
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Right I'm here now having a look at the car and I'm getting different readings on
Idel it's around 50psi for a cold start :/ i have taken the oil temp sensor off the back of the head and I get the same reading there. So I take it the oil pump is working ok? Sorry for all my questions just really worried about recking the engine
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I'd say it sounds good, as it doesn't drop going up top, but seriously, search 'oil pressure' etc and you'll find the results that will confirm everything, including what cable goes to which sensor, which might be all it is!!!
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right had a looks for the oil pressures and its given me some peace of mind. but i'm still having a problem with the oil light.
i tried grounding out both of the oil sensors wires and the light still flashes.
i have tested the wires from the clocks to the oil sensors and both of them defiantly have no breaks in them.
i have also tried a second set of clocks to check that was not the problem.
i have been looking through the Haynes manual and from what i can work out there's number 43 relay that sits on top of the fuse box that controls the oil sensors is that correct?
cheers
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does the light come on when you switch ignition on and hen go off when you start the car. or does the oil light not come on at all and then it buzzes past 2k?
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once i turn the ignition on it comes on and stays on even with engine running. it did buzz over 2k but does not now, even with the sensors unplugged with i think is strange
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it's abit strange that, have u got a spare relay to try?
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yeah there was a number 20 something i used from my 8v fusebox that had the same pins, still no luck maybe it's the wrong one i will try and get a 43 tomorrow. well im assuming it controls something to do with the oil sensors so i can make out from haynes.
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Well if everything has been checked and its only the relay left then must be. Its got the oil pressures fine and the sensors are on the right connectors. No wirings faulty.
You've narrowed it down quite alot