Markymark Posted August 28, 2018 Share Posted August 28, 2018 All of a sudden I have a reading odf 8 on my oil pressure gauge rather than 5. I suspect it might be the sensor. Any pointers as to where i can find the sensor and any advice to solve? Clean/replace etcThanksMark Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted August 28, 2018 Member Share Posted August 28, 2018 Have you got the appropriate wiring diagram (let me know if you want one) and a multimeter?All other instruments working normally?Previous discussions.Jonathan Link to comment Share on other sites More sharing options...
Area Representative Iain McCallum Posted August 29, 2018 Area Representative Share Posted August 29, 2018 Hi Mark,I had similar issues with my Sigma oil pressure gauge reading erratically, so i ordered a new sender from Redine (Danfoss 1350) but i found that the connector to the chassis wiring was not making good contact, so i cleaned it, pushed it back together, and covered with insulating tape. Worked perfectly ever since!You can find it under the inlet throttle bodies just by the oil filter.Iain Link to comment Share on other sites More sharing options...
Markymark Posted August 29, 2018 Author Share Posted August 29, 2018 Thanks IainThat looks like my first port of call! I will try this this evening. Will also check if other gauges are reading funnily as well.CheersMark Link to comment Share on other sites More sharing options...
micksmetafors Posted August 29, 2018 Share Posted August 29, 2018 I changed mine using the Stack mechanical and sandwich plate adaptor from Merlin. Quite easy and accurate/reliable I think.Cheers, Steve Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted August 29, 2018 Member Share Posted August 29, 2018 How many terminals are there on the factory sensor?Jonathan Link to comment Share on other sites More sharing options...
The_ASH Posted August 29, 2018 Share Posted August 29, 2018 JK - A lot of the info for Danfrost (as someone at work used to call them) is online, I think this is the info for the transducer here http://products.danfoss.co.uk/productrange/documents/industrialautomation/pressure-transmitters/mbs-1350-oem-pressure-transmitter-with-dual-output-and-pulse-snubber/#/ Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted August 29, 2018 Member Share Posted August 29, 2018 Ah... I remember identifying those (and the discussion of snubbing) but thought that it was as a replacement rather than the original.Jonathan Link to comment Share on other sites More sharing options...
The_ASH Posted August 29, 2018 Share Posted August 29, 2018 Cheers, I’d forgotten that thread even though I’d commented on/in it.I may be repeating myself but wish something similar existed to replace the K Series sender (which is expensive oem and not fantastic) and avoid changing to a capillary gauge. Link to comment Share on other sites More sharing options...
Markymark Posted August 30, 2018 Author Share Posted August 30, 2018 Hi Ian I have located the above sensor and lead on the car. See pictures below. The one above is where the sensor is in the engine. I am assuming you cleaned the electrical contacts here rather han the connection to loom in picture two - I am guessing you are going to say both!CheersMark Link to comment Share on other sites More sharing options...
Markymark Posted September 9, 2018 Author Share Posted September 9, 2018 Thanks Iain for your help by PM the actual Fault was the sub loom. I changed this and the gauge now reads between 2 and 4 bar. Not replacing the sensor it’s self as “if it ain’t broke don’t fix it!” Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted September 10, 2018 Member Share Posted September 10, 2018 Well done.Did you localise the fault with a meter before swapping?ThanksJonathan Link to comment Share on other sites More sharing options...
Area Representative Iain McCallum Posted September 10, 2018 Area Representative Share Posted September 10, 2018 Mark didn't have a meter but suggested the sub loom as this nearly mirrored my Sigma oil pressure issue.Glad it is fixed now Mark!Cheers Iain Link to comment Share on other sites More sharing options...
Markymark Posted September 11, 2018 Author Share Posted September 11, 2018 As Iain stated I did not and do not have a multimeter. Instead of going down the route of buying a meter, a box spanner and maybe some loctite thread locker (not sure on this last thought) I took the approach of replacing the easiest part first- the pluggable sub-loom. Luckily for me this appears to have fixed the problem. 10 minute job which included removing the old one and securing the new one with cable ties.According to Iain and on inspection ( I can see where he is coming from) I also saved some skin on my knuckles as it is a right bugger to get to. Also I am apprehensive of screwing anything into the engine block in case I cross thread it! Location on the Sigma would suggest this is not an unlikely scenario for amateur like me!Mark Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted September 11, 2018 Member Share Posted September 11, 2018 :-)ThanksJonathan Link to comment Share on other sites More sharing options...
Alan Clark Posted December 21, 2023 Share Posted December 21, 2023 Where is the earth to the oil pressure gauge? Link to comment Share on other sites More sharing options...
Alan Clark Posted December 21, 2023 Share Posted December 21, 2023 My oil gauge is reading max without the engine running! Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted December 21, 2023 Member Share Posted December 21, 2023 (edited) 22 minutes ago, Alan Clark said: Where is the earth to the oil pressure gauge? ... My oil gauge is reading max without the engine running! Do you have the wiring diagram? Let me know if you need a copy. The gauge is earthed with other instruments to a pillar behind the dash. But the circuit that connects the gauge to the sender works by the sender offering a variable resistance to a local earth. `Does your sender have one or two terminal? Jonathan Edited December 21, 2023 by Jonathan Kay Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted December 21, 2023 Member Share Posted December 21, 2023 21 minutes ago, Alan Clark said: My oil gauge is reading max without the engine running! All other instruments OK? Any recent work on the car? Start with inspecting the connections to the sender... how many terminals, what colour are the wires, and are all the connections intact? Jonathan Link to comment Share on other sites More sharing options...
Area Representative paul richards Posted December 22, 2023 Area Representative Share Posted December 22, 2023 12 hours ago, Alan Clark said: Where is the earth to the oil pressure gauge? I assume the body of the sender earth to the engine block. Sounds like feed to the gauge is going to earth somewhere. This could be in the wiring or a faulty sender. Link to comment Share on other sites More sharing options...
Alan Clark Posted December 22, 2023 Share Posted December 22, 2023 Thanks for the response. The car is a 3 year old 270s assembled by myself. Less than 5k on the clock. The sender connections seem good and the gauge connections seem ok. All other gauges are working fine and the car performs well. Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted December 23, 2023 Member Share Posted December 23, 2023 1 Ignition ON but engine not running 2 Is the gauge still reading full scale? 3 Remove the connection at the sender... what happens to the indication on the gauge? Jonathan Link to comment Share on other sites More sharing options...
BigCol Posted December 23, 2023 Share Posted December 23, 2023 The sensor is apparently susceptible to damage through engine vibration which is why many folk recommend fitting a remote adaptor so the sensor can be isolated (see one of my list of winter jobs!) Link to comment Share on other sites More sharing options...
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