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Au/Fairmont oil pressure low 


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 Post subject: Au/Fairmont oil pressure low
Posted: Wed May 16, 2018 10:06 am 
Fordmods Newbie

Age: 68

Posts: 2

Joined: 4th Mar 2018

Ride: 1998 Fairmont

Location: Charters Towers
QLD, Australia

Hi Guys
Have found the cause of the fluctuating pressure. It is indeed a faulty earth. There is a short earth which connects the body to the chassis directly below the oil pressure sensor. When broken, the oil pressure fluctuates wildly. Incorrect installation is the cause of failure ( with the lead pointing down instead of up to make an easy connection with the sump) . This puts tension on the lead causing it to fracture probably after several large potholes or a starter exchange. (Jacking the body to give better access to the starter could also break the earth connection ). Removing and re-installing the earth taking care to replace correctly will fix the problem. Will supply pics if requested.
Thanks and happy motoring.
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