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Oil pressure switch help needed
Posted 19 November 2012 - 09:29 PM
Now I see that this part goes in a different port, which has what appears to be the factory plug. So I took out the plug, installed the new switch and oil pressure now works kinda. Turn on the ignition switch gauge does nothing (maybe this is how it is supposed to be?) Start the car, gauge is well below zero. Raise the rpms or drive, the highest oil pressure I get is dead on zero. I haven't removed the old switch
because I don't have a plug for that port. I assume that the old switch is oil pressure switch with light. At least thats what I have figured out by looking at parts online at multiple websites. Now Assuming I have the correct switch NOW:confused: How do I get the gauge to work properly? Does anyone know the ohm values for the sending unit? Can I raise the resistance with a resistor to make the gauge work within the proper values? How can I tell if the motor is not original?
I know thats alots questions for such a simple thing but I really would like my oil pressure gauge to work especially since I have one. I hate dummy lights.
Thanks for any and all help in this issue.
Posted 20 November 2012 - 02:05 AM
Posted 20 November 2012 - 02:32 AM
Yes, you don't need to get a new switch or anything. From what I've read, just take apart that cluster and move the needle, by hand, back to the zero position. I think what happens (based on what I've read) is some electrical connection grounds out, and the needle drops to below zero. Then it's like that until someone fixes it.
I have the issue in my car, but haven't done anything about it. There are too many things to remove for me (I'm kinda lazy), and I don't see it being worth doing. These oil pressure gauges aren't all too accurate (again, from what I've read), so they're almost useless. It's better to get an aftermarket gauge and get a better reading.
What I would do too, is while you have the cluster out of the dash, replace the backlighting to LEDs (Loyale 2.7 Turbo did a write-up of how to do so, along with how to take out the instrument cluster, here: http://www.ultimates...ad.php?t=136231). This way, you knock out two birds with one stone.
Posted 20 November 2012 - 03:11 AM
theres a couple different kinds of gauges (mechanical, electronic, etc), make sure your sender and whatever unit you use to read it are the same type.
Posted 22 November 2012 - 01:50 PM
Now you have a proper sender for the gauge. But your needles deflection is off.
Take lens off dash, turn key on.....carefully adjust needle to Zero.
Posted 22 November 2012 - 04:49 PM
Once you have the correct unit installed, then you will need to manually adjust the needle to zero it out. Zeroing out the gauge does require getting access to the instrument cluster. Not all that difficult.
After it has been zeroed out it will likely still continue to read pressure slightly lower than actual, but at least it will be reading a positive value. This has been my experience and I have read the same from others.
Posted 11 December 2012 - 07:54 PM
Thanks again to everyone, usmb is the best.
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