Oil Pressure Gague
Discussion
Since I have had my car (98 model) the pressure gauge goes to max as soon as the ignition is switched on.
I have fitted a new sender and still the same, plus I tried an additional earth from the sender body.
The car has had a very recent replacement c/f dash fitted, do you think the wires could be crossed on the gauge itself?
Rob
I have fitted a new sender and still the same, plus I tried an additional earth from the sender body.
The car has had a very recent replacement c/f dash fitted, do you think the wires could be crossed on the gauge itself?
Rob
I had all kinds of fun with mine. Numbers subject to faulty memory. Swapped sender with one from ebay, was the wrong type, some go from 270 ohms for zero pressure and zero ohms for 100PSI, others the other way round. So thats the first possibility, you have the wrong type of sender. My seller swapped for free.
Mine always read high (about 70PSI). In the end I got a replacement gauge from a scrappy, and all worked perfect except the glass was scratched on the replacement. So as I had nothing to loose I set about dismantling the old one to find out how, and to see if I could swap the glass over. Good news its possible.
Put the gauge in a vice. Then use a pointed implement like a bradawl, and tap carefully round and round the folded aluminum to stretch it out straight, then you can (after some struggling) twist off the aluminum surround. The instrument will then drop out. It is badly made. Resistors joined just with a bit of solder - not even twisted first. Two had separated on mine. An easy repair. So reassembled and put back in. My hacking attempts are not visible when installed.
The gauge can be tested on the bench. If you know the characteristics of the sender, have a few resistors, and a battery.
Say the sender is 30 to 270 ohms, 0-100psi, then apply power and earth to the gauge, then connect the sensing lead of the gauge to earth via a 30 ohm, (should read zero PSI) and then the same with a 270 ohm, should read 100PSI. If not the gauge is faulty.
Mine always read high (about 70PSI). In the end I got a replacement gauge from a scrappy, and all worked perfect except the glass was scratched on the replacement. So as I had nothing to loose I set about dismantling the old one to find out how, and to see if I could swap the glass over. Good news its possible.
Put the gauge in a vice. Then use a pointed implement like a bradawl, and tap carefully round and round the folded aluminum to stretch it out straight, then you can (after some struggling) twist off the aluminum surround. The instrument will then drop out. It is badly made. Resistors joined just with a bit of solder - not even twisted first. Two had separated on mine. An easy repair. So reassembled and put back in. My hacking attempts are not visible when installed.
The gauge can be tested on the bench. If you know the characteristics of the sender, have a few resistors, and a battery.
Say the sender is 30 to 270 ohms, 0-100psi, then apply power and earth to the gauge, then connect the sensing lead of the gauge to earth via a 30 ohm, (should read zero PSI) and then the same with a 270 ohm, should read 100PSI. If not the gauge is faulty.
My cheapy ebay oil pressure sender works perfectly, just fitted it this evening. Much better than the original TVR one.
I bought this one: http://www.ebay.co.uk/itm/370678852601?_trksid=p20...
Although it was £12.95 not £912.95!!! Not sure what that's all about!
I bought this one: http://www.ebay.co.uk/itm/370678852601?_trksid=p20...
Although it was £12.95 not £912.95!!! Not sure what that's all about!
zed4 said:
My cheapy ebay oil pressure sender works perfectly, just fitted it this evening. Much better than the original TVR one.
I bought this one: http://www.ebay.co.uk/itm/370678852601?_trksid=p20...
Although it was £12.95 not £912.95!!! Not sure what that's all about!
Yep, I fitted one of those to my P5B a couple of years ago. works fine.I bought this one: http://www.ebay.co.uk/itm/370678852601?_trksid=p20...
Although it was £12.95 not £912.95!!! Not sure what that's all about!
zed4 said:
My cheapy ebay oil pressure sender works perfectly, just fitted it this evening. Much better than the original TVR one.
I bought this one: http://www.ebay.co.uk/itm/370678852601?_trksid=p20...
Although it was £12.95 not £912.95!!! Not sure what that's all about!
Info......... When prices are inflated - seller is out of stock and in the above case, will drop to £12.95 when they have stock. Something to do with keeping place in listing and putting off buyers until stock is replaced.I bought this one: http://www.ebay.co.uk/itm/370678852601?_trksid=p20...
Although it was £12.95 not £912.95!!! Not sure what that's all about!
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