Oil Pressure gauge inaccurate
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Joined: May 2002
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From: MidWest
Oil Pressure gauge inaccurate
I have a 93RX7 with M2 Stage 3 mods.
I have a oil pressure reading problem. It seems to read fine during RPM's at 4K and above, but below it reads almost at zero. I know the oil pressure and lub system is working. Motor has ~10K Mazda Rebuilt.
Person I bought it from said he replaced oil sending unit with new. Could it be that the sending units bad again.
I checked oil sending unit with compressed air and the VOM meter read zero to short during test. No vari on ohms.
Dealer said new oil sending unit is about $100.00 is that the going price for OEM or is there a better after market one available. Thought about installing an after market oil pressure gauge but I don't want to make the RX7 look like a steam engine with more gauges.
I have a oil pressure reading problem. It seems to read fine during RPM's at 4K and above, but below it reads almost at zero. I know the oil pressure and lub system is working. Motor has ~10K Mazda Rebuilt.
Person I bought it from said he replaced oil sending unit with new. Could it be that the sending units bad again.
I checked oil sending unit with compressed air and the VOM meter read zero to short during test. No vari on ohms.
Dealer said new oil sending unit is about $100.00 is that the going price for OEM or is there a better after market one available. Thought about installing an after market oil pressure gauge but I don't want to make the RX7 look like a steam engine with more gauges.
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From: Where there's only two seasons, hot and wet! I love Okinawa
Re: Oil Pressure gauge inaccurate
Originally posted by powermalex
I have a 93RX7 with M2 Stage 3 mods.
I have a oil pressure reading problem. It seems to read fine during RPM's at 4K and above, but below it reads almost at zero. I know the oil pressure and lub system is working. Motor has ~10K Mazda Rebuilt.
Person I bought it from said he replaced oil sending unit with new. Could it be that the sending units bad again.
I checked oil sending unit with compressed air and the VOM meter read zero to short during test. No vari on ohms.
Dealer said new oil sending unit is about $100.00 is that the going price for OEM or is there a better after market one available. Thought about installing an after market oil pressure gauge but I don't want to make the RX7 look like a steam engine with more gauges.
I have a 93RX7 with M2 Stage 3 mods.
I have a oil pressure reading problem. It seems to read fine during RPM's at 4K and above, but below it reads almost at zero. I know the oil pressure and lub system is working. Motor has ~10K Mazda Rebuilt.
Person I bought it from said he replaced oil sending unit with new. Could it be that the sending units bad again.
I checked oil sending unit with compressed air and the VOM meter read zero to short during test. No vari on ohms.
Dealer said new oil sending unit is about $100.00 is that the going price for OEM or is there a better after market one available. Thought about installing an after market oil pressure gauge but I don't want to make the RX7 look like a steam engine with more gauges.
Thread Starter
Senior Member
Joined: May 2002
Posts: 603
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From: MidWest
What's the best way to clean sending unit?
Also whats a defi oil pressure gauge look like. I'm thinking of taking my 2nd gen sending unit out and trying it on my 3rd gen.
Comment anyone..........
Also whats a defi oil pressure gauge look like. I'm thinking of taking my 2nd gen sending unit out and trying it on my 3rd gen.
Comment anyone..........
Ex fd *****
Joined: May 2001
Posts: 1,782
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From: Ventura CA USA
In addition to cleaning the sending unit check the electrical CONNECTORS, broken/frayed wires or Oil/dirt in the FEMALE half (the part on the harness) can effect the readings also and is often overlooked when replacing the sender.
Last edited by maxpesce; Jun 4, 2002 at 09:54 AM.
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Joined: Apr 2002
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From: Thousand Oaks, CA
Both my brother and I have 93 RX-7s and the gauge does the same thing. Mine will go from reading nothing at low rpm to a reasonable amount and read low at RPM to reading a reasonable amount. It scared me at first but I am told the gauges just arent that good. I might try cleaning mine to see what happens.
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