Yes, I recently went through this with a fellow over on FBBO with a fuel gauge, and the gauge was damaged and not registering correctly. A different gauge worked fine with the same sender and limiter.
If you have one of the solid state limiters (not the RTE one), then check the voltage to be sure it is at a steady 5v. The RTE limiter supposedly pulses like the original limiter so is harder to check.
An issue with a firewall-to-engine strap is not likely if the temp gauge registers correctly; the temp sensor and oil pressure sensor both ground via the block. So if one is good, they both should be good.
BTW, some nut on here is advocating the practical step of attaching a manual oil pressure gauge to see what the oil pressure really is..... something about seeing if you really have good oil pressure.... where does he get such ideas? LOL
