Oil pressure idiot light stays on

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Looks like the problem might be that when the engine was pulled from my folks' old Dodge Maxivan and sent off to be rebuilt, a new sender (large can style) was installed for a gauge, not a dash light. We'll know soon enough when it gets replaced this weekend. :oops:

As for the pressure gauge, it really isn't the fact that plastic tubing is being used. It's just that when I installed a similar gauge on the car's original slant six, it wasn't long before oil began slowly seeping behind the gauge's glass on the dial. Fortunately, it was only there for the initial setup of the newly rebuilt engine and got removed fairly soon. Thinking back on it, I would have to admit it was probably a fairly cheap one acquired at a local parts store.

Thanks for all the input.