Troubleshooting the CRX

[101mpg]

Okay, I've got three main issues right now, only one which POSSIBLY affects MPG. 1989 CRX DX, stock 1.5L motor, automatic.

First - seat belt not fastened light will NOT go out. I have shorted the wires together to no avail. It blinks constantly.

Second - fuel gauge is not accurate. It reads beyond full most of the time, only occasionally (at about 1/4 tank) reading right, then goes back up. New fuel sending unit is about $300. The previous owner told me that started when he "hit a HUGE speedbump at the airport." Judging by things, at high speed, too. I believe there is an access port in the bottom of the trunk to get to the fuel tank? Anything that can lube this? Likely a 20 year old fuel sending unit and it's a little corroded likely.

Third - tachometer usually reads double the actual engine speed. Can fluctuate without affecting engine speed. Brand new distributor, and I've been told that the engine speed sensor runs off the distributor, but don't have a Helms manual for the CRX yet, so I don't know if this is correct.

Anyone have any help?