BOTH my fuel gauge and oil pressure gauge are fluctuating wildly. This is a 2000 Dodge Ram 1500 with the 5.2. They flop back and forth either while idling or when I'm driving. Fuel will read empty and oil will read 110 then they will switch. The other gauges are fine and my tranny guy said my PCM is reading these fluctuations but we know the oil pressure is fine. He thinks the PCM is about to crap out. There are no bad grounds, all have been checked and cleaned. Is it possible for the fuel sending unit/sensor and the oil pressure switch/sending unit to both go at the same exact time? Once in a while I will get a true reading then they go bonkers again. Could it be the gauges themselves? I have the cluster from my wrecked 1999 1500 5.2 but are they interchangable and then we have a false milage reading (2000 has 87,000 while my 1999 had 169,000). WTF!!! Any ideas guys, hubby is at a loss here.

 

Swap the clusters, and see what happens. If that fixes it, you can go to your department of motor vehicles, and get an odometer discrepancy form, and they will give you a sticker to afix to the truck somewhere.... or some such.

I would like to think that the dealer would also have some method of setting mileage on the cluster...... although, they might have to send them out for that service.

Test and see if it is indeed the cluster, if it is, take it from there.