We just completed a 3361 mile, 3-1/2 week trip from Tucson up through the Grand Tetons, Yellowstone, Devil's Tower, Rapid city and associated attractions, then back down through Wyoming and Utah to Tucson. I had no problems with anything on the coach but I was concerned abut my oil pressure readings on the factory gauge. It never went below the low line (about 1/4 of the way up) and was always higher than that at any speed above idle, but it was all over the place while driving.

The engine has about 12,000 miles on it (now) and used about 1 pint of oil during the entire trip. The trip included SEVERAL 6 - 8 % grades for miles and miles in second gear and topped out at over 9600' elevation. All this while towing a 2003, four door Tracker (~3000#)

My dream is to someday go with a Mac-Dash and have a REAL oil pressure gauge among other things, but for now I would like to get the most accurate reading out of my stock gauge. If I remember correctly, the sending unit comes in two versions, a 60 ohm and a 90 ohm. Which one provides the most accurate reading on the gauge? I currently have a 60 ohm and don't trust it to be reading correctly.

Thanks.

Vadim,
Check your connection at the oil pressure sensor. If it is good, then try grounding the connector with a jumper wire... if the pressure reading on the Digipanel drops to zero, then you have a bad sensor. If it stays high, then you have an open in the wiring to the sensor.

The sensor wires on the DigiPanel are small, like #22. The internal wire can be broken by the crimp on the connector but the plastic insulation holds the wire in place. Give the connector a tug on the wire to be sure the wires are not broken. If they are broken, the wire insulation will stretch and the connector will fall off.

You didn't mention what the stock dash oil pressure gauge reads... I'm guessing it reads OK? There was an option on the DigiPanel to just tap into the existing sensor rather than add a second sensor.

I was able to add the second sensor with just one fitting:
http://www.gmcmhphotos.com/photos/misc/p63220-mounting-dual-oil-pressure-sendors.html

Simply long term wear. With the arm sitting there for most of its
current-bearing time, continually oscillating a trivial amount, the
contacts simply wore out, IMHO.

Ken H.

I drove my coach for 12 years before I cooked a transmission at a bit over
100,000 miles. So, I figured when I replaced it, I would put a Ragusa cast
aluminum finned oil pan on the transmission, along with a 3:70 to 1 final
drive. I modified the cover on the final drive so I could include a sending
unit for a temp gage. The Ragusa pan already has a bung for a sender. I
didn't hook up gages to the senders for a year or so, and made a trip
across Canada and back to Oregon without the gages hooked up. Then, a year
or so later, when we were planning to retrace the Route 66 from east to
west I decided to wire up the gages, along with new eagle wheels fitted
with B.F. Goodrich rubber, and every maintenance item that I could think
of. I hate trouble on the road. Fix it at home, and drive your best parts,
don't carry them as spares. It serves me very well.
Long story short, I found myself watching the hell out of those new
gages, anxious over the readings. If I had never hooked them up, I would
driven along fat, dumb, happy, and oblivious to the temps. Results were the
same. Coast to coast, no problems. But, I don't know how many times I took
my eyes off the road ahead to look at those gages. Way too many, for sure.
Jim Hupy
Salem, Oregon