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While driving down the highway and stuck in the slow lane waiting to take the next exit behind a garbage truck, I was being patient and waiting for the on ramp just past the next exit to make my move. Ambient air temp was around 90 and I had been in 4th gear doing 50 or so for about 1.5 miles. All of a sudden I got the DIC alert to check gauges and notices the Oil Pressure Gauge went down to zero, and then immediately went back to about 45/50 PSI as normal...and alarm went away just as fast. I'd call this an anomaly but with just 2600 miles on my pre-owned C5 coup (53600 miles) it took me by surprise.
Electrical gremlin? Car drove fine rest of the way to meet my wife for lunch, back to work, and back to home.
I have posted a similar episode(twice) with my 99 coupe after relocating the oil sensor. In the first 2 years, only under the same overpass, mine dropped to zero, but before I could turn the key it came back to normal psi. This happened 3 times in the two year period. This summer it has done it seven out of nine times, only in this spot. I have had guys here tell me to put tin foil around the sensor, I have not done that yet, so weird
LOL ok that's strange. I imagine wearing a tin foil hat. Has to be something more than location related. Appreciate the input though. Glad I am not the only one. Have driven this route numerous time without this ever happening, so I'm inclined to believe it's more like a loose connection, or just idling the engine for so long...I did NOT relocate the sender BTW. Dealer replaced it.
From: Freedom is never more than one generation away from extinction.
St. Jude '03 thru '24
Originally Posted by akapounder
This summer it has done it seven out of nine times, only in this spot. I have had guys here tell me to put tin foil around the sensor, I have not done that yet, so weird
I have posted a similar episode(twice) with my 99 coupe after relocating the oil sensor. In the first 2 years, only under the same overpass, mine dropped to zero, but before I could turn the key it came back to normal psi. This happened 3 times in the two year period. This summer it has done it seven out of nine times, only in this spot. I have had guys here tell me to put tin foil around the sensor, I have not done that yet, so weird
I've been reading about the oil pressure sending units failing on the C5's and when I purchased mine back in April the previous owner made a point of telling me the oil pressure sending unit had been replaced. After spending the past 50+ years working on various vehicles I have never heard of so many oil pressure sending units failing on a given vehicle?? So, would someone please tell me why this is such a common and accepted problem? Repetitive problems with these sending units seem common as well. I have a '95 GMC pickup with 190,000 miles that still has the original sending unit. Is this a problem that could be heat related? If so, does relocating the sending unit eliminate the problem? Just wondering.
I've been reading about the oil pressure sending units failing on the C5's and when I purchased mine back in April the previous owner made a point of telling me the oil pressure sending unit had been replaced. After spending the past 50+ years working on various vehicles I have never heard of so many oil pressure sending units failing on a given vehicle?? So, would someone please tell me why this is such a common and accepted problem? Repetitive problems with these sending units seem common as well. I have a '95 GMC pickup with 190,000 miles that still has the original sending unit. Is this a problem that could be heat related? If so, does relocating the sending unit eliminate the problem? Just wondering.
It is a combination of a poorly designed part and the fact it is in a bad location. In the factory location it takes on some serious heat and vibration.
It is a combination of a poorly designed part and the fact it is in a bad location. In the factory location it takes on some serious heat and vibration.
since relocating mine, three years and close to 19,000 miles no issues (other than the one stated here)
(Michigan) I-96 at the Eastmanville exit, overpass is 68th street, there is a landfill there, maybe the Government buried a Spaceship there ????(no one is going digging there, major stink)
Could be some crazy EMI that affects the sender circuit... could also just be that precisely at that point you're driving in a way that causes something to shake juuuuust right.
Well I paid attention to what is around the exit that causes my oil pressure gauge to drop to zero. There are actually two culprits, one is a radio station antenna and about 500 feet or so it drops again after starting to go back to normal, then there is a cell tower ??? I am going to ground the sender and see what happens ???
OK that was wierd
Repetitive problems with these sending units seem common as well. I have a '95 GMC pickup with 190,000 miles that still has the original sending unit. Is this a problem that could be heat related? If so, does relocating the sending unit eliminate the problem? Just wondering.
since relocating mine, three years and close to 19,000 miles no issues (other than the one stated here)
