dummy gauges going stupid.....
Thread Starter
|
Junior User
Joined: Jun 2008
Posts: 82
Likes: 0
dummy gauges going stupid.....
I can't seem to figure out why the gauges are acting the way they are. After running for about 5 minutes the oil pressure gauge goes up slowly to the top. After running for about 10 minutes or so the temp gauge goes all the way up instantly at the same time the battery gauge goes all the way dead. Whats up with that? Where do I start?
I had a scanner on while running it and they definately aren't right.
I had a scanner on while running it and they definately aren't right.
Thread Starter
|
Junior User
Joined: Jun 2008
Posts: 82
Likes: 0
I really don't know where to start. I had 2 diesel mach on it and they are telling me to change the oil pressure sensor, and the collent temp sensor(which I have no idea where it is on an E-350) But then he missed the battery gauge reading dead. So I didn't hear what the "fix" for that was.
I am really suspicious about wasting money and time on just changing out the sensors. I already changed the oil pressur sensor once with another used one that worked last about a year ago when it was in an engine that was pulled from a wreck.
by the way, When I pull the plug on the oil pressure sensor it reads nothing, all the way to the bottom.
I am really suspicious about wasting money and time on just changing out the sensors. I already changed the oil pressur sensor once with another used one that worked last about a year ago when it was in an engine that was pulled from a wreck.
by the way, When I pull the plug on the oil pressure sensor it reads nothing, all the way to the bottom.
Hotshot
Joined: Jan 2008
Posts: 13,144
Likes: 11
From: Rochdale MA
That could be part of your problem. Low voltage will do some weird thing to electronics and other parts of these trucks.
Postmaster
Joined: Oct 2005
Posts: 2,956
Likes: 0
From: Northeast TN
Cha-Ching! ^^^^^^^^^ What Jim said.
Trending Topics
Thread Starter
|
Junior User
Joined: Jun 2008
Posts: 82
Likes: 0
Where is the collent temp sensor in a 1998 E-350?
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Cargo Master
Joined: Jan 2001
Posts: 2,726
Likes: 5
From: Slatington, PA
The oil pressure sensor is nothing more then a pressure switch that turns on at 7psi. I cant remember exactly where the coolant temp sensor is though. Its somewhere near the water pump more towards the drivers side......I think.
Thread Starter
|
Junior User
Joined: Jun 2008
Posts: 82
Likes: 0
Could It be from some sort of blow by? Would that eventually cause the oil pressure to rise? And the gauge is actually accurate. I did a cylinder contriubution test and all eight are running fine. (just a thought) please don't scare me if you aren't sure.........
Gone Fishin for Mark
Joined: Nov 2004
Posts: 1,354
Likes: 2
From: West of Houston
I just found this out myself, but the oil pressure guage does not read actual pressure, just that there is some. Any other electronic guage is gonna read a relative amount of voltage and convert it to the correct value. Screwed up voltage into the sensor will lead to screwed up info out of it. Fix the battery issue first. 
Cargo Master
Joined: Jan 2001
Posts: 2,726
Likes: 5
From: Slatington, PA
I agree that it is not that vital but why would the gauge start climing after it warms up? The "switch" turns on at 7psi but then isn't it supposed to read the oip pressure? Why would it be there if it is not that important anyways? I know the injectors won't turn on if the oil pressure is too high or too low.
Could It be from some sort of blow by? Would that eventually cause the oil pressure to rise? And the gauge is actually accurate. I did a cylinder contriubution test and all eight are running fine. (just a thought) please don't scare me if you aren't sure.........
Could It be from some sort of blow by? Would that eventually cause the oil pressure to rise? And the gauge is actually accurate. I did a cylinder contriubution test and all eight are running fine. (just a thought) please don't scare me if you aren't sure.........
Thread Starter
|
Junior User
Joined: Jun 2008
Posts: 82
Likes: 0
I just found this out myself, but the oil pressure guage does not read actual pressure, just that there is some. Any other electronic guage is gonna read a relative amount of voltage and convert it to the correct value. Screwed up voltage into the sensor will lead to screwed up info out of it. Fix the battery issue first.
. Its been a long journey with this engine swap. Learned to many things the hard way! Not to mention the expensive way. Wish I found this site long before I attempted this treat.
I'll follow up with the results. I know that all the threads I read without conclusions didn't end up with the trucks just going to the junkyard.
Thread Starter
|
Junior User
Joined: Jun 2008
Posts: 82
Likes: 0
Just thinking... Could I just use a pillar gauge set up? Or secondary gauges to 1: test the sensors and 2: have accurate readings. Its stock but the original engine melted down on one bank only. I think I need at least an accurate collent temp and EGTs on each side wouldn't hurt.
Senior User
Joined: Jun 2007
Posts: 114
Likes: 0
From: Yahk BC
Last month my gauges jumped around then went dead then back on then dead etc...My alt. went south, the brushes were just touching the armiture causing voltage spikes. (I think)
I had working gauges, radio, power windows, etc... at idle, but as soon as I was off idle they went dead. I drove home like that dead.
Check ground wires and voltage across the battery, it maybe an oman to a bigger problem..
Colin
I had working gauges, radio, power windows, etc... at idle, but as soon as I was off idle they went dead. I drove home like that dead.
Check ground wires and voltage across the battery, it maybe an oman to a bigger problem..
Colin