Oil pressure gauge issue

[clazar]

1970 Ralley dash on a RR. Been having issues with either no oil pressure showing on the gauge or it pegs past 80 lbs. I am on the third sending unit and no change. Decided to change the gauge itself. Still nothing. I also have the RTE voltage limiter. And the wiring is 10 yr old M&H. I need some ideas.

 

[pnora]

1970 Ralley dash on a RR. Been having issues with either no oil pressure showing on the gauge or it pegs past 80 lbs. I am on the third sending unit and no change. Decided to change the gauge itself. Still nothing. I also have the RTE voltage limiter. And the wiring is 10 yr old M&H. I need some ideas.

Did you ever run it with a mechanical gauge as I suggested several times?

 

[clazar]

Did you ever run it with a mechanical gauge as I suggested several times?

I do have a mechanical gauge on it. I t reads 80 lbs at start up.

 

[pnora]

I do have a mechanical gauge on it. I t reads 80 lbs at start up.

Ok and what does it read when the factory gauge is acting up?

 

[clazar]

Ok and what does it read when the factory gauge is acting up?

The factory gauge is pretty much zero or 80. A few times the factory gauge reads 60 then drops to zero. The mechanical gauge is 80 cold & then drops to appx 40-50 when hot.

 

[pnora]

So the mechanical is showing good pressure when the factory gauge is not. As long as that is true at least the engine is not at fault. What sending units are you buying?

 

[dadsbee]

You're not buying a regular pancake style sender (for an idiot light) vs the proper can style variable for a rally cluster?

 

[pnora]

You're not buying a regular pancake style sender (for an idiot light) vs the proper can style variable for a rally cluster?

That was my thought and why I asked what was he buying.

 

[clazar]

So the mechanical is showing good pressure when the factory gauge is not. As long as that is true at least the engine is not at fault. What sending units are you buying?

I'm buying the correct ones. I know that for sure.

 

[clazar]

You're not buying a regular pancake style sender (for an idiot light) vs the proper can style variable for a rally cluster?

Definetely the correct ones.

 

[pnora]

I'm buying the correct ones. I know that for sure.

What is the part number?

 

[davek]

Definetely the correct ones.

The new oil sending units are junk,same problem on my Bee says 5 psi all the time. . I run a mechanical gauge so I know the PSI.

 

[clazar]

What is the part number?

I've been buying the last 2 of them from someone on ebay. He says they are made in the USA. But I know they are the correct ones.

 

[clazar]

Could the RTE voltage limiter be a possible problem ( 10 yrs old ). The rest of the gauges seem to work fine.

 

[pnora]

I've been buying the last 2 of them from someone on ebay. He says they are made in the USA. But I know they are the correct ones.

Ok You win.

 

[pnora]

Could the RTE voltage limiter be a possible problem ( 10 yrs old ). The rest of the gauges seem to work fine.

No.

 

[clazar]

Ok You win.

I know you are only trying to help me, but it's on the car & i can't see the part #.

 

[pnora]

I know you are only trying to help me, but it's on the car & i can't see the part #.

Post the e-bay sales link and maybe we can figure it out.

 

[clazar]

Fits Mopar Oil Pressure Sending Unit 383-340-318 Plymouth Dodge Charger Cuda GTX | eBay

 

[kiwigtx]

Fits Mopar Oil Pressure Sending Unit 383-340-318 Plymouth Dodge Charger Cuda GTX | eBay

Correct gold color plating as original from MOPAR.......Not a low quality, low price silver colored one made in twain.

Note, Teflon tape applied to threads already to prefent leaks.

Please Note,.......NOT for cars with warning light lamp or idiot light.​

...... @Kern Dog ..... "Made in twain" & prefent leaks. Sellers should be making sure they are the ones who don't sound like 'Idiot lights"

I bet that seller has saled these by the boatload.