Powermaster stays running

[IrvJr]

Til the fuse blows. I think thats the switch. Thought i had a spare but cant find it. Any thoughts? No suggestions about switching to vacuum or hydro boost, lets just stay on MY topic please. Thanks.

 

[TurboBob]

the switch controls the motor, assuming the motor is still ok, then its definately the switch.

I have some old switches around here, but am unsure if they are any good.

Bob

 

[IrvJr]

Would you be willing to ship a few down and let me try them out?

 

[TurboBob]

Would you be willing to ship a few down and let me try them out?

I just looked for them, unsuccessfully. I will check the garage tonight. If I find them I will send them along.

Bob

 

[1quick6]

It could also be an internal leak in the pump, but you can't really tell unless you have a pressure tester. If there is a leak, it will never let the pressure get up to the motor shut off point, which is between 550-770psi.

You can test the pressure switch with a volt meter. All terminals should have continuity with each other.

 

[IrvJr]

That will say if the electrical part of the switch is good, but what about the pressure sensing part? Thats why i wanted to try out a used switch instead of dropping 90 on a new one from Kirbans.

 

[IrvJr]

So a different switch didnt fix anything. So i bought a vacuum brake setup and im going with the s10 spindles and bigger brakes with the money i save by not buying a new PM. I will post my own thread with pics and everytihng with my progress.

 

[Ttype6]

So i bought a vacuum brake setup and im going with the s10 spindles and bigger brakes with the money i save by not buying a new PM.

I'm sure I could fix your PM. I hate to see you loose this very unique thing about your car.

 

[~JM~]

I'm sure I could fix your PM. I hate to see you loose this very unique thing about your car.

What are the advantages of mantaining the Power-Master? It looked like a long term liability to me.

~JM~

 

[IrvJr]

What are the advantages of mantaining the Power-Master? It looked like a long term liability to me.

~JM~

It works quite well and is not nearly as problematic as it is made out to be. These are 25 year old cars remember. The reason i didnt want to switch is because the vacuum brakes and hydro boost both have detractors. The vacuum not as much as the HB, which sems to be about 50/50 on the system. But i figure with the bigger rotors and brakes up front they should work well, plus my car makes pretty good vacuum and i dont race much so it should be a good swap with less maintenance in the future.

 

[IrvJr]

I'm sure I could fix your PM. I hate to see you loose this very unique thing about your car.

I think the motor is bad. How much to fix one of those?