CDS rpms won't come up

[gimmeagig]

I have a 1999 CDS machine and recently it's been happening that when I turn on the machine the revs are very low. When I put my hand over the vacuum intake it will rev up. I do that a few times and eventually, when I let go , the machine will run as it should.
Sometimes I have to open the hood and fiddle with the pods. It does not seem like the linkeage is sticking, I think it is something inside the pod. I hear a clicking sound and then it works again.
So far I have been able to get the machine running every time, but it is getting worse.
I tried to reproduce that for my mechanic but of course when I take it there, it works perfectly.
Do I need to replace the pods? I think they have them at Napa for a lot less that Hydramaseter sells them for. Are they the same or is there a difference?

 

[Cleanworks]

Amazing, nobody has an answer for you. Where are all the CDS gurus when you need them?

 

[Lee Stockwell]

Just momentarily kink the vacuum hose to the pod, easily accessible.

Consider it a "safety feature".

 

[gimmeagig]

I've been to LPM ( my Truckmount repair place) twice now to show the mechanic what's happening, but every time I'm there the machine works perfect.
I have sprayed some electronic component lubricant into the vacuum hose that is attached to the primary pod. I followed it up with some air spray. Today the machine has worked fine.

 

[Jimmy L]

Air leak on the hose?

 

[gimmeagig]

I replaced the hoses. When the low RPMs happen I fiddle around with the linkage at the pod eventually I hear some type of clicking/snapping sound and then it's all good again. But I have not been able to reproduce that for my mechanic.

 

[Clean Response]

The pods Napa sells are the same and much cheaper. I can try swap the vac lines around. One pods brings the RMPS up and the other increase the RMP under load.
Swaping the vac lines should tell you if one is bad or not. Might have to adjust the pods a bit after swapping.

 

[Jimmy L]

Might see if there is a electronic speed control you can install. All else fails use a stick propped on the gas petal : )

 

[gimmeagig]

The pods Napa sells are the same and much cheaper. I can try swap the vac lines around. One pods brings the RMPS up and the other increase the RMP under load.
Swaping the vac lines should tell you if one is bad or not. Might have to adjust the pods a bit after swapping.

Do you know by any chance what the Napa part number might be? I don't know if there are different types of pods with different ratings, or if they are all the same

 

[gimmeagig]

Might see if there is a electronic speed control you can install. All else fails use a stick propped on the gas petal : )

I have a stick that I have cut to the right length for that purpose in my van already, just in case. Haven't needed it yet, but you never know....I hate these intermittent problems.

 

[Clean Response]

i just know it is a vac pod they use on old cars for cruise control. I am pretty sure if they search for vac pods they should be able to find it. I think they only make one.

 

[gimmeagig]

here's the latest..Since I sprayed lube into the vac line , the machine acts a little differently. Now it starts out on a really low idle but within 15 to 30 seconds of running like that the idle will come up to normal without me doing anything. I can live with that.

 

[Doug Rice]

I bought BWD VC433 at my local O'rielly Auto Parts. I think that might be Borg Warner

 

[gimmeagig]

I bought BWD VC433 at my local O'rielly Auto Parts. I think that might be Borg Warner

Thanks, I'll check with them tomorrow.

 

[Doug Rice]

Brad, if you have a hydramaster CDS check the little blue solenoid that has 2 wires and a vacuum line going into it. It's right in front of the pods and about 1" cube. Make sure you have a good connection on those 2 wires.