RDspaguy
In The Industry
Sounds to me like you could have a blockage in the cleaner itself. It should be on a regulator as mentioned, but should not need full-throttle to function. Add to that the collapsed hoses, and it all says "new cleaner" to me. At the very least, get a schematic and take it apart to check for broken parts or blockages. Wish I could offer more help, but cleaner repair is not on my resume.
Best of luck.
Best of luck.