Knock fixed...

bjzq8

New member
Well, sort of fixed. To make a long story short, it was the CAC pump, as I was suggested a few times. To make the long story, well, long...I noticed that the vehicle launched like a bullet, but seemed to fade on the top end. In reading some other posts in the forum, it had been suggested that the CAC pump was bad. I looked at the fuse, and it was blown...putting a new fuse in didn't fix anything. So I took it apart today. The stock unit was not completely locked, but was gritty to the point that it would not have been turning.

I thought of getting a Jabsco, but didn't want to wait. So off to my local Walmart I went, and got an Atwood A500. A bit of hose-clamping and fittings later (yes, my inlet line had a kink in it) and it was in. Seemed to have a bit of trouble priming, but after waiting a bit, it took off. Well I can see what the IC was supposed to look like now...it's a veritable Niagara falls in there.

I let it warm up a bit, and took it out on my "test road." Now this certainly isn't a several-hour heat soak test, but in a roll from 40 mph or so, there was absolutely no pinging. I don't have a Datamaster (yet) so I can't tell for sure. But in any case, the seat-of-the-pants meter says vastly improved. It no longer falls on its face after 60 or so. In addition, I saw no tach flutter, although it's obviously got a cause other than the CAC pump (which I will hunt down and find.)

So I'd like to thank everyone for their input, and especially Keith455@syty.net for his wonderful how-to on replacing the stuff! Next step is going to be the removal of the metal lines and their replacement with rubber. But one thing at a time.

Bill Jenkins
1992 Typhoon #1752
 

keith455

Average Joe
Staff member
Bill,
I'd order the Jabsco now, it doesn't take long to get it and from what I've read and heard that Atwood won't last long under constant use.
I'm glad that the insturctions helped :)
 
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