| |
Click on image for the lowdown. 
====
| | | Forums66 Topics128,052 Posts1,055,771 Members48,426 | | Most Online14,466 Apr 26th, 2026 | | AD Chevy Trucks Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | |
#14071 01/01/2004 4:53 AM | Joined: Nov 2002 Posts: 394 'Bolter | | 'Bolter Joined: Nov 2002 Posts: 394 | We'll here I go again thinking my 235' is just running so good when all of a sudden, my vacuum advance just is not operating. I'm holding around 17 hg's from the line off the carb., but from idle up to about 2500 rpm's the lever is not moving what so ever, the engine want's to stumble a bit to.Could this just be a bad unit or is there something internally wrong in the distributer? :confused: | | |
#14072 01/01/2004 4:33 PM | Joined: Sep 2000 Posts: 114 Member | | Member Joined: Sep 2000 Posts: 114 | Can you turn the distributor easily by hand? The vacuum advance gets rusty and stiff over time...
Jim
Jim
| | |
#14073 01/01/2004 6:07 PM | Joined: Mar 2000 Posts: 1,177 Red dot, center of chest ... | | Red dot, center of chest ... Joined: Mar 2000 Posts: 1,177 | I believe you can disconnect the lever arm from the vacuum advance and operate it by hand. By doing that, you could test whether or not the mechanical parts of the advance are operating as expected.
You can also disconnect the vacuum hose from the advance, attach a rubber hose to it, suck through it and see if it holds a vacuum. (Or use a vacuum tester if you happen to have one handy.) | | |
#14074 01/02/2004 3:30 AM | Joined: Jun 2000 Posts: 2,773 'Bolter | | 'Bolter Joined: Jun 2000 Posts: 2,773 | Before I suck on a modulator, I gently blow into it first. That checks the diaphragm, and avoids sucking dirt into my mouth.
Fred 52 3600 69 C-10
| | |
| |
| |