| |
Click on image for the lowdown. 
====
| | |
7 members (dt235sd, 3B, frogfarmer, 1955 1 Series, Bruce 1954-4100, DennisM, 1 invisible),
88
guests, and
1
robot. | | Key: Admin,
Global Mod,
Mod | | | Forums66 Topics128,074 Posts1,055,910 Members48,429 | | 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!
| | 
#60639 05/19/2006 12:40 AM | Joined: Jan 2005 Posts: 62 Wrench Fetcher | | Wrench Fetcher Joined: Jan 2005 Posts: 62 | My 53 1 ton panel--Ruby-- is making me crazy and I really need some advice and a fresh perspective on the problem.
Here is her condition:
1. 261, holley weber 2bbl, HEI.
2. just adjusted the valves
3. HEI is used, new rotor, cap; replaced pick up with one off of a unit that was working when the shaft broke so I think it is ok.
4. Ball on flywheel and pointer line up @ #1 cyl. TDC and that is where I set the timing.
5. 19" vac. @ idle.
THE PROBLEM: I had to replace my old HEI when it wore out and I can't get this new set up to run smooth; the old one did. on acceleration it is like the timing is totally off --sputtering, bogs down, no power until about 40mph when it sort of smooths out if you keep a very light foot. Pops some through the exhaust when I let off the gas. I did check for vac. leaks and fixed one at the carb but realy didn't see much improvement. At idle she holds a steady 19" and the vac. advance seems to work. I don't want to have to put her down. Anybody got any idears? I keep seeing that old Mauldin cartoon from WWII of Willie with his
.45 pointed at his jeep and I just gotta' fix her. | | |
#60640 05/19/2006 1:58 AM | Joined: Mar 2005 Posts: 1,636 'Bolter | | 'Bolter Joined: Mar 2005 Posts: 1,636 | Check the plug wires to see if a couple have been crossed. I did that a while back, took a little for me to figure out what I had done. | | |
#60641 05/19/2006 2:03 AM | Joined: Feb 2005 Posts: 469 Shop Shark | | Shop Shark Joined: Feb 2005 Posts: 469 | What wore out on the old HEI. If you still have the old dizzy compare the pick up and the mechanical, vacume advance. Make sure that you didn't get a pick up for one of the odd fire six cylinders. | | |
#60642 05/19/2006 2:57 AM | Joined: Mar 2005 Posts: 1,029 Member | | Member Joined: Mar 2005 Posts: 1,029 | Timing is not nearly advanced enough, advance at least 10 degrees. | | |
#60643 05/19/2006 3:38 AM | Joined: Jan 2005 Posts: 62 Wrench Fetcher | | Wrench Fetcher Joined: Jan 2005 Posts: 62 | Thanks, I will try all these things. People talk about advance/ retard degrees but how much in distance/space on the flywheel is a degree? | | |
#60644 05/19/2006 5:33 AM | Joined: Mar 2005 Posts: 1,029 Member | | Member Joined: Mar 2005 Posts: 1,029 | On a 12 inch flywheel it would be about a tenth of an inch per degree, or about an inch for ten degrees. Just advance the timing until it pings under load then back it off until it no longer pings. The fact that it smooths out when the centifugal advance is all in but falters if you give it much throttle (because the vacuum drops and you lose the advance due to vacuum) are good indicators of insufficient advance. | | |
#60645 05/19/2006 1:25 PM | Joined: Jan 2005 Posts: 62 Wrench Fetcher | | Wrench Fetcher Joined: Jan 2005 Posts: 62 | Thanks. I have to do an installation this morning but will try all this later today or tomorrow and will report the results. Don | | |
|
|
| |
