Just my luck
Thread Starter
Burning Brakes
Joined: Jun 2004
Posts: 936
Likes: 0
From: Tulsa OK
Just my luck
I fiddle with the timing this weekend. Get it to the point where the engine actually dies when I turn off the key, and doesn't sound like a sick Harley when it's idling at 600 and generally sounding and running TONS better than before, and what happens? There's not enough vacuum to pull the headlights up anymore. 
I just can't win. Guess it's time to break out the gauge and start over again. *sigh*
I just can't win. Guess it's time to break out the gauge and start over again. *sigh*
Thread Starter
Burning Brakes
Joined: Jun 2004
Posts: 936
Likes: 0
From: Tulsa OK
No, it's a very much NOT stock cam. It was in the car when I bought it, so I don't know exactly which cam it is, but it's pretty lopy to begin with. All I was told was that it was a "3/4" cam.
I did find an open vacuum port on the carb when we were tuning it up and plugged it, but haven't found anything since.
I did find an open vacuum port on the carb when we were tuning it up and plugged it, but haven't found anything since.
Le Mans Master
Joined: Mar 2002
Posts: 7,456
Likes: 2
From: Coming home from Luckenbach Texas
I've suffered from low vacuum for quite a while. When I was pulling off the intake to do a head swap, I found the two bolts naer the smog ports to be VERY loose.
Gee, I wonder why I had low vacuum...?
Some people use propane
or carb cleaner to trace vacuum leaks around the carb base and intake.
Gee, I wonder why I had low vacuum...?
Some people use propane
or carb cleaner to trace vacuum leaks around the carb base and intake.
Race Director
Joined: Feb 1999
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From: Lenoir City Tennessee
Ci 6, 8 & 10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15
Originally Posted by ruby76
something at least around 800ish would be better.Corvette Stories
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Thread Starter
Burning Brakes
Joined: Jun 2004
Posts: 936
Likes: 0
From: Tulsa OK
The thing that really irritates me is I just replaced the lower seals about a month ago, and everything worked just fine until this past weekend. All of the sudden, both lights only popup around an inch or so. And other than the starter, the only thing we did was plug up a leak at the carb and fiddle with the timing. 
As for the idle speed, 600 - 650 is where it's always been set, and where the lights was working before. It does seem to lose the lope around 7 or 8, I've just never run it up any higher for one reason or another. On a side note, giving it gas doesn't seem to do anything for the lights, even when the fast-idle is kicked in at 15 or 20 grand.
I dunno.
As for the idle speed, 600 - 650 is where it's always been set, and where the lights was working before. It does seem to lose the lope around 7 or 8, I've just never run it up any higher for one reason or another. On a side note, giving it gas doesn't seem to do anything for the lights, even when the fast-idle is kicked in at 15 or 20 grand.
I dunno.
Last edited by Xakk; Feb 3, 2005 at 04:09 PM.
Drifting
Joined: Sep 2004
Posts: 1,532
Likes: 4
From: Fairview Heights Illinois, near Saint Louis MO, STL C3 Shark
Is that considered a "lope" or barely running 
If it really has a lope, it will lope at almost any speed. my bro had an engine with large enough cam, that it needed to idle at about 1200 rpm and sounded like a normal engine idling at 500.
If it really has a lope, it will lope at almost any speed. my bro had an engine with large enough cam, that it needed to idle at about 1200 rpm and sounded like a normal engine idling at 500.
Thread Starter
Burning Brakes
Joined: Jun 2004
Posts: 936
Likes: 0
From: Tulsa OK
Well hell. I'm showing 16 inches of vacuum at the intake. That should be plenty. And the relays are pulling somewhere around 10 with the switch pulled. I can hear vacuum sucking in the right canister, and if I block off that line, the left headlight will pop up. 
Now that I think about it, I pulled up the left light when I was working on the car to adjust the low beams. I'm betting I pulled it up too fast and created enough backpressure to pop the other seal. That's my theory anyway. That seal wasn't even a month old either.
Dammit.
Now that I think about it, I pulled up the left light when I was working on the car to adjust the low beams. I'm betting I pulled it up too fast and created enough backpressure to pop the other seal. That's my theory anyway. That seal wasn't even a month old either.
Dammit.
Le Mans Master
Joined: Jan 2004
Posts: 8,295
Likes: 30
From: one night in Bangkok you are never lonely
Sounds something like when I replaced everything for the vacuum system with a kit from Zip. They worked great for one week then only the left light lifted but slowly. The problem was the new shaft boot split so I put the old one on and they worked great. The new boots were very hard and dry compared with the old ones.
What did you do to get the engine to shut off when you turned off the key?
What did you do to get the engine to shut off when you turned off the key?
Thread Starter
Burning Brakes
Joined: Jun 2004
Posts: 936
Likes: 0
From: Tulsa OK
Originally Posted by Bangkok Dean
What did you do to get the engine to shut off when you turned off the key?
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
see what line your headlights are on? do they share a line with something else like the PCV valve?....does it have a check valve in it? i would examine the hose routing and see if it works it its isolated by itself.....
Thread Starter
Burning Brakes
Joined: Jun 2004
Posts: 936
Likes: 0
From: Tulsa OK
I put a gauge on the line coming off the relay. Both relays are pulling about 10 inches still, so I don't think it's a lack of vacuum. If I block off the line for the right light, the left one pops. Blocking off the left light won't pop the right one, and I can hear it sucking in the canister. I'm pretty sure I just tore the seal again. It just irks me. I just changed the seals a month or so ago.
It just irks me. I just changed the seals a month or so ago.
Safety Car
Joined: Jun 2004
Posts: 4,652
Likes: 80
From: Lakeland Florida
It looks like you found your problem. It may just be that adjusting the timing was what you knew or remember you did last before the lights failed.
But as you wrote about in your last post, when you block the right cannister, where you can hear a leak, the left light pops up.
So I think I would agree with you, that the problem is with the lights, and not your timing.
kdf
But as you wrote about in your last post, when you block the right cannister, where you can hear a leak, the left light pops up.
So I think I would agree with you, that the problem is with the lights, and not your timing.
kdf