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#835351 - Thu Mar 15 2012 02:11 AM Re: Climbing Hills? [Re: Lucille]  
48jock  Offline
New Guy
Joined: Oct 2010
Posts: 20
Bombay, New York
I had a problem with my truck and no power. I checked the timing and changed the fuel pump with no change. It wound up being the ethanol gas. I put the additive in the tank and fixed the problem.



#835369 - Thu Mar 15 2012 03:02 AM Re: Climbing Hills? [Re: 48jock]  
don stocker  Offline
Shop Shark
Joined: Nov 2006
Posts: 2,693
osceola, wi
Thinking you have a intake manifold gasket leaking?


#835447 - Thu Mar 15 2012 01:08 PM Re: Climbing Hills? [Re: Lucille]  
Kurt_51carryall  Offline
Shop Shark
Joined: Aug 2011
Posts: 889
Raleigh,NC
You might try plugging the wiper port, check the vacuum, and then plug the port going to the vacuum advance, and check the vacuum.

Kurt


#835544 - Thu Mar 15 2012 06:43 PM Re: Climbing Hills? [Re: Kurt_51carryall]  
Lucille  Offline
Shop Shark
Joined: Oct 2007
Posts: 514
Murphy, NC
This morning I made an adjustment to the left rear brake pads ( the old hucks). When I had them relined I think the new pads were us a bit too thick. I have very little room for ajustment inwards. Guess I'll just have to wear them in a bit.

On another point I noticed that since I installed the new fuel pump my see thru fuel filter ahead of the carb is totally full of gas. That was never the case before! Maybe I won one battle....

Also this morning I hooked up my vacuum gage and tac so that they are on the inside of the cab.

OK, time to see how things are running!

Time is 11:52 - Start cold engine.
Choke all the way out and then quickly back in to about a 1" after she is running.
Vacuum 19"
RPM 1150
Temp Ambient 67degrees

After one minute slowly pushed choke to about a 1/2" out.
Vacuum 15-16"
RPM 475
Temp <100 degrees

Time is 11:56
Pushed the choke in all the way.
Vacuum 15-16"
RPM 600
Temp 130

Time is 12:00
Vacuum 16-16.5"
RPM 650
Temp 140

Time is 12:05
Vacuum is 17-17.5"
RPM 700
Temp 160

Ride time up the hill in my development.
Time 12:07
Went up hill in second gear. Vacuum drops to 6". Drove through the development and noticed that as I shifted gears the vacuum would drop to 6" (sometimes 0") and then climb to 22". Needle was all over the place.

To be honest with all you folks out there, I don't have a clue about what I am looking at!! Can some explain to me in laymans terms just what this engine vacuum means? Are the fluctuations I'm seeing normal or is it telling me something that is wrong? Its not only vacuum but timing and carburation. What would be the logical approach to getting these under control? Step one...step two...etc.

BTW, when I got back home (only drove her about a mile) I saw that the fuel filter was half empty. I think it will recharge itself after cool down. The other thing I noticed was what appeared to be gas on the outside of the carb. That kind of bother me. I surely don't want an engine fire!

Oh, you know what I just thought as I write this? I haven't checked the vacuum line from the dizzy to the carb. Gotta do that. And also Lucille is being run by a 216. Just an FYI in case no one knew.

I'm exhausted over here!!

Will the "Truck Gods" please help me??


"Lucille" ..... Proud Member of the "Southern Stovebolts"

David Wolff
1946 Chevy 1/2-ton
In the Gallery
http://s1145.photobucket.com/albums/o510/Wolffman26/

#835551 - Thu Mar 15 2012 06:58 PM Re: Climbing Hills? [Re: Lucille]  
CASO  Offline
Shop Shark
Joined: Jun 2011
Posts: 2,007
Warrenton, Oregon
The Vac drop when the throttle opens is normal thumbs_up and then it finds it's new equilibrium so to speak.
Your numbers are more like I would expect, and you should find out about the moisture on the carb... mop it with a kleenex and take it out side and put a match to it... If it poofs you know it isn't water!!!

You didn't really mention how the truck ran up the hill and that's really why I'm writing cause like others watching I want to know if it's any better!


Give me ambiguity
or give me something else

#835554 - Thu Mar 15 2012 07:04 PM Re: Climbing Hills? [Re: Lucille]  
CASO  Offline
Shop Shark
Joined: Jun 2011
Posts: 2,007
Warrenton, Oregon
Originally Posted By Lucille
as I shifted gears the vacuum would drop to 6" (sometimes 0") and then climb to 22". Needle was all over the place.

To be honest with all you folks out there, I don't have a clue about what I am looking at!!


check this out
Using a Vac Gauge and what it means


Give me ambiguity
or give me something else

#835555 - Thu Mar 15 2012 07:07 PM Re: Climbing Hills? [Re: CASO]  
jomichael  Offline
Shop Shark
Joined: Jul 2005
Posts: 1,045
Vero Beach, Florida
Have you tried putting it 4 wheel drive? Works for me.

Seriously, if you have gas on the outside of the carb, you may have found your problem. How new is your fuel pump?


#835558 - Thu Mar 15 2012 07:10 PM Re: Climbing Hills? [Re: Lucille]  
DADS50  Offline
Shop Shark
Joined: Jan 2010
Posts: 4,354
Nevada
Originally Posted By Lucille
Time is 11:56
Pushed the choke in all the way.
Vacuum 15-16"
RPM 600
Temp 130

Sounds like you have your fuel delivery issue solved. Thats good

your vacuum reading looks low.
I believe your fast idle should be set at 450 to 500 rmp once the engine is warm.(check your manual)

your vacuum reading should be between 17-21 at that rpm.

Have you put a timing light on it?






#835559 - Thu Mar 15 2012 07:16 PM Re: Climbing Hills? [Re: DADS50]  
CASO  Offline
Shop Shark
Joined: Jun 2011
Posts: 2,007
Warrenton, Oregon
Originally Posted By DADS50
Have you put a timing light on it?

IIRC it was last set @ 6 BTDC


Give me ambiguity
or give me something else

#835565 - Thu Mar 15 2012 07:53 PM Re: Climbing Hills? [Re: CASO]  
Lucille  Offline
Shop Shark
Joined: Oct 2007
Posts: 514
Murphy, NC
CASO,
I just ran up on hill in my neighborhood. All I had on my mind was reading the gages. I didn't take her out on the run I did yesterday (8 miles). So, your right, I don't know if its better. Will do that now! Also, no I haven't put a timing light on her. Will try and do that later.


"Lucille" ..... Proud Member of the "Southern Stovebolts"

David Wolff
1946 Chevy 1/2-ton
In the Gallery
http://s1145.photobucket.com/albums/o510/Wolffman26/

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