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#860500 06/20/2012 1:00 AM
Joined: Oct 2011
Posts: 206
D
Shop Shark
Shop Shark
D Offline
Joined: Oct 2011
Posts: 206
hi guys so i have a 53 burb with a 56 235.. 12v system. at first my gal needed to be choked cause the vac ad wasent working so i changed that
.i was having fuel delivery issues due to junk in tank, i shook it out and rebuilt the carb.

still running rough

I just changed the points and condenser.

just to be sure im not having a fuel delivery prob now, im using a gas can with gas and a hose.

timing set on the circle, but shes acting like shes strving for air..I can even close the idle needle and she will still run..

i havent changed the plugs yet. they are black, but not oily

I pulled the plug wire off the #1 and its got a big orange spark, and #2 n 3 I had to put the wire right next to the fender brace to see a spark, they looked blue i think?

plugs? coil? points too wide? ( im preety sure i set them at .018
)

Joined: Nov 2005
Posts: 6,100
3
3B Offline
'Bolter
'Bolter
3 Offline
Joined: Nov 2005
Posts: 6,100
Hy drew_vigil, put a vacuum gauge on it and tell us how it behaves when idling, reving up, and closed throttle coasting down from higher r.p.m.

Joined: Oct 2006
Posts: 1,847
B
'Bolter
'Bolter
B Offline
Joined: Oct 2006
Posts: 1,847
vacuum leak? check the float level, and float drop. Check the carb again. All I know is mine ran like crap for about 3 months I changed the entire ignition system, tried 2 different carburetors, had them both apart about 300 times. Tried pertronix, 3 times I put it in and took it out (it runs better without the pertronix) checked the timing about 30 times.I even made a set up to check how much fuel pressure I had. I did have a little tiny chunk of rust in the fuel pump, I had been using an inline filter (more like a strainer) before the fuel pump, after I had changed the fuel tank,(but not the filler neck, which has to be where the little chunk of rust came from) so after some indeterminate period of time I replaced the fuel line to the pump, and as there was no place to put a filter without cutting up my new fuel line, I took it out. Some time later is when I discovered the chunk of rust in the fuel pump, that is the point at which I dug out my fuel pump with the glass bowl and a dandy screen in it then one day it just started running flawlessly. I still have no idea what was wrong, I am just glad it is. These trucks are old, maybe they just need time to heal.

Last edited by brokenhead; 06/20/2012 11:28 AM.
Joined: Oct 2011
Posts: 206
D
Shop Shark
Shop Shark
D Offline
Joined: Oct 2011
Posts: 206
lol.. NO! dont tell me you had to mess with yours for three months!i cant be down another week lol... she was running great, I was driving her 80 to 100 miles a day before the advance went out..
wouldent a vacuum leak cause it to run better when choked? Id had a vac leak at the vac advance. I kept having to drive with choke pulled.- but now she wants more air, or im thinking she dosent need more air, just more spark to ignite all the fuel

Joined: Mar 2002
Posts: 9,115
'Bolter
'Bolter
Joined: Mar 2002
Posts: 9,115
If it will idle with the mixture screw turned all the way in, it is running a way too rich. This will cause the plugs to be black.

The only way to really look at the spark is with a spare plug, connected and laying on a steel surface.

Last edited by truckernix; 06/20/2012 7:03 PM.

1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed


My Chevy Master 4 Door is on the Road!
Joined: Oct 2011
Posts: 206
D
Shop Shark
Shop Shark
D Offline
Joined: Oct 2011
Posts: 206
so i put in new plugs, gaped them .035 she running a lil better. should i change the coil as well?

Joined: Mar 2002
Posts: 9,115
'Bolter
'Bolter
Joined: Mar 2002
Posts: 9,115
Your plugs can tell you some things about how it is running, sometimes. After having been run for a while they should not be wet, oily or sooty on the insulator or gap. How does it perform on the road?


1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed


My Chevy Master 4 Door is on the Road!
Joined: Jun 2008
Posts: 1,388
M
Shop Shark
Shop Shark
M Offline
Joined: Jun 2008
Posts: 1,388
Can you post a pic of the plugs you removed Drew?

Also, as 3B says, a vacuum gauge can be a great tool for tuning up an engine.


Christopher
1950 1-Ton
"Rochester"
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1949 GMC Panel Truck
1926 Model TT Truck
Joined: Oct 2011
Posts: 206
D
Shop Shark
Shop Shark
D Offline
Joined: Oct 2011
Posts: 206
lol so i think the culprit was my jet sitting in the bowl!. Im not positive that was the ONLY prolem, i have to wait till my gal gets home so I can jump start her up cause i killed my battery trying to fire.. thanks for your help eveyone!!!


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