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| | | Forums66 Topics128,078 Posts1,056,052 Members48,433 | | 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!
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on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Oct 2011 Posts: 206 Shop Shark | | Shop Shark 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 'Bolter | | 'Bolter 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 'Bolter | | 'Bolter 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 Shop Shark | | Shop Shark 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.
| | | | | Joined: Oct 2011 Posts: 206 Shop Shark | | Shop Shark 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? | | | | | Joined: Jun 2008 Posts: 1,388 Shop Shark | | Shop Shark 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. | | | | | Joined: Oct 2011 Posts: 206 Shop Shark | | Shop Shark 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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