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11-15-2013, 01:49 AM
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#1 |
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Registered User
Join Date: Aug 2013
Location: waynesville georgia
Posts: 164
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little issue
when i get in to gas hard it starts busting out is that most likely my points and whats the best way to adjust
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11-15-2013, 03:17 AM
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#2 |
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Senior Member
 
Join Date: Feb 2001
Location: New Madison, Ohio
Posts: 21,373
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Re: little issue
Ttt
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A husband can be right...or...A husband can be happy.  67-72 Chevy and GMC Trucks...The Classic Truck for the Classic Folk.  1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc   JOHN 17:3...The better side of "LIFE" Remember: Everyday is a good day...Some are just gooder! |
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11-15-2013, 09:41 AM
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#3 |
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I am a Referee of life.
Join Date: Jun 2000
Location: Greensboro N.C.
Posts: 13,992
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Re: little issue
Best fix?Get rid of the points.Install a HEI and let er rip!!
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The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil" |
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11-15-2013, 01:06 PM
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#4 |
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Registered User
Join Date: Oct 2013
Location: Rt 66 Gallup, NM
Posts: 527
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Re: little issue
Could be points, could be coil, could be plug wires, could be fuel filter or something else. What do you mean by busting out? I picture the engine escaping through the hood. Is the problem in the middle RPM range or higher? Does it only happen at wide open throttle or half throttle?
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2005 GMC K2500HD D/A 1993 GMC K1500 2011 Subaru Legacy. 2013 Subaru Outback 1970 C-10 2WD, SWB stepside, 292, TH350, PS, more rust than anything. God is my pilot. 
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11-15-2013, 02:45 PM
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#5 |
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Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: little issue
If I knew what "Busting Out" means I'd be able to give a better answer. If you mean backfiring and stuff, could be ignition, valves, timing chain, or a number of things.
If you mean it bogs and falls over until it recovers, probably accelerator pump, like a ripped diaphragm. Or you're missing some of the original drivability pieces like the heat riser, heat stove, heat crossover, enclosed air cleaner with snorkel, etc... all that stuff was there not for emissions (usually) but to prevent bogging and stumbles when cold. Either way, if the vehicle or its reliability is at all important, it's time for a tuneup. Stick a Pertronix or cheaper module into the distributor to get rid of the points. New plugs, wires, PCV, etc. And it if its not perfect after that, check compression. If that looks ok, check leakdown.
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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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11-20-2013, 11:00 AM
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#6 |
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Registered User
Join Date: Aug 2013
Location: waynesville georgia
Posts: 164
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Re: little issue
when i am running at higher rpms and punch the gas it dont take off it it start popping but not back firing its got new coil, plug wires ,fuel filter ,gas tank ,fuel pump
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11-20-2013, 01:08 PM
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#7 |
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Senior Member
 
Join Date: Mar 2012
Location: Chesapeake, Va
Posts: 1,275
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Re: little issue
i had a bad set of plugs once that caused popping out the carb at higher RPMS, they were brand new, pulled them out and put in another set, fixed the problem,
i would also make sure your choke is opening all the way and not closing
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Mike 72 C-10 Cheyenne off frame resto and Upgraded to 4 wheel disk, Tilt, Dakota Digital Dash / Rear slider. 421 SBC / TH350 3000RPM Stall Progression Ignition /Holley 750 DP/3:73 gear Eaton Limited Slip unit / 2 1/2 exhaust glasspacks 
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11-20-2013, 02:27 PM
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#8 | |
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Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: little issue
Quote:
Just be glad its not supercharged. I've chased too many "spark cannot cross the gap at more than 12psi because of increased air density" issues in my life to know it can be finicky. Does it start popping immediately when you floor it, or only once the revs come up under that load? Anything weak in the ignition system can cause a breakup once the cylinder pressures come up, as they will when you go to WOT. Another things to check would be to run it somewhere completely dark, with no lights on at all (ideally outside so you don't gas yourself). If its dark enough you can usually track down arcing (plug to manifold, wire to heat riser tube, whatever) to rule that out as well. Again, do NOT run your vehicle inside a closed building. Carbon monoxide is poisonous and deadly.
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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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11-21-2013, 11:47 PM
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#9 |
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Registered User
Join Date: Aug 2013
Location: waynesville georgia
Posts: 164
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Re: little issue
its got new cap and rotor button also putting timing light on it tomorrow it like a hesitation when popping dont lose speed it like its not got the spark or gas one of two to pick up anymore speed
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11-22-2013, 12:08 AM
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#10 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,736
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Re: little issue
Pop the valve covers off and crank it over without starting it and watch the rockers.
You could have a flat lobe on your cam. |
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