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| | | | Joined: Jan 2009 Posts: 175 Shop Shark | | Shop Shark Joined: Jan 2009 Posts: 175 | Hello all, I need some help, I have a 62 gmc with a 305 commercial in it, when I got it it would backfire and to get up on RPM's you would have to accelerate very very slow to engage the clutch to get it to go down the street, I figured it was the carburator as for the owner told me it was never touched, I had a professional rebuild the WW Stromburg and he said it was the first rebuild on it, I put it back on exactly as it came off and cleaning the intake and applying a skim layer of gasket sealer on both sides of the gasket to ensure no leaks,however the truck dose not want to run now, I have a fresh battery, I have good spark, to prime it I put about 2 shot glasses worth of fuel in it untill I knew the pot was full then used starting fluid, I am getting fuel in the carb. from the jet valves, fuel pump works, compression check has all cyl. at around 3 lbs. difference except 1 at 7 lbs. low, the dist. cap is new and so is rotor, wires are ok so are plugs ( I drove it home )but now not 1 cylinder tried to fire off so I'm stumped, any ideas? Thank you in advance for answers, Todd
Last edited by todjob2000; 12/05/2009 6:10 PM.
| | | | | Joined: Aug 2007 Posts: 1,859 Grumpy old guy playing with trucks, cars, and boats | | Grumpy old guy playing with trucks, cars, and boats Joined: Aug 2007 Posts: 1,859 | basics - check the plugs, are they fouled or wet.
If it didnt run on starting fluid, you have no spark
The problems we face today can not be addressed at the same level of intelligence we were at when we created them - Albert Einstein Or with the same level of $ - Me
| | | | | Joined: Dec 2006 Posts: 1,464 Shop Shark | | Shop Shark Joined: Dec 2006 Posts: 1,464 | He said he has good spark. So - question is - is it timed right? Check your timing while someone cranks the engine over. | | | | | Joined: Jun 2009 Posts: 42 Apprentice | | Apprentice Joined: Jun 2009 Posts: 42 | Is this the 305 V-6? Has it been rebuilt yet? It sounds like a stretched timing chain. It is causing some of the valves to not close completely before the plug fires, and may also mess with the lack of compression. Remove the distributor cap and manually turn the crank, to see how much delay [if any] there is before the rotor starts to turn. This will determine how much play is in the timing chain.
Also if we put too much gas into it, and flood the motor, we wash all the oil from the between the cylinder walls and piston rings. This causes poor or no compression, that is needed to get it to fire. Pull the dipstick and see if you can small fuel on it. If so, change the oil and filter and try again.
1965 Olds F85 wagon
1969 Olds Cutlass
1965 Falcon Van
1969 El Camino
1972 GMC 3/4T
1972 K5 Blazer
1971 C10
1976 Suburban
1978 Suburban
1930 F**d AA Stake
1989 CK3500 2WD
2000 CK3500 4WD
1953 GMC 3100
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| | | | | Joined: Mar 2009 Posts: 788 'Bolter | | 'Bolter Joined: Mar 2009 Posts: 788 | this is a double posting also under 60-66
ron | | | | | Joined: Jan 2009 Posts: 175 Shop Shark | | Shop Shark Joined: Jan 2009 Posts: 175 | Yes I was advised to post here too, I am taking down every piece of advice to get it going, all advice is greatly appriciated. | | |
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