| Popping noise/carb flooding SOLVED [message #264017] |
Sun, 12 October 2014 06:22  |
budworks521
Messages: 137
Registered: October 2013
Location: Grand Rapids MI 1974 Pain...
Karma: 4
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Finally with all the help from the community and from Dick Paterson I determined the cause of my carb acting up and my hard starts when cold. I replaced the cap and rotor due to uneven wear inside the cap and that solved the hard starts and following some advice from a GMC publication about fuel pump pressure increasing due to a plugged cannister or vapor line I simply pulled the line off the carb and plugged the port. The GMC started right up and idled fine. The carb quit leaking gas out the top gasket and pump area and the flooding conditions that were causing the popping noise as the unspent fuel burned in the intake manifold disappeared. Overall, this was an eureka moment for me!! I intend to change the oil since some gas probably made its way into the crankcase. This debacle was solved from many trial and errors generated from you helpful folks and I am grateful. Terry in WV, Dick, and others!!
1974 Painted Desert
455 upper half rebuild
constant project inexperienced mechanic
Grand Rapids Mi
Always trying to learn
[Updated on: Sun, 12 October 2014 06:24] Report message to a moderator |
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| Re: Popping noise/carb flooding SOLVED [message #264244 is a reply to message #264020] |
Tue, 14 October 2014 16:01  |
budworks521
Messages: 137
Registered: October 2013
Location: Grand Rapids MI 1974 Pain...
Karma: 4
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Senior Member |
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The article was in a GMC Motor Home publication supplied by Cinnabar back in the day. The port on the carb is located on the driver's side with a 1/4" inlet. It travels from there all the way to the cannister. I have yet to look into the cannister to investigate the filter or throw on a new fuel line grade hose to see if it was also a vacuum problem. It was a small article from a question from a reader. I suppose I could try to find the link all I did was type in vapor line and cannister/causing flooding like conditions with a carb and the link was supplied.
1974 Painted Desert
455 upper half rebuild
constant project inexperienced mechanic
Grand Rapids Mi
Always trying to learn
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| Re: Popping noise/carb flooding SOLVED [message #264252 is a reply to message #264244] |
Tue, 14 October 2014 18:21 |
budworks521
Messages: 137
Registered: October 2013
Location: Grand Rapids MI 1974 Pain...
Karma: 4
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Senior Member |
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September 1995, number 5 is the publication GMC Motorhome News, Pete Pieperson. Page 10, my symptoms were small, slight flooding but once I removed the line and plugged the port my carb quit flooding and the popping noise I was hearing in the carb was unspent fuel burning from the heat of the engine on the manifold. I have yet to look into the cannister or replace the fuel hose for proper vacuum and vapor.
1974 Painted Desert
455 upper half rebuild
constant project inexperienced mechanic
Grand Rapids Mi
Always trying to learn
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| Re: [GMCnet] Popping noise/carb flooding SOLVED [message #264262 is a reply to message #264259] |
Tue, 14 October 2014 21:37 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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Senior Member |
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wanted to look it up in the mags, you saved
now afraid to tell them
On Tue, Oct 14, 2014 at 6:02 PM, Billy Massey wrote:
> Search "canister", Gene. Or, charcoal.
>
> On Oct 14, 2014 4:22 PM, "gene Fisher" wrote:
>>
>> Do you have the date on the pub? We can look it up
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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>
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
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http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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