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#1 |
Registered User
![]() Join Date: Dec 2002
Location: Upper Sandusky Ohio
Posts: 72
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fuel fouling plugs in 305
i have an 86 pickup with a 305 4-barrel carb that has the electronic carb on it. i have a problem with the plugs fuel fouling when the engine is cold. when the engine is warm it fires right off(better than my moms brand new van). it is not carbon on the plugs and it has great accelleration after it starts. i can lean the carb all the way down so it barley runs and it still will foul the plugs. when it fouls them i will take them out and spray them with ether and light them to burn off residue then sandblast them. put them in and it fires right off. i dont know if it has something to do with the plugs or the ignition module not igniteing it at the right time. when i first try to start you can hear mabey 1 to 3 cylinders fireing but then after about 5 to 10 seconds they quit. sorry it is kinda long but i just want to get it fixed so i can drive it without worry.
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88 Crewcab Dually 5.9 Cummins, 5306 Eaton 6-speed, converted 4x4 w/52's up front, 90 front clip(parting out) 1986 ElCamino (needs motor) 1970 C30(future service truck for my ag-equipment repair business) 1970 CST10(parting out and partial donor for the '70 C30) 2000 GMC 1500 ext cab sb, z71, 5.3 loaded auto |
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#2 |
Registered User
Join Date: Oct 2002
Location: Phoenix, Arizona
Posts: 4,703
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When was the last time you put new plugs in it?
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* AVOID: LOPER'S PERMORANCE / LOPERSPEED.COM OF PHOENIX, AZ & COTTMAN TRANSMISSION * |
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#3 |
Registered User
![]() Join Date: Dec 2002
Location: Upper Sandusky Ohio
Posts: 72
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plugs are less than 6 months old. although i did have a problem with the whole engine flooding a few months back though due to a sticking float and it hadnt been run really at all untill a few weeks ago because i just got my licence.
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88 Crewcab Dually 5.9 Cummins, 5306 Eaton 6-speed, converted 4x4 w/52's up front, 90 front clip(parting out) 1986 ElCamino (needs motor) 1970 C30(future service truck for my ag-equipment repair business) 1970 CST10(parting out and partial donor for the '70 C30) 2000 GMC 1500 ext cab sb, z71, 5.3 loaded auto |
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#4 |
You get what you pay for
![]() Join Date: Dec 1999
Location: Cherryville, NC
Posts: 4,798
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Buy a new set of plugs and get the correct ones for your engine. I think they are too cold, as in the wrong plugs.
![]() Also, it may be time for some carb work. Add a new set of wires while you are at it. One more thing, you don't have an electronic carb. Only a dual capacity pump system, as all LE9 305's came with. That is, if your engine and carb is stock.
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Mike 1985 Chevy C-10 |
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#5 |
BAD BOW-Silverado XST
Join Date: May 2000
Location: Senior Member from Austin, TX
Posts: 6,431
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What gap size are you using?
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#6 |
Registered User
![]() Join Date: Dec 2002
Location: Upper Sandusky Ohio
Posts: 72
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ok i just got a new set of plugs today and havent put them in yet. my old plugs i was gapping them at what i was told by one of my sources(which i wont rely on now) .0035. so i did some checking and am now going to gap them at .0045. thanks for your help.
__________________
88 Crewcab Dually 5.9 Cummins, 5306 Eaton 6-speed, converted 4x4 w/52's up front, 90 front clip(parting out) 1986 ElCamino (needs motor) 1970 C30(future service truck for my ag-equipment repair business) 1970 CST10(parting out and partial donor for the '70 C30) 2000 GMC 1500 ext cab sb, z71, 5.3 loaded auto |
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