having fuel issues
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Elder User
Joined: Jan 2006
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From: Bend, Oregon
having fuel issues
I there, I'm having trouble with fuel pump issues, or carb issues, I can't seem to figure it out. It smells awful with gas fumes, I've tried to adjust the floats and carb stuff...I'm just at a loss...I also, seem to get vapor lock on hot days when driving...any suggestions?
Postmaster
Joined: Jul 2003
Posts: 2,688
Likes: 4
From: Southern Oregon
I there, I'm having trouble with fuel pump issues, or carb issues, I can't seem to figure it out. It smells awful with gas fumes, I've tried to adjust the floats and carb stuff...I'm just at a loss...I also, seem to get vapor lock on hot days when driving...any suggestions?
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Elder User
Joined: Jan 2006
Posts: 956
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From: Bend, Oregon
hi 46 thanks for responding,
the carb has a stamp 1.08 on the left side...the floats are set at 0.465 at the low point and 0.435 I will readjust them after I remeasure. My plugs look pretty good a little sooty around the top of the threads but plug looks good, they are set at .28
the carb has a stamp 1.08 on the left side...the floats are set at 0.465 at the low point and 0.435 I will readjust them after I remeasure. My plugs look pretty good a little sooty around the top of the threads but plug looks good, they are set at .28
Postmaster
Joined: Jul 2003
Posts: 2,688
Likes: 4
From: Southern Oregon
hi 46 thanks for responding,
the carb has a stamp 1.08 on the left side...the floats are set at 0.465 at the low point and 0.435 I will readjust them after I remeasure. My plugs look pretty good a little sooty around the top of the threads but plug looks good, they are set at .28
the carb has a stamp 1.08 on the left side...the floats are set at 0.465 at the low point and 0.435 I will readjust them after I remeasure. My plugs look pretty good a little sooty around the top of the threads but plug looks good, they are set at .28
Jets?
A float level of .465/.435 may be OK. I'll try and find my list for float levels tomorrow.
A properly running plug with good A/F mixture will show little to no color on porcelain. In direct sunlight or with good flashlight, the very bottom inside of the plug should be brown. Might reset plug gap at .035.
These are some things that can cause the carb to run rich: Improperly installed power valve or use of wrong PV gasket, plugged air bleeds in the booster cluster, missing the weight and/or ball bearing in the primary booster,
improperly set automatic choke, float set too high, jets that are too large.
My 1.08 Mustang carb came with 48 primary and 56 or 57 secondary jets.
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Elder User
Joined: Jan 2006
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From: Bend, Oregon
Now I'm confused...I'm getting fuel into the glass bowl, but not into the float chamber of the carb...?is something not sucking the fuel from the fuel pump "glass bowl," tot the carb? The glass bowl is bubbling when turning over the engine
Logistics Pro
Joined: Feb 2005
Posts: 3,952
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From: Upper Left Coast
I believe the glass bowl on most fuel pumps(with integral fuel filters/clear bowls) is under suction. So if you have a loose connection, cracked fuel line etc, it'll suck air and you'll see bubbles in the bowl.
If the engine compartment is really hot and the ambient temps are HOT, that could an indication of vapor lock but summer fuels usually have lower vapor pressures than winter fuel.
If you have winter fuel in the truck, you might consider draining it and replacing with fresh fuel.
I might even try getting some NON-ethanol fuel if you can find it.
Looks like there's several in Bend.
http://pure-gas.org/index.jsp?stateprov=OR
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