carburetor internal corrosion - fuel?
Thread Starter
Instructor
Joined: Dec 2009
Posts: 109
Likes: 0
From: Nassau co. NY
carburetor internal corrosion - fuel?
Hi folks,
I have a problem with my 750 Holley vac sec carb on our 350 ci vette engine. Has anyone else experienced any problems with corrosion in the carb from the fuel? The car does sit for some time between seasons, but is always indoors in a climate controlled garage and gets regular doses of Fuel stabil..
Here is what I found when I disassembled it this time. This is the second time I have found this, and I get fuel from the same station that I get it for my 68 Dodge. I never , ever had any problems with that Holley carb. .
I just took it apart also to do some jet tuning, and it was as clean as a whistle. The only difference between the two is that the Dodge has the standard gold annode coating, while the vette had the polished silver look.
Any insight or others with the same issue would be appreciated.
Thanks and Happy New Year!!
Greg.
I have a problem with my 750 Holley vac sec carb on our 350 ci vette engine. Has anyone else experienced any problems with corrosion in the carb from the fuel? The car does sit for some time between seasons, but is always indoors in a climate controlled garage and gets regular doses of Fuel stabil..
Here is what I found when I disassembled it this time. This is the second time I have found this, and I get fuel from the same station that I get it for my 68 Dodge. I never , ever had any problems with that Holley carb. .
I just took it apart also to do some jet tuning, and it was as clean as a whistle. The only difference between the two is that the Dodge has the standard gold annode coating, while the vette had the polished silver look.
Any insight or others with the same issue would be appreciated.
Thanks and Happy New Year!!
Greg.
Racer
Joined: Nov 2009
Posts: 289
Likes: 0
From: Franksville Wisconsin
Yep seen that before and its from our enviromental freindly mileage killing reformulated fuel.It will absorb moisture. That fuel is a killer of aluminum alloy parts. I always go out of the way to get nonreformulated gas for winter storage.
Thread Starter
Instructor
Joined: Dec 2009
Posts: 109
Likes: 0
From: Nassau co. NY
Thanks for letting me know,
Greg.
Racer
Joined: Nov 2009
Posts: 289
Likes: 0
From: Franksville Wisconsin
At some time there was fuel that contained moisture. It seem to be hit/miss kind of thing.Fuel stabil does not hurt, but it seals the fuel and if it happed to contain small amount moisture. I would like to know more but this is what I have noticed. Just my 2 cents.
Pro
Joined: May 2003
Posts: 593
Likes: 0
From: London England
We don't have any of your weird 'green' fuels here, the only time I've seen corrosion like that is when the fuel has got contaminated by some other corrosive chemical, it's shocking that just moisture can do that 
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
I had problems with water/something nasty in the bottom gallon or so of my '72 vette gas tank, it upset the living hell out of engine operation, with FI on it, drove me nutz for some time...well, it was finally found when running the thing really low, and the bottom crap was finally sucked enough into the lines that it killed the engine....that is when I found the bad stuff....cleaned the tank, and that cured the problem for quite a while...
it has slowly come back over the last year or so, and so I now have had a locking gas cap, the only way would be that damn ethanol....
but the other vehicles are not affected, so go figger, but every once in a while their idle gets rough, then smooths out again, for some reason the vette acts much worse....but even it will smooth out a bit too....it's in the gasoline, beleive me, I would drain the tank, curious to know what you find when you pour that last gallon or so into a clear glass, I bet it looks like watered down coffee with milk in it....and smell like *** too....surely don't smell gas, smells like ***....
OP, if you do this, please PM me with what you find, highly curious, as it's been a bug for a long time now....don't want to miss any thread...
thanks...
it has slowly come back over the last year or so, and so I now have had a locking gas cap, the only way would be that damn ethanol....
but the other vehicles are not affected, so go figger, but every once in a while their idle gets rough, then smooths out again, for some reason the vette acts much worse....but even it will smooth out a bit too....it's in the gasoline, beleive me, I would drain the tank, curious to know what you find when you pour that last gallon or so into a clear glass, I bet it looks like watered down coffee with milk in it....and smell like *** too....surely don't smell gas, smells like ***....
OP, if you do this, please PM me with what you find, highly curious, as it's been a bug for a long time now....don't want to miss any thread...
thanks...
Thread Starter
Instructor
Joined: Dec 2009
Posts: 109
Likes: 0
From: Nassau co. NY
I had problems with water/something nasty in the bottom gallon or so of my '72 vette gas tank, it upset the living hell out of engine operation, with FI on it, drove me nutz for some time...well, it was finally found when running the thing really low, and the bottom crap was finally sucked enough into the lines that it killed the engine....that is when I found the bad stuff....cleaned the tank, and that cured the problem for quite a while...
it has slowly come back over the last year or so, and so I now have had a locking gas cap, the only way would be that damn ethanol....
but the other vehicles are not affected, so go figger, but every once in a while their idle gets rough, then smooths out again, for some reason the vette acts much worse....but even it will smooth out a bit too....it's in the gasoline, beleive me, I would drain the tank, curious to know what you find when you pour that last gallon or so into a clear glass, I bet it looks like watered down coffee with milk in it....and smell like *** too....surely don't smell gas, smells like ***....
OP, if you do this, please PM me with what you find, highly curious, as it's been a bug for a long time now....don't want to miss any thread...
thanks...
it has slowly come back over the last year or so, and so I now have had a locking gas cap, the only way would be that damn ethanol....
but the other vehicles are not affected, so go figger, but every once in a while their idle gets rough, then smooths out again, for some reason the vette acts much worse....but even it will smooth out a bit too....it's in the gasoline, beleive me, I would drain the tank, curious to know what you find when you pour that last gallon or so into a clear glass, I bet it looks like watered down coffee with milk in it....and smell like *** too....surely don't smell gas, smells like ***....
OP, if you do this, please PM me with what you find, highly curious, as it's been a bug for a long time now....don't want to miss any thread...
thanks...
While it is out, I will flush it, and the lines. I'll replace whatever I have to based on what I find.
Thanks for the replies,
Greg.
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Thread Starter
Instructor
Joined: Dec 2009
Posts: 109
Likes: 0
From: Nassau co. NY
Greg.
Safety Car
Joined: May 2008
Posts: 3,755
Likes: 721
From: Lafayette Louisiana
ethanol in gasoline
Outboard motor folks are really exercised about ethanol in the gasoline due to the effects described above. Outboard motor gas tanks breath in lots of moisture due to the nature of the usage and have less turnover in the gas tank. There are websites where you can find the local gasoline stations that still sell 100% gasoline. Check the marine sites if needed. I plan to start putting only 100% gas in the 76 and the boat asap. Ethanol containing gas will only go into the daily drivers for me.
Racer
Joined: May 2006
Posts: 264
Likes: 0
From: Fort Myers, Fl / St. Paul, Mn
The situation that I have, or had, is when I wash the car the drain around the fuel cap was plugged and the well would fill with water. When the car was put back in the garage and cooled, water would be theoretically drawn into the tank. Over a few months time that few ounces adds up. I should have replace the drain hose but instead I blew it out with an air gun. It now drains good but I haven't driven it much since. The stuff in your pictures look just like what I had only worse. My car is driven daily so the crap didn't have a chance to settle as much as yours.
Gas for all 4 of my cars comes from the same station.
Good luck
Gas for all 4 of my cars comes from the same station.
Good luck
Tech Contributor
Joined: Aug 1999
Posts: 14,382
Likes: 6,401
From: At my Bar drinking and wrenching in Lafayette Colorado
Your problem has nothing to do with ethanol, Stabil, moisture, or anything that the previous posters have suggested.
Holley had a bad batch of carbs with bad plating, which has caused the carbs to erode internally. They are honoring warranty on these carbs, and they will give you a new carb. Call the Holley tech line and let them know that you have one of the carbs with the internal errosion/corrosion problems and they will exchange your carb.
Ignore the suggestions by the previous posters - you have a bad carb - I've seen a bunch of them, and Holley is replacing them.
Lars
Holley had a bad batch of carbs with bad plating, which has caused the carbs to erode internally. They are honoring warranty on these carbs, and they will give you a new carb. Call the Holley tech line and let them know that you have one of the carbs with the internal errosion/corrosion problems and they will exchange your carb.
Ignore the suggestions by the previous posters - you have a bad carb - I've seen a bunch of them, and Holley is replacing them.
Lars
Racer
Joined: May 2006
Posts: 264
Likes: 0
From: Fort Myers, Fl / St. Paul, Mn
Your problem has nothing to do with ethanol, Stabil, moisture, or anything that the previous posters have suggested.
Holley had a bad batch of carbs with bad plating, which has caused the carbs to erode internally. They are honoring warranty on these carbs, and they will give you a new carb. Call the Holley tech line and let them know that you have one of the carbs with the internal errosion/corrosion problems and they will exchange your carb.
Ignore the suggestions by the previous posters - you have a bad carb - I've seen a bunch of them, and Holley is replacing them.
Lars
Holley had a bad batch of carbs with bad plating, which has caused the carbs to erode internally. They are honoring warranty on these carbs, and they will give you a new carb. Call the Holley tech line and let them know that you have one of the carbs with the internal errosion/corrosion problems and they will exchange your carb.
Ignore the suggestions by the previous posters - you have a bad carb - I've seen a bunch of them, and Holley is replacing them.
Lars
The OP's photos show red corrosion - is there something inside a carb that oxidizes red.
Thread Starter
Instructor
Joined: Dec 2009
Posts: 109
Likes: 0
From: Nassau co. NY
Your problem has nothing to do with ethanol, Stabil, moisture, or anything that the previous posters have suggested.
Holley had a bad batch of carbs with bad plating, which has caused the carbs to erode internally. They are honoring warranty on these carbs, and they will give you a new carb. Call the Holley tech line and let them know that you have one of the carbs with the internal errosion/corrosion problems and they will exchange your carb.
Ignore the suggestions by the previous posters - you have a bad carb - I've seen a bunch of them, and Holley is replacing them.
Lars
Holley had a bad batch of carbs with bad plating, which has caused the carbs to erode internally. They are honoring warranty on these carbs, and they will give you a new carb. Call the Holley tech line and let them know that you have one of the carbs with the internal errosion/corrosion problems and they will exchange your carb.
Ignore the suggestions by the previous posters - you have a bad carb - I've seen a bunch of them, and Holley is replacing them.
Lars
Greg.
Racer
Joined: Nov 2004
Posts: 485
Likes: 1
From: Oakville ON
rust
No. You have rust sediment. Forgret about ethanol. Sh*it in the tank or your distubributor.
Thread Starter
Instructor
Joined: Dec 2009
Posts: 109
Likes: 0
From: Nassau co. NY
I called Holley tech today, and after giving them my list # and date codes, they told me that my carb was not in the batch of "bad Plating" that would cause this. They said it MUST be something in the tank that caused this. I will be draining the whole system and flushing it out.
Greg.,