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Air/fuel on '76 Civic (yes 1976..not a typo)


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02-24-03, 08:11 AM   #1  
short_circutz
Air/fuel on '76 Civic (yes 1976..not a typo)

Not sure if anyone could help or have any sugestions but I have a 1976 Civic, 1200cc engine.

It started giving me problems with fuel consumption. Upon examining the carburetor, I discovered that at some point in the past, someone had reefed on the mixture screw, thus damaging the throat of the carb.

I replaced it with the carb off of a '78 Civic 1200, alas, the same issues, and it appeared that no matter what I did with it, it always ran rich....A lot of flooding issues, as well as very high fuel consumption.

Any ideas....anyone???

 
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02-24-03, 08:56 AM   #2  
Joe_F
Did you rebuild the 78 carburetor? If not, start there. Also, when was the last time this vehicle was tuned up and serviced?

The 78 carburetor is likely very different than the 1976 one. I suggest you find a good 1976 proper modeled one and go back to that...rebuild it.

These carburetors are very pesky and troublesome when they get old. Not worth a wooden nickel .

 
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02-24-03, 09:20 AM   #3  
short_circutz
The 1200 was running fine, all of a sudden it started giving problems.....

Both carbs exhibited the same issue......could not seem to adjust the mixture, as a result high fuel consumption.

I bought the car with a blown headgasket.....I replaced it myself, and also changes the timing belt, points, condenser, and the coil. The engine ran flawlwssly until the issues with the induction system started.

 
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02-24-03, 09:56 AM   #4  
Joe_F
May be an inherent problem with both carburetors. How's the compression of the engine now? It may not be a fuel problem, could be an ignition/internal problem.

 
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02-24-03, 10:33 AM   #5  
short_circutz
the engne compression is fine...its a low mileage engine also. The car had only 27000 original miles when I purchased it, and still has less than 40000 on it.

I just thought I'd start looking into this now, as I will be pulling it out of the garage once the snow is gone, because I am moving.

Maybe both the carbs do have the same problem. I think I may be able to source up another.

 
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02-24-03, 01:20 PM   #6  
Joe_F
Never assume, always start with the basics. Make sure you check the compression. I have seen low mileage engines with poor compression!

 
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02-24-03, 10:02 PM   #7  
Since it was running ok with the original carb and then all of a sudden started giving you problems than I think that you have a bad float or needle and seat. I would pick up a rebuild kit and a new float and rebuild the old one and see what happens. I cant believe that it would cost you over $25 for the parts. after 25 years any float is prone to leak and pick up fuel, this makes it heavier and it will keep the needle and seat open and cause flooding. This is especially true if the float is plastic. Other options...try www.car-part.com for a used one or you might consider a rebuilt carb...dont buy a Tomco brand rebuild.

 
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02-25-03, 09:37 AM   #8  
short_circutz
Sorry for the delay in responding....

I'll probably look into a rebuilt unit. The old csarb's parts kind of got misplaced over 3 moves over the lat 3 years.

The car will be coming out of storage this spring. i just figured I'd start looking into this issue before that. Thanks for the suggestions.

Travis

 
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02-25-03, 10:28 AM   #9  
Joe_F
The '78 carburetor is a different # from Honda.

1975 and 1976 use the same carburetor, depending on whether it is a 4 speed or a "Hondamatic" (Automatic) transmission:

4 speed: 16100-634-672
HMT: 16100-639-672

There's a chance Honda still has these available or perhaps they supersede up to a newer model carburetor, but chances are the price is more than the whole vehicle could ever be worth......

I'd try to find a good 1975 or 1976 carburetor removed from whatever application you have (MT or AT) and rebuild that one with quality parts from either Honda or a reliable aftermarket source.

Go from there, check the items we mentioned earlier and let us know what you find. My neighbor had a 1973 like this, in fact, he gave me the NOS bumper he bought for it, but I recycled it. I have no use for that old stuff. LOL.

 
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02-25-03, 06:51 PM   #10  
short_circutz
Actually, other than having to do a little work around the rear fenders, and replacing the bumpers, the car is solid, and low mileage.

Hoping to have it looking something like this:



But minus the wing....

I only paid $100 for the car in the first place, it had only 27000 miles on it when I got it

 
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02-26-03, 09:45 AM   #11  
Joe_F
Yuck. LOL. For each his own though .

These cars frankly aren't worth much at all. But, if you like it, run with it .

 
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