Carter carb problems - Moparts Forums

Register Log In Moparts Forums Moparts Question and Answer Carter carb problems

Print Thread

Carter carb problems #768065 08/07/10 10:15 PM 08/07/10 10:15 PM
Joined: Apr 2003 Posts: 309 S.e. lower MIch.. 66droptop OP enthusiast
66droptop OP enthusiast Joined: Apr 2003 Posts: 309 S.e. lower MIch..	1966 coronet stock 318 with a 2barrel carter bbd. The car has newer plugs, wires, cap, rotor.On acceleration if the gas pedal is slightly pushed,the car hesitates bad but will catch as more gas is given.Sometimes it will stall.If I punch it from a standstill I can catch some rubber and seems to be no hesitation. The carb was recently taken apart to put on the 2 gaskets that seperates the top from the bottom.The floats looked fine,but I did put in a new needle and seat as I lost the old one. Also,I should be getting 17-19 mpg at leats.I am getting mabey 10-12.....

Re: Carter carb problems [Re: 66droptop] #768066 08/08/10 12:13 AM 08/08/10 12:13 AM
Joined: Jan 2003 Posts: 14,610 Not2farfromNashville, TN R Rug_Trucker I Live Here
Rug_Trucker I Live Here R Joined: Jan 2003 Posts: 14,610 Not2farfromNashville, TN	These old carbs don't get any love here. I am curious if you have 2 gaskets between the top and the bowl? Is the throttle shaft loose? The tops warp like crazy on these carbs. Mine take a ride on the belt sander to true them up. Bowl too. I have a few of these carbs and I have rebuilt a '65 model for my slant. I don't think there is any adjustment on the metering rods. The later BBD's (76 and newer IIRC) did. You may have to go to www.slantsix.org for people that know these carbs. "The only thing to do for triumph of evil is for good men to do nothing" "NUNQUAM NON PARATUS!"

Re: Carter carb problems [Re: 66droptop] #768067 08/08/10 03:28 AM 08/08/10 03:28 AM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	What's the accel pump squirt look like? when did it start hesitating? any changes done right before it started? live every 24 hour block of time like it's your last day on earth

Re: Carter carb problems [Re: RapidRobert] #768068 08/08/10 08:41 AM 08/08/10 08:41 AM
Joined: Apr 2003 Posts: 309 S.e. lower MIch.. 66droptop OP enthusiast
66droptop OP enthusiast Joined: Apr 2003 Posts: 309 S.e. lower MIch..	There is only one gasket between the top bowl and the middle section.The shaft is tight. I put a new acc.pump in there and there are 2 squirts that come out that look good.It started hesitating after I replaced the gaskets,pump and needle and seat. Also,I have to turn the idle mixture screws out 3 full turns before it runs better..

Re: Carter carb problems [Re: 66droptop] #768069 08/08/10 10:42 AM 08/08/10 10:42 AM
Joined: Sep 2007 Posts: 14,889 up yours Supercuda About to go away
Supercuda About to go away Joined: Sep 2007 Posts: 14,889 up yours	Sometimes carb kits come with more than one set of gaskets in them. This is so they can cover more years with less part numbers. What this means is that you may have installed the wrong gasket and are possible blocking something. Another possibility is that your transfer slot is plugged, possibly when you scraped the old gasket off? From your description is sounds like under mild acceleration you get a hesitation, this is transfer slot territory, not accelerator pump territory. Your mileage is most likely being affected by the 3 turns out on the idle screws. I would blow out the transfer circuit and readjust the idle screws. They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.

Re: Carter carb problems [Re: 66droptop] #768070 08/08/10 11:15 AM 08/08/10 11:15 AM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	Quote: It started hesitating after I replaced the gaskets,pump and needle and seat. Also,I have to turn the idle mixture screws out 3 full turns before it runs better.. Open it up & a good visual to find what went wrong. The gaskets, compare the new to the old/some have to go on one way (top/bottom) and the 3 turns is it making up for the vac leak. Does it squirt immediately when you barely touch the throttle (& clarify on the 2 squirts) EDIT did you mean it has enough gas for 2 good squirts then just a dribble? Check the float level Last edited by RapidRobert; 08/08/10 11:28 AM. live every 24 hour block of time like it's your last day on earth

Re: Carter carb problems [Re: RapidRobert] #768071 08/11/10 08:57 PM 08/11/10 08:57 PM
Joined: Apr 2003 Posts: 309 S.e. lower MIch.. 66droptop OP enthusiast
66droptop OP enthusiast Joined: Apr 2003 Posts: 309 S.e. lower MIch..	I took it apart and the gaskets looked fine,like the old ones just no tears in them. I did not by a rebuild kit ,I only got the 2 gaskets and the needle and seat. The carb is very clean on the inside like I figured. Question 1:I found the seat that I had before and compared it to the new one I got.It looks the same but when I put the new needle in the old seat it went down in the seat further.So does that affect my float level with the new seat.Well i adjusted the floats but think I went to far and now I think there is too much gas. After I get the car running and turn it off I looked down the barrel and saw gas leaking into the bottom of the carb. What is the best way to measure the float.Is 1/4" when the carb is turned upside down. Also,when I took the new seat off the carb, there was no gasket there.Shoudn't there be soon kind of gasket? Last edited by 66droptop; 08/11/10 09:02 PM.

Re: Carter carb problems [Re: 66droptop] #768072 08/11/10 09:04 PM 08/11/10 09:04 PM
Joined: Jan 2008 Posts: 3,886 Lost and Spaced B bboogieart master
bboogieart master B Joined: Jan 2008 Posts: 3,886 Lost and Spaced	So does that affect my float level with the new seat yes re adjust your floats and you should be good.

Re: Carter carb problems [Re: 66droptop] #768073 08/11/10 10:44 PM 08/11/10 10:44 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	Quote: when I put the new needle in the old seat it went down in the seat further.So does that affect my float level with the new seat.What is the best way to measure the float.Is 1/4" when the carb is turned upside down. Also,when I took the new seat off the carb, there was no gasket there.Shoudn't there be soon kind of gasket? (1) yes it affects it. (2) turn carb upside down w top off/gasket in place and hold the horseshoe retainer in place and it's 1/4" to each float (dont rem if center or end of the float (2 of them connected like a wishbone) but the center crown iirc. (4) yes a gasket is needed there under the seat (make one if you have to) live every 24 hour block of time like it's your last day on earth

Re: Carter carb problems [Re: RapidRobert] #768074 08/14/10 10:18 PM 08/14/10 10:18 PM
Joined: Apr 2003 Posts: 309 S.e. lower MIch.. 66droptop OP enthusiast
66droptop OP enthusiast Joined: Apr 2003 Posts: 309 S.e. lower MIch..	Well the hesitation is gone which is very good. Still have to turn the screws out 3-3 1/2 turns to get it to idle smooth,although it still seems a little rough.Do you mean a vaccum leak in the carb or somewhere else. Also,I back into my drive and when going from the street to the drive there is a kind big incline and you need to give it a little gas,after getting over the hump if you let up on the gas it wants to stall.But give it a little gas and it is fine...Is this still a float issue??? Last edited by 66droptop; 08/14/10 10:18 PM.

Re: Carter carb problems [Re: 66droptop] #768075 08/14/10 10:29 PM 08/14/10 10:29 PM
Joined: Jan 2003 Posts: 3,318 Great White North W Wheeler Master
Wheeler Master W Joined: Jan 2003 Posts: 3,318 Great White North	Quote: Well the hesitation is gone which is very good. Still have to turn the screws out 3-3 1/2 turns to get it to idle smooth,although it still seems a little rough.Do you mean a vaccum leak in the carb or somewhere else. Also,I back into my drive and when going from the street to the drive there is a kind big incline and you need to give it a little gas,after getting over the hump if you let up on the gas it wants to stall.But give it a little gas and it is fine...Is this still a float issue??? 66droptop - Did you replace the carb base gasket by chance? It's a 1/4 inch gasket that sits in between the carb and the intake manifold. I had a similar problem years ago with a 1985 Dodge Truck (318 with Q-Jet 4bbl carb). One day, the engine didn't want to idle smooth and would stall if you let off the gas. Turned out it had a bad carb base gasket, causing a vacuum leak. I replaced the base gasket and it fixed the problem. Hope this helps - good luck.

Re: Carter carb problems [Re: Wheeler] #768076 08/14/10 10:59 PM 08/14/10 10:59 PM
Joined: Apr 2003 Posts: 309 S.e. lower MIch.. 66droptop OP enthusiast
66droptop OP enthusiast Joined: Apr 2003 Posts: 309 S.e. lower MIch..	Yes I did replace it and it still looks good.I have seen 2 types of gasket,1 with 2 small holes where the barrel openings are and 1 with just the one large oval hole.Does it matter which one I use?

Re: Carter carb problems [Re: 66droptop] #768077 08/15/10 12:46 AM 08/15/10 12:46 AM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	was it hesitating before you took the carb apart or did you open it up because of the poor mileage? Did the base gasket you used match the old one? live every 24 hour block of time like it's your last day on earth

Re: Carter carb problems [Re: RapidRobert] #768078 08/15/10 08:51 AM 08/15/10 08:51 AM
Joined: Apr 2003 Posts: 309 S.e. lower MIch.. 66droptop OP enthusiast
66droptop OP enthusiast Joined: Apr 2003 Posts: 309 S.e. lower MIch..	It started hesitating after I changed the gaskets because the top one was leaking.The base gasket was the same as the one I replaced but I don't remember if it was the same when replaced it a couple years ago.

Re: Carter carb problems [Re: 66droptop] #768079 08/18/10 06:32 PM 08/18/10 06:32 PM
Joined: Jan 2003 Posts: 14,610 Not2farfromNashville, TN R Rug_Trucker I Live Here
Rug_Trucker I Live Here R Joined: Jan 2003 Posts: 14,610 Not2farfromNashville, TN	Quote: It started hesitating after I changed the gaskets because the top one was leaking. The tops of those carbs warp (or worble may word) like crazy! Set the top on it without a gasket and look at the daylight in different gaps all around it. The top of the fuel bowl does the same thing. I plug the holes with Vaseline and staighten them on a stationary belt sander. "The only thing to do for triumph of evil is for good men to do nothing" "NUNQUAM NON PARATUS!"

Moderated by Al_Alguire, Hotwheelsjr, moparts, not_a_charger, RangerDan440, tboomer

Hop To

Powered by UBB.threads™ PHP Forum Software 7.7.1