stupid 2 barrel carb question
#450862
08/26/09 02:15 PM
08/26/09 02:15 PM
|
Joined: Mar 2005
Posts: 1,630 North Central Florida
eightlitermopar
OP
top fuel
|
OP
top fuel
Joined: Mar 2005
Posts: 1,630
North Central Florida
|
1969 dodge coronet 4 door 318 with a carter BBD 2 barrel The car was lacking power under high RPM/Full throttle and slighly cut out like it was starving for fuel.
The carb had a "remanufactured" sticker on it from 2006, but the carb looked a lot older than that.
So, I got a rebuild kit to clean it up. I took it apart and cleaned it thouroghly, got A LOT of dirt crap out of the bowls.
Careful to put it back together.
Car starts fine, revs great in park/neutral. ON THE ROAD, Now it lacks EVEN MORE POWER from half throttle up and starts missing like it's starved for gas, but it doesn't actually die...
I should have left the dirty carb alone.
So what do I do now? Take it apart and reclean it? Buy a new remanufactured carb? Any ideas? It's little things like this that drive me crazy!
thanks
eight
Mopar or no car
|
|
|
Re: stupid 2 barrel carb question
[Re: eightlitermopar]
#450863
08/26/09 02:23 PM
08/26/09 02:23 PM
|
Joined: Feb 2003
Posts: 7,595 TX , NJ , FL
WINGCARS_6970
master
|
master
Joined: Feb 2003
Posts: 7,595
TX , NJ , FL
|
Sometime they get rebuild some much they they have a internal problem.I have a few of them even rebuilt them on past owned cars .And took one of a parts car that worked great .But did you check your float level and snap in that retainer in to hold float down. leave any check balls out?What about fuel hoses at tank and at pump .Ive seen them swell the inside diameter down or split and suck air.Hows the fuel pump and pressure .And is it a new gas filter
1969 Daytona 440 L9B410772
1970 Coronet 500 383 Presently owned
1970 Superbird 440 U 166242
1970 Superbird 440 U 174597
1970 Superbird 440-6 V 179697
1970 Coronet RT 440 U 224126
1968 Road Runner 426 J 134509
1970 Daytona Replica 318 G 178701
|
|
|
Re: stupid 2 barrel carb question
[Re: WINGCARS_6970]
#450864
08/26/09 03:15 PM
08/26/09 03:15 PM
|
Joined: Oct 2003
Posts: 7,506 Az
Crizila
master
|
master
Joined: Oct 2003
Posts: 7,506
Az
|
"Take it apart and reclean it."
Fastest 300
|
|
|
Re: stupid 2 barrel carb question
[Re: mod5v]
#450867
08/26/09 07:40 PM
08/26/09 07:40 PM
|
Joined: Mar 2005
Posts: 1,630 North Central Florida
eightlitermopar
OP
top fuel
|
OP
top fuel
Joined: Mar 2005
Posts: 1,630
North Central Florida
|
I have two fuel filters, even before this rebuild.
There is one before and after the pump. The one after the pump is new within the last 500 miles.
I have a feeling that it may be the floats, but to be honest I didn't really mess with them. I have no idea it would run so crappy even after I just cleaned out/regasketed the carb.
Both check balls are in place according to size (double checked).
I thought giving a good clean and new guts could only improve performance...I guess I am learning as I go?
thanks for the input guys!
eight
Mopar or no car
|
|
|
Re: stupid 2 barrel carb question
[Re: buildanother]
#450869
08/26/09 07:53 PM
08/26/09 07:53 PM
|
Joined: Feb 2003
Posts: 7,595 TX , NJ , FL
WINGCARS_6970
master
|
master
Joined: Feb 2003
Posts: 7,595
TX , NJ , FL
|
You can get a rag and compressed air and slowly enter very slight pressure into the fuel opening .With fuel line off at fuel pump.And see how it looks and how it flows out.If you get hardly anything time to drop the tank
1969 Daytona 440 L9B410772
1970 Coronet 500 383 Presently owned
1970 Superbird 440 U 166242
1970 Superbird 440 U 174597
1970 Superbird 440-6 V 179697
1970 Coronet RT 440 U 224126
1968 Road Runner 426 J 134509
1970 Daytona Replica 318 G 178701
|
|
|
Re: stupid 2 barrel carb question
[Re: solidcam]
#450872
08/26/09 08:31 PM
08/26/09 08:31 PM
|
Joined: Feb 2003
Posts: 7,595 TX , NJ , FL
WINGCARS_6970
master
|
master
Joined: Feb 2003
Posts: 7,595
TX , NJ , FL
|
I tried to get away from that carb a few times .And get the holley replacement economaster never could find any
1969 Daytona 440 L9B410772
1970 Coronet 500 383 Presently owned
1970 Superbird 440 U 166242
1970 Superbird 440 U 174597
1970 Superbird 440-6 V 179697
1970 Coronet RT 440 U 224126
1968 Road Runner 426 J 134509
1970 Daytona Replica 318 G 178701
|
|
|
Re: stupid 2 barrel carb question
[Re: WINGCARS_6970]
#450873
08/26/09 08:57 PM
08/26/09 08:57 PM
|
Joined: Mar 2005
Posts: 1,630 North Central Florida
eightlitermopar
OP
top fuel
|
OP
top fuel
Joined: Mar 2005
Posts: 1,630
North Central Florida
|
thanks for the replies guys.
I know there are a lot of things I could do at this point. I am not ready to start dumping lots of money into this motor.
I may just end up throwing a 4 barrel on it, but then I have my exhaust to mess with etc...
Once I get the ball rolling with car projects, it is really hard to get it to stop.
I'll try another cleaning and thorough inspection... if that doesn't do it, it may be time for some bigger and better upgrades instead of tinkering with the little 2bbl.
any more thoughts?
eight
Mopar or no car
|
|
|
Re: stupid 2 barrel carb question
[Re: eightlitermopar]
#450875
08/27/09 05:26 AM
08/27/09 05:26 AM
|
Joined: Jun 2008
Posts: 10,847 Oakdale CT
gdonovan
I Live Here
|
I Live Here
Joined: Jun 2008
Posts: 10,847
Oakdale CT
|
Quote:
Car starts fine, revs great in park/neutral. ON THE ROAD, Now it lacks EVEN MORE POWER from half throttle up and starts missing like it's starved for gas, but it doesn't actually die...
As a tech my advice is this-
1) You first need to verify that your fuel pressure is not dropping off the face of the earth under load. A cheap gauge taped to the winshield during a road test will tell you lots.
2) Make sure ignition is up to snuff too.
|
|
|
Re: stupid 2 barrel carb question
[Re: Paul_Fancsali]
#450877
08/27/09 02:06 PM
08/27/09 02:06 PM
|
Joined: Mar 2005
Posts: 1,630 North Central Florida
eightlitermopar
OP
top fuel
|
OP
top fuel
Joined: Mar 2005
Posts: 1,630
North Central Florida
|
thanks for the input. I will mess with it some this weekend.
I will first check the fuel pressure and carb vaccumn, last I checked several months ago it was at 17-18 pounds of vacumn.
As far as the metering rods go...I just put them back in the way they came out...so I don't imagine it could be something like that.
I'll keep you posted. I am also going to ditch the double filter and just run one good one after the pump and see if that helps.
thanks.!
eight
Mopar or no car
|
|
|
Re: stupid 2 barrel carb question
[Re: eightlitermopar]
#450878
08/27/09 02:56 PM
08/27/09 02:56 PM
|
Joined: Jan 2003
Posts: 14,610 Not2farfromNashville, TN
Rug_Trucker
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 14,610
Not2farfromNashville, TN
|
There is little to no adjustment on the metering rods on a '69BBD. Maybe none. I can check later when I am out in the shop, I have a couple torn apart.
You didn't check your float height from what I read. Start there.
If the inlet turns while attaching the fuel line it will alter the float height, it doesn't take much.
They are great little carbs. Very-very simple!
"The only thing to do for triumph of evil is for good men to do nothing"
"NUNQUAM NON PARATUS!"
|
|
|
Re: stupid 2 barrel carb question
[Re: Rug_Trucker]
#450879
08/27/09 04:50 PM
08/27/09 04:50 PM
|
Joined: Jun 2008
Posts: 10,847 Oakdale CT
gdonovan
I Live Here
|
I Live Here
Joined: Jun 2008
Posts: 10,847
Oakdale CT
|
Quote:
They are great little carbs. Very-very simple!
I don't understand the bum rap some folks give them, I have worked on many in my 25+ years of wrenching.
The one I just pulled off my '74 worked flawless hot or old, much better than the 625 cfm 4 bbl that is on now.
|
|
|
|
|