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I have an 83 Scamp with the 5220 carb i believe is the correct one. i have this thing alive and running. however, barely it seems. the idle has a noticeable intermittent miss but it will stay alive. just seems to run rough. i can put it in gear and it seems to do ok, but whenever i apply load to it it wants to stall out and die. having said that, if i kind of feather the gas a little and power into it itll start to drive. light loads it does ok. but on hills it just wants to die. in park or neutral if i floor it, it kind of has a little hesitation but then shoots through the rpm no issues. of course the miss is there slightly but ill go to limit no problem. i have checked to see if the accel pump is working and im getting the drips when i throttle on. i have built many cars, and tuned megasquirt. but i am a product of my generation and have only basic knowledge of carb funtion lol. hopefully someone here can point me in a direction of known issues with these particular setups? at this point im assuming bad fuel pump. i have noticed when it is running there seems to be accumulation on top of the pump itself... but when i disconnect the fuel line, it seems to be pumping fuel in pretty strong.

i have been through a good chunk of the carb forum and haven't really ran into anything quite like my problem. closet thing i could find was people suggesting issues with the accel pump and the secondary? which i have no clue how to check both. so any knowledge and insight would be phenomenally appreciated here guys, thanks in advance !
 

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I have an 83 Scamp with the 5220 carb i believe is the correct one. i have this thing alive and running. however, barely it seems. the idle has a noticeable intermittent miss but it will stay alive. just seems to run rough. i can put it in gear and it seems to do ok, but whenever i apply load to it it wants to stall out and die. having said that, if i kind of feather the gas a little and power into it itll start to drive. light loads it does ok. but on hills it just wants to die. in park or neutral if i floor it, it kind of has a little hesitation but then shoots through the rpm no issues. of course the miss is there slightly but ill go to limit no problem. i have checked to see if the accel pump is working and im getting the drips when i throttle on. i have built many cars, and tuned megasquirt. but i am a product of my generation and have only basic knowledge of carb funtion lol. hopefully someone here can point me in a direction of known issues with these particular setups? at this point im assuming bad fuel pump. i have noticed when it is running there seems to be accumulation on top of the pump itself... but when i disconnect the fuel line, it seems to be pumping fuel in pretty strong.

i have been through a good chunk of the carb forum and haven't really ran into anything quite like my problem. closet thing i could find was people suggesting issues with the accel pump and the secondary? which i have no clue how to check both. so any knowledge and insight would be phenomenally appreciated here guys, thanks in advance !
I'll try to help in any way that I can. I have a '83 Rampage with the 5220 carb also.

You said that there is an accumulation on top of the fuel pump. Is it gasoline? If so then it must be leaking from around the seal of the pump body & lower inlet/outlet part. You should go ahead & change it out for $15. Don't forget to grease the sucker before it's installation.

But you also said that it's pumping fuel in pretty strong. Try the following:

Make sure fuel filter is new & hooked up correctly.

There might be an inline filter in the carb where the fuel line hooks up. Mine didn't have one.

Vacuum leaks can cause havoc on these carbs. Vacuum hoses ok? Is the carb & it's isolator tightened down good on top of the manifold? No issues with the EGR valve or vapor canister?

Check the air horn (top part) on the carb. Overtightening the 2 wingnuts that hold the air cleaner assy. on can warp the air horn. Mine had a slight warp to it & when I rebuilt my carb, I was able to flatten it enough where the gasket sealed it (C clamps, steel bars & sheet of sandpaper on a table top then a lot of cussing & a lot of sweating). It's cast aluminum so one needs to be careful not to break it.

If there are issues going up a hill there very well might be a problem with the float. Over time they absorb fuel & aren't as buoyant as they should be. You could try just replacing the float but I'd go ahead & get a carb rebuild kit. A 5220 being a 2 barrel isn't too difficult to do. Heck, I did it! :laugh2:

Take care of that Scamp! Not too many of them around.

Any other questions just let us know...
 

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I'll try to help in any way that I can. I have a '83 Rampage with the 5220 carb also.

You said that there is an accumulation on top of the fuel pump. Is it gasoline? If so then it must be leaking from around the seal of the pump body & lower inlet/outlet part. You should go ahead & change it out for $15. Don't forget to grease the sucker before it's installation.

But you also said that it's pumping fuel in pretty strong. Try the following:

Make sure fuel filter is new & hooked up correctly.

There might be an inline filter in the carb where the fuel line hooks up. Mine didn't have one.

Vacuum leaks can cause havoc on these carbs. Vacuum hoses ok? Is the carb & it's isolator tightened down good on top of the manifold? No issues with the EGR valve or vapor canister?

Check the air horn (top part) on the carb. Overtightening the 2 wingnuts that hold the air cleaner assy. on can warp the air horn. Mine had a slight warp to it & when I rebuilt my carb, I was able to flatten it enough where the gasket sealed it (C clamps, steel bars & sheet of sandpaper on a table top then a lot of cussing & a lot of sweating). It's cast aluminum so one needs to be careful not to break it.

If there are issues going up a hill there very well might be a problem with the float. Over time they absorb fuel & aren't as buoyant as they should be. You could try just replacing the float but I'd go ahead & get a carb rebuild kit. A 5220 being a 2 barrel isn't too difficult to do. Heck, I did it! :laugh2:

Take care of that Scamp! Not too many of them around.

Any other questions just let us know...
i appreciate the quick reply! yes it is fuel building up on top of the pump, it was already in my head to replace so i think im going to do that regardless. i have been over the vacuum system pretty thoroughly. when i first acquired the car it had about 4 lines disconnected everywhere. but i hunted down a diagram and put them where they needed to be. only to find out there was a diagram sticker on the strut tower lol... so i suppose at this point ill bust out the break cleaner and check all vacuum sources, tinker a little more and wait on that fuel pump before i tear open this carb!
 

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i appreciate the quick reply! yes it is fuel building up on top of the pump, it was already in my head to replace so i think im going to do that regardless. i have been over the vacuum system pretty thoroughly. when i first acquired the car it had about 4 lines disconnected everywhere. but i hunted down a diagram and put them where they needed to be. only to find out there was a diagram sticker on the strut tower lol... so i suppose at this point ill bust out the break cleaner and check all vacuum sources, tinker a little more and wait on that fuel pump before i tear open this carb!
You might want to also to check the choke linkage and verify that it's not sticking. A can of carb cleaner might just solve some of the issues...
 

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I have an 83 Scamp with the 5220 carb i believe is the correct one. i have this thing alive and running. however, barely it seems. the idle has a noticeable intermittent miss but it will stay alive. just seems to run rough. i can put it in gear and it seems to do ok, but whenever i apply load to it it wants to stall out and die. having said that, if i kind of feather the gas a little and power into it itll start to drive. light loads it does ok. but on hills it just wants to die. in park or neutral if i floor it, it kind of has a little hesitation but then shoots through the rpm no issues. of course the miss is there slightly but ill go to limit no problem. i have checked to see if the accel pump is working and im getting the drips when i throttle on. i have built many cars, and tuned megasquirt. but i am a product of my generation and have only basic knowledge of carb funtion lol. hopefully someone here can point me in a direction of known issues with these particular setups? at this point im assuming bad fuel pump. i have noticed when it is running there seems to be accumulation on top of the pump itself... but when i disconnect the fuel line, it seems to be pumping fuel in pretty strong.

i have been through a good chunk of the carb forum and haven't really ran into anything quite like my problem. closet thing i could find was people suggesting issues with the accel pump and the secondary? which i have no clue how to check both. so any knowledge and insight would be phenomenally appreciated here guys, thanks in advance !
The 5220 Holley Carb likely has a vacuum leak at the throttle shaft. Spray WD 40 while it's idling to confirm. Holley throttle shaft bases don't seem to be rebuildable. I bought a rebuilt one with a lifetime warranty and it wasn't any better. I bought the Weber and it ran way better. If you go with the Weber solution, use the existing jets before trying to transfer the 5220 jets over. My experience with Holley jets in the Weber created a lag before accelerating. Good luck, let me know of any other questions.
 

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I got frustrated with carburetor and vacuum tube issues on my '84 Rampage and replaced it with a Weber 36/32. So far so good.
 

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I appreciate all the replies here guys thanks! So update time. New fuel pump and filter... runs alot better! But still falls on its face trying to drive. Still have to pump it alot to get it to go anywhere. But at idle I can rev it to the moon now and it doesnt really hiccup at all. Just under load. Based on your replies it seems that a rebuild would be about pointless on this thing? But it appears the Weber option seems to be the popular choice? Can i get a link on where to buy one and what mods are needed to support it? Would buying a remanufactured oem carb not be worth it? I'm not really looking for more power. Just want to drive it and enjoy it.
 

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I appreciate all the replies here guys thanks! So update time. New fuel pump and filter... runs alot better! But still falls on its face trying to drive. Still have to pump it alot to get it to go anywhere. But at idle I can rev it to the moon now and it doesnt really hiccup at all. Just under load. Based on your replies it seems that a rebuild would be about pointless on this thing? But it appears the Weber option seems to be the popular choice? Can i get a link on where to buy one and what mods are needed to support it? Would buying a remanufactured oem carb not be worth it? I'm not really looking for more power. Just want to drive it and enjoy it.
What I've read in other posts is that the linkage will need to be altered to accept a Weber. Perhaps those that are running one can confirm this.

Have attached pages 2, 3 & 4 (Page 1 is for no start) for fuel system diagnosis out of the '83 FSM. Check through these & use a can of carb cleaner before you give up on the 5220.

Hope this helps!:smile2:
 

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a rebuild is basically a 'disassemble, clean, and reassemble' so it's def. worth it..
pretty easy and you will become intimately familiar with yur carb, and R&R'ing it

it's a bit hard to diagnose yur issues with the limited info,
but I would remove the top of the carb and check the fuel bowl for any debris..

the charcoal canisters on our cars eventually fail and pass small bits of charcoal thru the vent line into the carb bowl,
then they randomly block either the primary or secondary circuit causing all kinds of driveability issues.

everyone running a carb & charcoal can should put a cheap-o fuel filter in the vent line to prevent this.
 

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a rebuild is basically a 'disassemble, clean, and reassemble' so it's def. worth it..
pretty easy and you will become intimately familiar with yur carb, and R&R'ing it

it's a bit hard to diagnose yur issues with the limited info,
but I would remove the top of the carb and check the fuel bowl for any debris..

the charcoal canisters on our cars eventually fail and pass small bits of charcoal thru the vent line into the carb bowl,
then they randomly block either the primary or secondary circuit causing all kinds of driveability issues.

everyone running a carb & charcoal can should put a cheap-o fuel filter in the vent line to prevent this.
I agree with Detobias. The Holley 5220 isn't too hard to rebuild & you might have some carbon bits in the carb from the vapor canister. I put a generic clear fuel filter in the line that comes off the canister that goes to the carb. So far I haven't seen anything but it's good insurance after doing a carb rebuild. Check to see if your carb has a filter where the fuel inlet line screws in. However if your idle seems ok the issue might be debris in the fuel bowl and/or a clogged jet...
 
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