Carb questions

[Thumpszilla]

I have a 77 model motor with 1 barrell carter yf that absolutely hates angles. I have a chance to buy a 2 barrell intake and rebuilt factory carb (I assume carter bbd) for $30. Are they any better on angles? with the yf if I get up a steep incline it floods out and dies. I really need to get rid of that issue as I almost flopped it today because of it. Please give your advice.

[Herk]

Have a YF on the 226 in my Willys. When going up a steep incline, the float chamber dumps fuel out of the bowl vent tube directly into the carb, flooding you out. Try extending the bowl vent line up into the air cleaner with a piece of rubber tubing. Experiment a bit to find the right angle.

If that doesnt help, I doubt the BBD would be a lot better, but give it a try. Or just start saving your pennies and build an EFI system.

[byson1]

258 motor? I'm suprised you are having problems with the carburetor. Those usually do pretty good if they are tuned right. It sounds like it's either running too rich and/or the float level is set too high. I would try another carburetor first. You can get rebuilt one's off ebay cheap. If you go with a 2 bbl intake and carb I would use a motorcraft 2100 series with it. They work great. The 2 bbl Carter BBD are notorius for problems-especially with the throttle shaft area wearing out. Good luck.

[Thumpszilla]

What would I get a 2100 off of? Where is the bowl vent line? Pics please?

[Herk]

Bowl vent on the YF should be a tube pointed up into the air horn at a 45 degree angle. Or at least thats how the earlier ones were. Since you have a smog era engine, it may be a 3/8 line going to the charcoal cannister. Sorry I hadn't thought about the year of your carb, so take a look at what you have. A high float level could also cause this, try lowering, but you may get a lean sag before it's low enough to help much.

Did I mention EFI yet? Megasquirt and a 4.0L head/intake swap would fix this for sure. But then you'd have to put up with a better running more fuel efficient engine.

[Thumpszilla]

Yeah me and the wife want to go fuel injection on it but money just doesn't allow for that. I was looking at fuel injection setups last night and it looks like a grand and up. I would like to find a wrangler that had the fuel injected 258 and get the stuff from that but no luck locating one yet. I don't know much about the change over to fuel injection but would like to learn what it involves with my truck.

Also there is no charcoal canister on my truck hasn't been since I owned it. I would also like to find a vacuum diagram for the 77 model 258.

[Herk]

No 258's were fuel injected. A Megasquirt computer could drive the injectors/manifold off of a 4.0. Check out www.msefi.com there should be many evenings of information absorption there. Just a thought. I had originally planned to MS my TR-6, but might do the Jeep first. Perhaps even this fall. I'll lose intrest in the whole endeavor long before it costs me $1000. In fact half that is about my upper limit.

[Thumpszilla]

Could I tee into my return line and run the vent line into it? That way when I got on angles were fuel would be coming out vent line it would just return to the tank. I am thinking if there is no pressure on the return line this would work. Your thoughts on this please. As I said before I want to go fuel injection but can't right now as money will not allow for it.

[Thumpszilla]

Come on guys I know someone knows if this will work.

[byson1]

The back pressure from fuel going to the carb. increases when the float level valve closes. This pressure and gas returns through the fuel return line so there is pressure in that line at times. I would not tee off anything to it. It serves a good purpose. I would simply put a long extended tube on the vent as previously suggested. It does not take much feul coming out the vent to flood the motor so if you made one about 6" in length and secured it on top of the carburetor that would probably be enough. I would then drive the Jeep to a spot where you previously had some problems and see if this fixes it. If it does then you could make this into a more permanent fix. If not then you obviusly need to look elswhere. Good luck.

[Thumpszilla]

Thanks I put an extension on teh vent line tonight. I ran it through the top of the breather and zip tied it to the firewall. Hos e is about 12" long and is above the carb so hopefully that will fix it. May be able to try it out in a few weeks.