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Discussion Starter #1
Greetings! I have a Weber on the way for 87 with stock 1300 and Headers. I have a new OEM Fuel Pump I never installed so it's going on as well. Folks at weberdirect claim fuel pressure can't be higher than 2.5 PSI! Funny the factory float and seat can take the mechanical pressure. Of course the OEM carb has a return line. So will a new mechanical pump put out too much pressure? I hate to buy the regulator and gauge only to find I don't need it.

Also any tips on the upgrade? Hell-of-alot of wires and vacuum lines to sort out!
 

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http://www.suzuki-forums.com/suzuki-jimny-sierra-samurai-forum/59121-losing-fire-intermittently-rough-trails.html

I just put a new weber on my 87 Samurai and had a few issues but got them solved. Go to the above link to see the thread and pictures of what I did to mine to resolve the issues.I thought at first mine was a fire issue because it ran to great on flat roads, but it now runs great on any terrain I have been on such as tilted to either side a considerable amount, going up and down steep inclines and on the road. Weber does make what they call the IDF Carb which is more for off roading, but it is considerably higher priced and I don't do any competition with mine, just run desert and mountain trails here in SE AZ mostly.

The other issue I was worried about because I thought it was a fire issue was the ECM, turned out I took it out as it is not needed without the stock carb. Mine even got a new tune up with cap, rotor, coil, plugs and plug wires because I thought it was a electrical problem. Oh well it needed it anyway I am sure. My REJECT (Samurai) has 124K showing on the odometer but was pulled all except about 50K of that behind a motorhome before I got it. Just goes to show one that fifty plus years of being a mechanic and owning garages does not keep us from being tricked at times.

The Weber does NOT get as much mileage on each gallon because the stock jets are bigger than the original, but has increased power and speed on the road.

I replaced my fuel pump shortly after getting the REJECT and it has a return line to the tank on the pump as well as a relief line from the float bowl on the new Weber to the charcoal cannister and I have no issues with too much pressure on mine at all. My new stock pump only puts out about 3 lbs of pressure.

Happy Four Wheeling. :cool::)
 

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Discussion Starter #3
Thanks for the feedback, I'll keep ya posted...
 

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I forgot in the earlier post, I did reset the float level in my Weber. It was set when I got it to where the bowl filled right to the top and I reset it to only fill about 2/3 full.

Happy Four Wheeling. :cool::)
 

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Yes the stock OEM pumps to much pressure for a Webber APROX 4psi.
You need a regulator and gauge.....
Jims problem was caused by float flutter , not over fueling.
 

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Discussion Starter #6
Ok thanks, I'll pick one up today! On the float flutter issue, as the bowl has that rectangular vent under the filter, why not just plug the hose fitting and do away with the vapor tank? Also someone mentioned leaks from the paper gasket between the adapters. Do ya'll recommend the a spray on coating? Brand?

Carb came in yesterday, I just finished installing a killer Air Horn under the hood! Will start stripping her down this evening and install new fuel pump first while I have the room.

Prost!
 

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While I no longer run a Zuke motor in my Samurai I am running a 5250 Holly / Webber clone on the new engine. I deleted the charcoal canister from the rig entirely with no ill effects.
I do not have to deal with smog regs where I live though.
I recommend copper plus spray on gasket sealer on paper gaskets.
 

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Discussion Starter #8
ECM and Plugs?

Had a successful weekend installing Weber with a Mr.Gasket Fuel Regulator. I pulled and abandoned all the ECM plugs from everything except the O2 Sensor, and altitude sensor on firewall. What you you guys do with all the plugs and extra wires? I already have a GM alternator with the plug adapter and taped up battery wire as I added a new 6ga. to battery.

I'd like to clean things up best I can. I'm still using the vapor canister for carb bowl vent. One problem I had was the choke to coil wire pulled out of cheap stakeon at choke, shorted and blew the fuse! Just a few minutes to figure that out, but that's why I'm leery of just bundling up a bunch of hot wires...

Thanks!
 

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Remove all un necessary wires from the harness. Plug all un used vacuum spigots.
And enjoy you're well sorted engine compartment.
 

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Well since my last post, I contacted Weber again and talked at length with a techrep there. I asked him to send me paperwork to return the carb to them as I was very disappointed with it and with the float flutter and partial flooding when off road and on inclines. He said they could do that, but then asked if I would try one more thing. He said he would send me another carb with paperwork to send the one I had back. If that didn't work then he said we will just return your money. I agreed and he said it waould be in the mail Monday when we talked.

The new carb got here today and I installed it, hit the trails and no problems at all. It was a bad carb they sent me causing the whole problem. Got it all ready to send back tomorrow morning. I have to commend Weber people because they did work very willingly with me to get this resolved and I am very happy it works well, because I was not looking forward to scouring a salvage lot for a carb and whatever else I needed to do it with. Especially since the friendly little rattlesnakes have came out of hibernation here in SE AZ now.

I am a very happy REJECT owner, my Samurai's name and decal name.

Happy Four Wheeling all. :cool::)
 

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Discussion Starter #11
I have had no trouble with my Weber, but yet to take it on a climb. Yesterday I added another hose barb to the air cleaner base-plate opposite the one for the PCV. Looped the bowl vent hose up to it so I can scrap the vapor canister. Should I just plug the line from fuel tank?

Also can I now unplug the ECM?

Thanks again for all the advice, pictures coming soon :)
 

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I don't know what year your Suzuki is, but mine is an 87 and the ECM on it is only for the carburetor, of course no one told me until I found this forum, and it does not specify in the manual what it is for. I took mine out and put it with the old carburetor for sale. Already had a couple of interest inquiries on the old carb, some people like them I guess.

Happy Four Wheeling all. :cool::)
 

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When I see posts like these, I can't help but wonder - are you guys for real? do you think these things through?

Yesterday I added another hose barb to the air cleaner base-plate opposite the one for the PCV. Looped the bowl vent hose up to it so I can scrap the vapor canister.
Do you really want the float bowl exposed to intake vacuum?
Are you aware that webers have a known issue with fuel overflowing the float bowl when at an angle?
Wouldn't that simply dump any fuel overflowing the bowl directly into the intake manifold?

Should I just plug the line from fuel tank?
Does the tank have another vent somewhere?
 

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Discussion Starter #14
Bowl is already vented inside , as Jim plugged. Easy to go back, that's why I asked :)

Have a Hoppy Weekend!
 

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I didn't plug the new carb Weber sent me to replace the first one, and it is doing great. I did however keep the plug in case it is needed in this one. I don't scrap the charcoal cannister on anything, but do sometimes reroute the hoses for it. Even though we don't have emissions tests in this country the next one over does so I hung onto the catalytic convertor and left the return from the pump to the tank as well as the line from the carb to the charcoal cannister intact, just in case I should sell to someone that has emission tests in their county.

I am currently looking for another older Samurai for a project that will take much longer and will be V8 equipped when I am finished with it. Haven't decided what engine, trans, transfer, and diffs I will use but most likely will be Mopar. Just a project in the planning stage but love the wheel base and width of the Samurai. My grandson is looking forward to the next one.
:cool::)

Happy Four Wheeling.
 

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I had to think about this one for a second. Should work fine.(As well as any webber does ) Just like a Holly 600 cfm 4bbl.
And yes plug the lines from the coal can. Your tank vents at the cap.
 
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