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  • Please Help!!!

    Ok so this might be a little long, but ive got nothing but time being that its a saturday night and im here on the computer because my yj is broken down... again. Ive had the truck in the shop on a weekly basis now and every time they do some kind of adjustment to the carb to were i just start having faith in her again and then... like i said im here writing to you guys for advice. Thing is about once a week it will start to stall over and over again and then start to backfire (which is always fun). The carb is only about 6 months old, but the mechanic told me that i might need a new one and quoted me $782.00 for the carb and install. At this point i dont know what to do because i picked this truck up as my "reliable vehicle" and it has obviously been anything but that. Sorry, btw, it is an 87 weber carb 32/36 i believe. I guess i am pretty much looking for any suggestions as to what to do with this sitch right now. I really do not want to sell the truck because i am in love with it, but i dont know what to do. I dont know if hes going to try to throw another aftermarket carb on there, or go back to the carter setup. anyways, ive gone on long enough here... sorry... but any help or advice would be very greatly appreciated!
    Thanks in advance guys,
    Mike

  • #2
    Don't go back to the original carb that would be a mistake. There are other alternatives then a Weber carb. I had a rebuilt carb from a older CJ put on mine and have heard of a Motorcraft carb being used if your state doesn't check for emmisions. You might even want to look into fuel injection. Try using the search. There has been alot of threads on this subject. Good luck.

    Comment


    • #3
      I would get a second opinion. If you have a bad carb, then maybe you should be able to return it......Maybe.......It is possible that "adjusting the carb" is compensating for something else that is at fault. Talk to people in your area to find out who is a reliable/reptuable technician that still works on older vehicles....or carb setups. sorry-not much help, but friendly advice.

      Comment


      • #4
        well i do appreciate the advice. see the thing is that i think, no im sure, that i have the worst luck in the world...lol. when i went to buy my weber, what do you know, theyre on strike in spain or something. so i had to do the ebay thing, which totally kills the return idea... trust me i wish that was an option. this is the second, actaully the third opinion on my carb situation. these guys have been nothing but helpful and came highly recommended from a mechanic i do trust. Im just curious though, someone said that the adjustments sound like the could be covering up something else that is wrong... any ideas on what that could be? I really wouldnt mind switching out some cheaper parts first and maybe finding the problem before dropping $800 on ANOTHER carb.
        i did have another idea, but tell me if im crazy or not... maybe this would work. i have a 94 grand cherokee with no title just sitting at my house would it be possible to do a swap? I imagine if it is it would be alot, but any kind of guestimate? and would it even work?
        thanks again guys,
        mike

        Comment


        • #5
          I do not know what else could be at fault, but usually you adjust the carb, then forget about it until something gets stuck/dirty...etc. did you change the fuel filter before installing the carb?

          What were you thinking of swapping with the 94 G Cherokee? The engine? I suppose that would be possible. Just remember...all electronics go with it.

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          • #6
            Backfire?

            I had this on an old Nissan Patrol a couple of years ago, and it turned out to be the plug leads. It would be fine some days, and then it would miss every other beat.

            Are all cylinders firing? Check the electric connection to distributor, coil and all plug leads (plug leads break down over time) and check that there is no water on them or around them). Check and replace (if necessary) the plugs. Make sure that you have a good voltage at the coil primary.

            The above is easy to check, and most of the parts (if required) are still a lot cheaper than a new carb.

            If the thing is backfiring, that is unburnt fuel in the exhaust system. So
            A) Too Rich (too much fuel to burn in the cylinder)
            B) Misfiring (fuel in and then straight out exhaust)
            C) Bad compression on one or more cylinders (fuel/air mix not igniting)

            I would check all of that before going any further. I agree with whitey... could be a symptom of something else at fault.

            Hope this helps
            Simon

            Comment


            • #7
              thanks again... but of course, i have one other question. ive been checking into the weber carbs and the more and more i read about them, the more i find that almost everyone has a fuel pressure regulator with them. are you guys also running fuel pressure regulators with yours? if so, what would be the recommended pressure to run at?
              as always... thanks,
              mike

              Comment


              • #8
                I think you will find about 90% of people with Weber's use a regulator-- 3 PSI. Could be alot of your problem, stock pumps push 5-7 psi. Good luck.

                Comment


                • #9
                  You'll need a fuel reulator with that weber. Should fix the problem.

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                  • #10
                    I didn't run a pressure regulator with my Weber at first and it ran fine. My fuel pump was old and might have been down in pressure anyway (if such a thing is possible). When I put on a new pump I added a regulator as well. I agree that your adjustments are probably not to blame and are just masking another problem. I would add the regulator then adjust the carb to Webers specifications. If you have the instructions that came with the carb you should be able to do this yourself (it's not as tricky as it sounds if you take your time); might save you a couple bucks over having your mechanic do it. I wouldn't even consider getting a new carb at this point.

                    Comment


                    • #11
                      ...so i took the plunge. now $875 later i have a new carb, but im now not sure of the brand. im just wondering if it would be a good idea to still run the fuel pressure regulator anyways with this new setup because i just got it back yesterday and already have stalled out twice. at this point i just really dont know where to go or what to do, so I just need some input on this so i can figure out my next move. also, where would i be able to pick one of these up? do they carry fuel pressure regulators at autozone or pepboys for example? any help is much appreciated!!!
                      Mike

                      Comment


                      • #12
                        I don't want to sound like a jerk but how could you spend that much on a new carb and not know the brand. You will need to know who makes the carb to determine weather or not you need to run a regulator (I ordered mine from Summit, by the way). It sounds to me like whoever is doing your work and giving you advice either: A. doesn't realy know what they are doing, or B. is taking you for a ride. From what I can gather by what you are telling us it might be a bit of both. My Jeep had a stalling problem similar to yours, by the sounds of things; here is what I did:

                        1. Replaced the stock carb with a Weber.
                        2. Replaced manifold gasket and replace exhaust manifold with a Borla header. (suspected vaccuum leak around the intake manifold)
                        3. Replaced timing chain and gears. (got this idea from the Haynes manuel as I recall)
                        4. Replaced ignition with D.U.I. and replaced plug wires.

                        Since I did all of these things at once I can't tell you which on actually fixed the problem but it didn't stall after that. Maybe this will give you some ideas.

                        Comment


                        • #13
                          just got off the phone with the mechanic and it is a weber. have to say i am relived to say the least. not that you guys know my area or anything, but there isnt anywhere to get a fuel pressure regulator other than sending out for one?

                          Comment


                          • #14
                            Sending out for a regulator might be your only option, however you could check online if the box stores (like Auto Zone) carry them; might save you some time and avoid shipping charges. I would try the regulator before anything else but I would still try to make sure it is dialed in according to Weber's specification then leave it alone. The only reason why I question if it is set up per instructions is the simple fact that your mechanic SHOULD have brought up the issue with the fuel pressure to you because it is mentioned in the instructions that it needs 3 psi to work right. If they ignored that did they ignore anything else (like installing a new fuel filter)? I know it sounds like I have it in for the guy but you are on carb #2 and the problem isn't fixed yet.

                            If the problem presits then you can be 99% sure that the carb isn't the cause of the problem. Frequently the carb takes the blame for other gremlins that are harder to find (however the stock carbs ARE pretty crappy and you should notice a performance gain with the Weber). I would be willing to bet, providing it still gives you problems once you get your fuel pressure squared away, that either you have a vaccuum leak, most likely around the intake manifold or you have a problem somewhere in the ignition system. I think that is what was wrong with mine, and the D.U.I. ignition system and plug wires would have fixed it.

                            Just be glad you arn't trying to solve stalling problems with fuel injection.

                            Comment


                            • #15
                              I have a holley fuel pressure regulator laying around here somewhere. its the one that webercarbsdirect.com sells, not sure if youre familiar with them or not... the guy that works there sold it to me when i got my last carb. the thing about the pressure regulator is is that it doesnt have a gauge on it or anything, so is it setup to run out of the box at 3 or do i need a gauge or something to tune it to that. im sure that all of these questions that im askin seem like newbie question, but thats because i am. sorry, and thanks for the patience....
                              mike

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