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  • #1

    Weber choke issues help

    My Weber has not been running well with the cold weather. Chokes, for some reason are "mysterious" to me ...somewhat.
    Car is down in MPG's, and after running on the highway, and getting off at an exit, rpm's drop WAY down, and the car wants to die. After a few minutes of running on street speeds, it starts to run more normally.
    Doing a little troubleshooting, I have (with engine off) kicked the throttle and watched the choke flaps shut as they should, and watched the flaps open as it warms. (good operation)
    I checked voltage to the choke, and am only getting 7.11/7.12 volts at choke wire. Choke wire is still from orig, location at the alt. Should be 12V
    Anyone have any idea what is going on?
    I had orig. adjusted it in summer, at install, 1 1/2 yr ago, and all was good last winter. This just started this winter. Any help is appreciated, and Thanks in advance!

    Dan
    Last edited by drddan; 01-29-2012, 02:19 PM.
    Dan




    Red 1988 Festiva L - CUJO

    Black 1992 Festiva GL Sport - BLACK MAGIC

    I'm just...a little slow... sometimes:withstupid:

    R.I.P.
    Blue 1972 Chevelle SS-468 C.I.D. B'nM TH400-4:56 posi-Black racing stripes-Black vinyl top-Black int.
    Black on black 1976 Camaro LT-350 4 bolt main .060 over
    Silver 1988 Festiva L

    My Music!
    http://www.reverbnation.com/main/sea...t_songs/266647
    Tags: None
  • #2
    Maybe alt is going south? Hence low volts at the wire.
    90 Festy (Larry)--B6M (Matt D. modified B6 head), header, 5-speed, Capri XR2 front brakes, many other little mods
    09 Kia Rondo--a Festy on steroids!

    You can avoid reality, but you can't avoid the consequences of avoiding reality--Ayn Rand

    Disaster preparedness

    Tragedy and Hope.....Infowars.com.....The Drudge Report.....Founding Fathers.info

    Think for yourself.....question all authority.....re-evaluate everything you think you know. Red-pill yourself!

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    • #3
      The festiva choke works off 7 volts or so but don't know about the Weber.

      Comment

      • #4
        Originally posted by georgeb View Post
        The festiva choke works off 7 volts or so but don't know about the Weber.
        7V ???? Really?

        The Weber choke requires 12V. If that is so, then the choke probably has not been working altogether properly, all along. Maybe time to find another 12V source for it.

        Originally posted by TominMO View Post
        Maybe alt is going south? Hence low volts at the wire.
        Yea, the alt is old, but everything is staying charged ....but I have been having problems with the idle rpm's dropping when turning on the headlights, and when stepping on the brakes. If I have the headlights on AND step on the brakes, the rpm's really drop off!
        Last edited by drddan; 01-29-2012, 04:09 PM.
        Dan




        Red 1988 Festiva L - CUJO

        Black 1992 Festiva GL Sport - BLACK MAGIC

        I'm just...a little slow... sometimes:withstupid:

        R.I.P.
        Blue 1972 Chevelle SS-468 C.I.D. B'nM TH400-4:56 posi-Black racing stripes-Black vinyl top-Black int.
        Black on black 1976 Camaro LT-350 4 bolt main .060 over
        Silver 1988 Festiva L

        My Music!
        http://www.reverbnation.com/main/sea...t_songs/266647

        Comment

        • #5
          Sounds like a combination of things then. The alt may still be going bad, and with the choke can't pull its weight (i.e. open fully) with only 7 volts. Apparently this only becomes a noticeable problem in colder weather. Just use another source that's known 12V when ignition is on. It doesn't need to come straight from the alt.
          Last edited by TominMO; 01-29-2012, 05:01 PM.
          90 Festy (Larry)--B6M (Matt D. modified B6 head), header, 5-speed, Capri XR2 front brakes, many other little mods
          09 Kia Rondo--a Festy on steroids!

          You can avoid reality, but you can't avoid the consequences of avoiding reality--Ayn Rand

          Disaster preparedness

          Tragedy and Hope.....Infowars.com.....The Drudge Report.....Founding Fathers.info

          Think for yourself.....question all authority.....re-evaluate everything you think you know. Red-pill yourself!

          Comment

          • #6
            Exactly what I was thinking, Tom.
            Alt bolt head is strpped (like that when I got it, someone using S.A.E. instead of Metric socket/wrench :angry4 so I have been kinda putting it off. Wanting to do the 60-70 amp alt while i'm at it.
            I went out cleaned it all up with carb cleaner (it needed cleaning badly) changed air filter and pvc. We'll see on my morning drive if that helped.
            New 12V source and the rest of the tune up tonight or tomorrow.
            Last edited by drddan; 01-29-2012, 05:55 PM.
            Dan




            Red 1988 Festiva L - CUJO

            Black 1992 Festiva GL Sport - BLACK MAGIC

            I'm just...a little slow... sometimes:withstupid:

            R.I.P.
            Blue 1972 Chevelle SS-468 C.I.D. B'nM TH400-4:56 posi-Black racing stripes-Black vinyl top-Black int.
            Black on black 1976 Camaro LT-350 4 bolt main .060 over
            Silver 1988 Festiva L

            My Music!
            http://www.reverbnation.com/main/sea...t_songs/266647

            Comment

            • #7
              http://www.fordfestiva.com/forums/sh...voltage&page=2 Here's the thread discussing the choke voltage. Nobody ever actually checked it with a meter. I attempted but connecting points were inaccessible.

              Comment

              • #8
                My emissions manual says that 7-8 volts go to the choke heater.

                Comment

                • #9
                  The voltage source only works with the key on AND the engine running.
                  Rewire for 12 volts should be this way too. For safety, add on fuel pumps
                  are also supposed to lose power should the engine die. An oil pressure
                  switch or a relay off the alternator choke terminal can do this. The OEM
                  fuel pump circuit could also be used, but add a relay so that the pump
                  circuit is not overloaded.
                  Does the plate take longer than 3 to 5 minutes to fully open?
                  Reflex paint by Langeman...Lifted...Tow Rig

                  Comment

                  • #10
                    i have the identical carb that you do. i have mine wired to the alt and it works great so i dont think it is worth your time to rewire it. check the connnection to the alt and if its good i would try a different alternator. also see if the choke plates move freely when it is not running. if they don't move freely you probably have some binding somewhere and the choke doesnt have enough power to force it open all of the way.
                    Last edited by festivafeva; 01-30-2012, 11:05 AM.

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                    • #11
                      I would run it off the coil + terminal. I don't know why the car would have to be running to heat the choke. My VWs were hooked up this way.

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                      • #12
                        Time it..3 - 5 minutes..
                        Reflex paint by Langeman...Lifted...Tow Rig

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                        • #13
                          Originally posted by georgeb View Post
                          I would run it off the coil + terminal. I don't know why the car would have to be running to heat the choke. My VWs were hooked up this way.
                          Nothing wrong with that, but practically speaking it's the same thing. No need to heat the choke unless you're gonna drive it.
                          90 Festy (Larry)--B6M (Matt D. modified B6 head), header, 5-speed, Capri XR2 front brakes, many other little mods
                          09 Kia Rondo--a Festy on steroids!

                          You can avoid reality, but you can't avoid the consequences of avoiding reality--Ayn Rand

                          Disaster preparedness

                          Tragedy and Hope.....Infowars.com.....The Drudge Report.....Founding Fathers.info

                          Think for yourself.....question all authority.....re-evaluate everything you think you know. Red-pill yourself!

                          Comment

                          • #14
                            Take the alternator into an auto parts store for a free test?
                            Original owner of silver grey carburetted 1989 Festiva. 105k km as of June 2006. 140k km as of June 2021.

                            Comment

                            • #15
                              Originally posted by georgeb View Post
                              I would run it off the coil + terminal. I don't know why the car would have to be running to heat the choke. My VWs were hooked up this way.
                              You probably don't do this but lots of others do..They run out to the car
                              and turn the key on and listen to the tunes for a bit until the next person
                              gets there, then the car won't start because the choke is fully heated
                              and open. Usually a kid waiting for mom to drive him to school..
                              Reflex paint by Langeman...Lifted...Tow Rig

                              Comment

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