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Thread: Diagnose this! I think she's mad at me...(the Landy)

  1. #1
    Join Date
    Apr 2021
    Location
    SF Bay Area
    Posts
    199

    Default Diagnose this! I think she's mad at me...(the Landy)

    Hello Rover-heads!

    Wouldn't you know it? Fresh off spending $800 and two weeks installing interior parts on the Landy, I go for a celebratory drive and my car is possessed. It stalls out and dies...and keeps dieing. The weekend's over, so it'll have to wait. But maybe you fine folks may have some ideas.

    The symptoms:
    * Starts perfect, when sitting. Starts within 1-2 seconds.
    * Won't accept gas until warm...gurgles and chokes on more gas pedal. Choke works great, and idle raises smoothly.
    * Can't pull away in first unless I am at about 2000rpm, and feels like it wants to stall unless I really gas it and grind the clutch, or it will stall.
    * If I keep it in lower gears too much (high rev)Rev, it will faulter and stall.
    * Then it won't start up for 2-5 minutes. If I crank the motor, no amount of cranking will start it. I have to wait.
    * Strong smell of gasoline. I feel like it's flooded. If I let it sit and evaporate for 2 minutes, it starts again.
    * It used to only happen intermittently. But today, it did this cycle about 6 times as I limped back home. Starts. Runs for 2 minutes. Stalls. Won't start for 2 minutes. Starts again. Repeat.

    Air, Fuel, Spark.
    I got all three. Then I don't.I think the first two are okay(I smell gas). So, I'm suspecting spark? For a while, I thought it might be vapor lock? But I got that little spacer between the intake and the carb(phenolic block?), and the car was kind of cold...maybe 7 minutes from cold start.

    I suspect the Land Rover needs some cash burned as an offering to excorcise these demons.

    Hit me with your ideas. I'm stumped(for now).
    ...┌───────┬──,,
    ...|______OD__|__\\_____
    ...d ..__ ......... |... | ..__....p
    └/ | \────┴──┴/ | \─┘≡
    ..../..@........................@

    1973 Series 3, 109

  2. #2
    Join Date
    Jul 2020
    Location
    UK
    Posts
    169

    Default

    Sounds rather like my Classic car when the condenser/ capacitor in the distributer went down . Also I have had this sort of issue with very poor fuel, its only happened about 4 or 5 times in 40 years but , adding fresh has solved the issue.
    Last edited by roverp480; 01-24-2022 at 12:29 PM.

  3. #3

    Default

    wHAT CARB ARE YOU RUNNING fUEL PUMP?

  4. #4
    Join Date
    Aug 2020
    Location
    chilliwack BC Canada
    Posts
    81

    Default

    I would take the carb apart and blow out all the passages with compressed air to start.

  5. #5
    Join Date
    Apr 2021
    Location
    SF Bay Area
    Posts
    199

    Default

    Quote Originally Posted by charles1943 View Post
    wHAT CARB ARE YOU RUNNING fUEL PUMP?
    Zieneth 361V carb. Looks to be original.
    Fuel pump is mechanical type with glass sediment cup there, again, looks original.
    ...┌───────┬──,,
    ...|______OD__|__\\_____
    ...d ..__ ......... |... | ..__....p
    └/ | \────┴──┴/ | \─┘≡
    ..../..@........................@

    1973 Series 3, 109

  6. #6
    Join Date
    Apr 2021
    Location
    SF Bay Area
    Posts
    199

    Default

    Quote Originally Posted by roverp480 View Post
    Sounds rather like my Classic car when the condenser/ capacitor in the distributer went down . Also I have had this sort of issue with very poor fuel, its only happened about 4 or 5 times in 40 years but , adding fresh has solved the issue.
    I had a Chevy 2500 that died the same way, too. Was driving and it just fluttered out. No voltage at the coil bolts. Replacing the distributer and coil got it back on the road. I also suspect my distributer or some component of the ignition.

    Luckily, I have a brand new electronic ignition distributer and coil in the box (I wanted to upgrade soon, so now it forces the issue). Will change that out this weekend and update.
    ...┌───────┬──,,
    ...|______OD__|__\\_____
    ...d ..__ ......... |... | ..__....p
    └/ | \────┴──┴/ | \─┘≡
    ..../..@........................@

    1973 Series 3, 109

  7. #7
    Join Date
    Apr 2021
    Location
    SF Bay Area
    Posts
    199

    Default

    Quote Originally Posted by wrongway View Post
    I would take the carb apart and blow out all the passages with compressed air to start.
    Been contemplating a carb rebuild or upgrade, soon. But, I'm paralyzed by the lack of options:

    1) The replacement carbs have a bad reputation.
    2) They don't make the Zienith 361V anymore.
    3) Don't want to replace all my linkage and stock choke cables. Looks nice and factory correct. I respect Weber as a company...so maybe this is a good option.
    4) @JimR on the forum said he had bad luck with carb rebuild kit having totally wrong gaskets inside.

    Don't want to take it all apart and find I can't get parts for it! Or rip the old gaskets and can't get proper new ones.
    ...┌───────┬──,,
    ...|______OD__|__\\_____
    ...d ..__ ......... |... | ..__....p
    └/ | \────┴──┴/ | \─┘≡
    ..../..@........................@

    1973 Series 3, 109

  8. #8

    Default

    The carb may or may not be your problem, but I can add the following...

    I've tried rebuilding my Zenith and ran into problems with gaskets not fitting. Got the Chinese made Zenith carb and it did fine for awhile, then the accelerator pump stopped working. Took it apart several times but kept having the same problem. Put in the accelerator pump plunger from the original carb and it worked fine for a few months before it started binding and not squirting fuel. Took it out, sanded it smooth, had it working for a short while again.
    Finally got PO'd and bought the Weber conversion. It fit fine. Throttle linkage and original choke cable hooked right up, as did the short fat hose to the aircleaner. Had to heat and bend the pipe at the intake manifold for the brake booster vacuum supply, as it was an interference fit with the Weber. Have only driven the truck a few miles with the Weber carb but it ran very nicely.

  9. #9
    Join Date
    Nov 2021
    Location
    Niagara
    Posts
    24

    Default

    Could be a float bowl issue... overfilling.

  10. #10
    Join Date
    Apr 2021
    Location
    SF Bay Area
    Posts
    199

    Default

    Thanks folks for all the tips.

    Especially appreciate the product reviews about the carbs. I ordered a Weber, and I'm feeling good about it. We'll see how it goes.

    I'm going to keep the Zenith carb in a box, in case someone down the line wants it. I find myself feeling like this alot, lately. Hate to throw out an original Zenith, and replace it with a sketchy repro. Also kind of feel bad to deny future generations of one more original part. So. I guess I'm an old parts hoarder now. Hehe.

    Maybe I'll take the Zenith apart and post pictures. See who was right.
    ...┌───────┬──,,
    ...|______OD__|__\\_____
    ...d ..__ ......... |... | ..__....p
    └/ | \────┴──┴/ | \─┘≡
    ..../..@........................@

    1973 Series 3, 109

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