vacuum leak

  1. A

    testing for vacuum leak

    Am trying to track down the source of a vacuum leak in my 60, still has all the smog equipment that I replaced with silicone hose about 5 years ago. The truck was running fine until last spring, 2023 when it went under a car cover and was left over the Texas summer (No AC). a month or so ago...
  2. HiFiGuy

    LC200 - OBD scanner code comes back with "small vacuum leak"

    Once every week or so, I get a few lights on the dash. I plug in my scanner, and it says I have a vacuum leak. "Small", or maybe it says "minor", but either way, I'm curious if this is a known issue, and if there is a kit or something that I can purchase to address it. She runs "fine", but if...
  3. tbone40

    '70 FJ40 overheating and no brake boost... booster vacuum leak?

    I have a 1970 FJ40, original F engine, most everything is original as far as I know. Aftermarket temperature gauge, normally operates around 180-200 deg F. Once it gets above 200, you can tell the thermostat opens and brings the temp back down. Have had it this way for over 10 years without...
  4. Beehanger

    Vacuum Leak? Vacuum gauge showing 12 mercury from intake.

    Hi all, Trying to tune the 60 but its proving difficult doing the lean drop with this aftermarket chinese carb I'm running with. Using a line from the intake I get 12 mercury, but i know the ideal range is 15-20. will this increase as I get closer in tuning this, or do I have vacuum leak? Im...
  5. salvage60

    stuck EGR valve / low vacuum

    I have had my 85 FJ60 for 24 years and have gone through just about everything in that time, suspension, engine rebuild, 5 speed, body work... It was time for California smog again and for the last few years the truck has not gotten a lot of use so I went through the usual checklist of timing...
  6. Brayden3223

    No brakes when engines cold!!!

    When my engine is cold I have no brakes assist, it’s bloody scary. Feels like it’s almost impossible to get the car to pull up but I don’t believe it’s anything to do with the brake booster, I have a FZJ80 Aussie spec and the same day the brakes stopped working properly the engine also started...
  7. P

    3FE rough idle

    1991 FJ80 with 245,000mi. My issue was present before and after I recently did my injectors. When idling for a minute or 2 the engine starts to misfire, lope, and generally "run rough". A quick press on the go pedal will make the engine run correct for about 5 seconds then run poorly again after...
  8. RustbucketBick

    Untunable High Idle

    Before i begin, allow me to preface this by saying that i’m new to the forums and this is my first post, so please be patient if this is in the wrong place. First cruiser, just trying to be part of this awesome community. Thank you :) But i digress. A handful of months ago, I bought an 87 fj60...
  9. F

    Vacuum leak solved

    Earlier this year I acquired (paid too much for) a 78 Fj40 and began a DIY restoration. I was fortunate to have found a truck that was 100% original and have enjoyed resurrecting my 1970's mechanical intuitions. The main difference between 1970 and now is that its much more difficult to slide...
  10. NeverGiveUpYota

    Vacuum Leak, Manifold footprint on graphite gasket

    Just layer the whole port holes w/ copper before mating the double gaskets? I pulled everything again today and what I see is a clear impression on the remflex but the corners opppsite the bolt flanges on both outer intake ports are very smooth. At the bolt flanges the material pealed off when...
  11. elliott10

    The unfindable vacuum leak

    Well ive read every thing i can find about the common vacuum leaks and I'm still having trouble. I recently installed a trollhole card and dui ignition just because i wanted to update that stuff. And the truck ran as bad or worse than with the stock setup. I finally started finding small vac...
  12. Output Shaft

    EGR Cooler Blowing Chunks

    and not just chunks, but small stones: Hard, abrasive, iron oxide rocks. I thought I'd share something new I just learned about the lowly EGR cooler. The cast iron EGR coolers can internally rust to the point that they'll eventually cough out disturbingly sized chunks of rust "stones" that...
  13. T

    Careless Desmog

    Ok, well I'm not sure if it was an effect of replacing my smog pump with a pulley but my 86' is not running so hot or more specific the idle is to low-stalls out, and it diesels, well it always dieseled but I'm curious if there are things one should be aware of before you pull a smog pump. Note...
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