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Type: Posts; User: vilefly

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    Looks like 2-cycle-john is out of a job. Failed...

    Looks like 2-cycle-john is out of a job. Failed miserably in his work. Didn't even find a single vacuum leak, and you guys found them all. He is so fired. No worthy of his own scan tool which...
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    Ignition modules either have the 5v square wave...

    Ignition modules either have the 5v square wave HEI reference signal fail, or Fail to fire the coil while still output an HEI ref signal. 1% will have the Bypass circuit mess up and set a code for...
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    Sounds like the other guy.....let's just call him...

    Sounds like the other guy.....let's just call him 2-cycle-john.....was in over his head. I wonder if carburetors frighten him. I just hope the vacuum and vent hoses to the distributor are still in...
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    There are other problems it finds, and will...

    There are other problems it finds, and will confirm a cylinder leakage test. My tool bill is unrealistic, though. Tons of one-time wonders at my disposal, but it gets me there. If it were a trans...
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    I forgot one more test: the RUNNING compression...

    I forgot one more test: the RUNNING compression test. It is a bit of a pain to run (hot engine), but can reveal some things that can be missed on a cylinder leakage test. Lifters that are pumping...
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    The o2 sensor threads are 18mm x 1.50mm pitch. ...

    The o2 sensor threads are 18mm x 1.50mm pitch. Find a bolt, drill a hole in it, npt tap, install brass nipple....done. Tool for life.
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    Measurements to take: 1) cylinder leakage test...

    Measurements to take:
    1) cylinder leakage test (not a compression test)
    2) vacuum reading at idle (does it fluctuate too?)
    3)...
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    I think they are doing the old fashioned "read...

    I think they are doing the old fashioned "read the spark plugs" method. This is my guess. Whomsoever wields the answer, wields the power of one can of pop.
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    When the catalysts were replaced, was either one...

    When the catalysts were replaced, was either one broken up or missing a honeycomb element? If so, a piece might be left inside the muffler to clog up one side, and lower engine vacuum. Cut off the...
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    Ahhhh, memory flashback. I still have mine,...

    Ahhhh, memory flashback. I still have mine, also. These were pretty reliable devices, despite being slightly obscure.
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    There was a tool invented for the automotive...

    There was a tool invented for the automotive oscilloscope that was basically an optical mouse encoder wheel attached to the end of a probe. The probe wheel was pressed against the belt to spin it. ...
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    Hmmm. "Pops in the convertor". Sounds like he...

    Hmmm. "Pops in the convertor". Sounds like he thinks there is a misfire on that side. Only a gulp of air can make it pop like that, either from a misfire or an exhaust leak. I wonder if he...
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    The O2 sensor wires (harness side) both should...

    The O2 sensor wires (harness side) both should present .45V on them when unplugged. Left/driver's side = Purple/White, Right/passenger side = Purple. Make sure measured readings match scan...
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    I was only questioning whether or not an external...

    I was only questioning whether or not an external vacuum gauge agreed with the MAP sensor readings or not. The formula (MAP reading + Vacuum reading = Barometric pressure) should prove there were no...
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    What I had done is allow windows to associate log...

    What I had done is allow windows to associate log files with EEhack. Then, I double clicked on a log file, and EEhack does this.
    14766
    then this.
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    Perhaps I should post this in a matching...
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    :popcorn: Always wanted to know the strategy...

    :popcorn:
    Always wanted to know the strategy behind the optispark......this is facinating stuff.
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    heh. I'll just have to call off christmas.

    heh. I'll just have to call off christmas.
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    Hmmm. same thing happened to me months ago. I...

    Hmmm. same thing happened to me months ago. I will have to try that. I had switched computers earlier.
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    Passive filtering. I suspect this would be how...

    Passive filtering. I suspect this would be how to wire it up.

    14763
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    Has anyone checked if the IAC valve is even...

    Has anyone checked if the IAC valve is even moving in the real world? It should seat itself and open back up once upon KOEO conditions. Another problem is mismatched pintle styles that do not seal...
  21. The missing tooth will cause a misfire problem...

    The missing tooth will cause a misfire problem with a non-sequential injection computer, and this setup can only be used by the matching ecm for it......unless you are up for a little...
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    Well, I am not sure will work, but I know what...

    Well, I am not sure will work, but I know what won't work. An inline resistor to the knock sensor won't work. There is a 5v reference voltage sent to the 4K impedence of the sensor. The ecm...
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    Reviewing post #12......."There is low manifold...

    Reviewing post #12......."There is low manifold vacuum. It measures in metric by the scanner and I recall about 10-11 inches by conversion. Also vacuum gage."

    I am wondering if this was a MAP...
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    Hook up a vacuum gauge when you are done to see...

    Hook up a vacuum gauge when you are done to see if it returned to normal (18-20" of Hg).

    Had a 94 firebird come in with the opposite symptom yours had. It kept adjusting lean in closed loop on...
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    For now, it's just me and one other guy at the...

    For now, it's just me and one other guy at the shop, and we are trying to keep up with demand. Basically, it's full-on resurrection season in the fall season, and ......it's fall. My boss is the...
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