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Thread: Need someone with obdii scanner/ help get her started

  1. #21
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    Default Re: Need someone with obdii scanner/ help get her started



    Jim previously posted:
    "2) Pull the #1 spark plug and index the motor (starter motor or wrench crank on the cranshaft pulley bolt) and notice compression (thumb or finger sealing spark plug hole for #1) pushing your finger out of the way - that's the compression stroke - just after that stroke would be the power stroke and your finger would be pulled towards the spark plug hole."

    That is what I would do to find the compression stroke.
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    Default Re: Need someone with obdii scanner/ help get her started





    Now correct me if I'm wrong, but my research led me to understand that when indexing the distributor, I should have the balancer at 0 and the rotor pointed to 5 o clock, this being the compression stroke. If the rotor was facing 10, then it would be on the exhaust stroke??? Unless I'm incorrectly looking at how the rotor is pointing.

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    Default Re: Need someone with obdii scanner/ help get her started



    4x4JeePmaNthINg previously posted:
    "my research led me to understand that when indexing the distributor, I should have the balancer at 0 and the rotor pointed to 5 o clock,"

    This is Mike's position - you need to ensure you're at Zero / 0 on the crankshaft pulley ON THE COMPRESSION STROKE as it can be at zero / 0 but be on the exhaust stroke. If the crankshaft is at zero - but on the exhaust stroke (the wrong zero), no matter what you do with the distributor - it'll be wrong.

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    Default Re: Need someone with obdii scanner/ help get her started



    Hypoid previously posted:
    "No mention of the compression stroke.

    The notch lines up at the end of the compression stroke and the end of the exhaust stroke. It is very easy to install 180* out."

    Agreed. I have helped more than 1 person with their distributor, which just turned out to be 180 off.

    There are several different tricks to do this, some take an assistant.

    1) pull the valve cover off. rotate the engine until you are at o degrees and both valves on #1 are closed
    2) put a wrench on the crank bolt to manually turn it. Pull #1 plug. Put your thumb over it while the engine is being turned over. You should feel the compression on your thumb since you won't be able to hold back the PSI on the compression stroke. When it is at 0 on the pulley, you are at TDC.
    3) thread in a compression tester. Similar to #2, you will see the needle move up when you are on the compression stroke. Stop at 0.

    Hope that helps!

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    Default Re: Need someone with obdii scanner/ help get her started



    Oh I remember pulling my distributer out with out marking the location. What a nightmare trying to find the right spot to drop it back in. I hope that once you get it right she fires right up.

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    Default Re: Need someone with obdii scanner/ help get her started



    I'll check as soon as I can, 12hr shifts don't make progress easy haha

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    Default Re: Need someone with obdii scanner/ help get her started



    Patrolman previously posted:
    "2) put a wrench on the crank bolt to manually turn it. Pull #1 plug. Put your thumb over it while the engine is being turned over. You should feel the compression on your thumb since you won't be able to hold back the PSI on the compression stroke. When it is at 0 on the pulley, you are at TDC."

    The only caution to this method is the exhaust valve is still closed at the start of the exhaust stroke. As the crank rotates, you will feel pressure build, until the exhaust valve opens. That is part of the reason this mistake is easy to make.
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  8. The Following Member Says Thanks to Hypoid For This Post:

    Jim (February 23rd, 2019)

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    Default Re: Need someone with obdii scanner/ help get her started



    Perhaps I'll rent a pressure gauge just to make sure I got it turned over to where I thought air was coming out a good ways after the mark on the timing cover, that's as far as I got before I had to leave for work because my spark plug fell conveniently between the alternator bracket and the block, so I went fishing.

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    Default Re: Need someone with obdii scanner/ help get her started



    What's the gallery think about this: Pull the dist and rotate it 180 degrees from where it currently sits. Any harm in trying - no issues with a backfire causing problems?

    My thought is that this change might be a quick and simple test.

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    Default Re: Need someone with obdii scanner/ help get her started



    Jim previously posted:
    "What's the gallery think about this: Pull the dist and rotate it 180 degrees from where it currently sits. Any harm in trying - no issues with a backfire causing problems?

    My thought is that this change might be a quick and simple test."

    I was thinking the same thing but something else is concerning. He tested with a light from ignition coil and is getting no spark. I would get the spark first then worry about timing. Here is a link how to test ignition coil.
    http://www.fixjeeps.com/jeep-ignition-coil.html
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    Default Re: Need someone with obdii scanner/ help get her started



    4x4JeePmaNthINg previously posted:
    "I tested for spark from the ignition coil out with a test light."

    xaza previously posted:
    "He tested with a light from ignition coil and is getting no spark."

    I went back to re-read - first time through I took this as there was coil-spark - but now, I don't see it saying either way. So, Matt, is there spark from the coil?

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    Default Re: Need someone with obdii scanner/ help get her started



    Jim previously posted:
    "What's the gallery think about this: Pull the dist and rotate it 180 degrees from where it currently sits. Any harm in trying - no issues with a backfire causing problems?

    My thought is that this change might be a quick and simple test."

    If the new one time around revolution ive done with the crank is on the correct compression stroke, then I will have to re-index the distributor, because the rotor is now pointing to 10 o clock.

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    Default Re: Need someone with obdii scanner/ help get her started



    Jim previously posted:
    "I went back to re-read - first time through I took this as there was coil-spark - but now, I don't see it saying either way. So, Matt, is there spark from the coil?"

    There is No spark from the coil from my test light. I don't know if there is any validity to this, but a work friend thought test light directly to the coil would be too much voltage to indicate spark and that I may want to try a spark tester/ screwdriver in the plug and look for spark to another piece of metal.

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    Default Re: Need someone with obdii scanner/ help get her started



    Spark from the coil:

    There is no concern for too much voltage direct to coil.

    If no spark from the coil - Cliff's on point - this is an issue that needs to be tended.

    You're doing this coil-spark test via cranking the motor with the coil and ignition system fully connected (12vDC power to the coil as well as trigger to the coil), yes?

    An option is to connect a spark plug to a plug wire. Ground the plug in a spot where you can visually see the plug's gap (see a spark jump the gap). Plug the other end of the wire into the coil. Ignition to on and try to start the engine. You might need an assistant / depending upon where you can mount & ground the plug. Do you see any spark when you try to start the motor?

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    Default Re: Need someone with obdii scanner/ help get her started



    There are several sensors that directly affect wither you get spark or not. One is located under or near the battery tray. If that is not connected or goes bad you won't have anything coming out of the coil. I don't remember what it's called Mark had a issue with that one. Crank sensor, there is a couple others. Would think if you had a running engine before the swap that they wouldn't be the source but I would pull and use a electrical cleaner and dielertric grease for the connector plugs (ie; water crossings) to insure those aren't the problem. Corrosion in any of the connector plugs might cause no spark.

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    Default Re: Need someone with obdii scanner/ help get her started



    There is a heat sensor in the battery tray, but that's the only one near it that I know.

    Anyway the to do list thus far is:

    Check distributor index and tdc with a gauge

    Check for spark from the ignition coil, or rather the wire from it

    Check for key on 12v to the coil
    Feel free to steer me in the right direction if I'm not on track, I really need to get this vehicle running.

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    Default Re: Need someone with obdii scanner/ help get her started



    She running now, however I have two codes.

    P0122 TPS circuit A low voltage
    P0171 system too lean bank 1

    Both 02 sensors are Bosch, aftermarket before the swap. So is the fuel pump. I'll rent a fuel pressure tester.

    Any thoughts on what to check?

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    Default Re: Need someone with obdii scanner/ help get her started



    ___________
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    Default Re: Need someone with obdii scanner/ help get her started



    4x4JeePmaNthINg previously posted:
    "She running now, however I have two codes.

    P0122 TPS circuit A low voltage
    P0171 system too lean bank 1

    Both 02 sensors are Bosch, aftermarket before the swap. So is the fuel pump. I'll rent a fuel pressure tester.

    Any thoughts on what to check?"

    The TPS fault can cause the O2 code. Time to troubleshoot the Throttle Position Sensor input, output, and sweep.
    ___________
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    Default Re: Need someone with obdii scanner/ help get her started



    Congrates! Some progress. Now you can get it tuned and ready to rock-n-roll.

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