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    Random cutting out 4.3 mercruiser

    I've tried a new tks enrichment module and even tried a new 50 amp. Still acting up. I've ran all the diagnostics in manual 41 for tks. The only thing I'm not seeing is continuity at temp switch when running and disconnected at 130 degrees or so. Maybe it is the switch after all? The only...
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    Random cutting out 4.3 mercruiser

    This makes sense. I noticed the module didn't stop hissing like it should and was not warm shortly before the diode went up. I will try and confirm then order. Your help is immensely helpful dodge.
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    Random cutting out 4.3 mercruiser

    You thinking the tks module itself eh?
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    Random cutting out 4.3 mercruiser

    I wasn’t able to reproduce the issue today with meter hooker up ...and to add to the perplexity, the diode started smoking and a hole burnt through it. It was very hot. Never seen that one before. Maybe the temperature switch is revealing it’s true nature? At the time it smoked I took an ambient...
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    Random cutting out 4.3 mercruiser

    Ugh yes my bad. I'm underway. I suspected this at times. Thanks for all your help. I'll check it at port soon.
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    Random cutting out 4.3 mercruiser

    Do you mean the reset amp on front? It's a 20. This I replaced recently as well. I can check all with meter.
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    Random cutting out 4.3 mercruiser

    Sorry wouldn't let me revise. There's also a red ten amp that's not resettable. It's attached to two red with black stripe wires
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    Random cutting out 4.3 mercruiser

    It's a standard 3 fuse. It’s actually a red and purple wire separately spliced into the ignition with the red the only one going to that fuse. The purple runs up to a harness.
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    Random cutting out 4.3 mercruiser

    So is there ever a scenario where the tks enrichment or sensor would cause an issue with the ignition system? We've checked all wiring in the ignition system (except harness internals) and replaced or tried other parts within the ignition system. It still will lose voltage and turn off...
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    Random cutting out 4.3 mercruiser

    So I looked at this again with a mechanic. All the suggestions here were explored but it only died once in fifteen minutes. Same thing after cooling off an hour later: died once within warmup at idle. Might be weird but seems like after it warms up 10-15min it is less likely to occur. I drove it...
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    Random cutting out 4.3 mercruiser

    Temp at 155 on gauge, the ohms are .13 after 5 minutes. My volt meter was set at 2k
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    Random cutting out 4.3 mercruiser

    This could be coincidence but I started messing around with the harness that’s attached to the TKS module and the bundle going elsewhere. I can’t readily reproduce, but it seems like it wanted to drop more consistently after I was messing around with the wiring around that area but it wouldn’t...
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    Random cutting out 4.3 mercruiser

    Ohms read 960 at cold. Seems functional.
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    Random cutting out 4.3 mercruiser

    so this is that green wire and there’s no busbar anywhere within the range that this could connect to. It’s just at the block with the rest of the grounds. Pretty weird huh?
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    Random cutting out 4.3 mercruiser

    I can see about doing a temp or measuring resistance. Everything is grounded at block, 5 or so wires. When I replaced the negative battery cable as a test, I did see one random green 10 gauge ground wire attached to block that was not connected to anything else... which is interesting. I...
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    Random cutting out 4.3 mercruiser

    Thanks. When you say temp switch, are the meaning the plug that screws in type by the thermostat? I'm not seeing that term in my diagrams. Is the diode the red butt connector, or the connector at the end of the tks module itself?
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    Random cutting out 4.3 mercruiser

    Wiring visibly looks good at both. Voltage holds and connections are clean. I haven't tried a jumper lead yet.
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    Random cutting out 4.3 mercruiser

    Yes I have. I’ve pulled it, wiggled it while running, pulled it several times, cleaned off the prongs real good. I can’t reproduce the issue by wiggling it, and nothing looks wrong with the prongs themselves. It's a 2004, 2 bbl, TKS. Serial is 0W317634
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    Random cutting out 4.3 mercruiser

    Replaced it.
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    Random cutting out 4.3 mercruiser

    Thanks. I can go back over, I’ve cleaned the connections, pretty well along the ignition system. To the point where I would say, there’s no corrosion anywhere from the battery to the solenoid, to the starter to the alternator even slightly...but I can give it another pass over as I had only used...
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