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93 Accord sluggish carbon plug foul no power

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    #1

    93 Accord sluggish carbon plug foul no power

    All thanks for advice: car ran good, parked 2 hours, startup and seemed something quick failed, to misfires, no power, bogged out but got few miles home and over to mechanic. Mechanic put in plugs, wires, distrib, rotor. No good. I am mad, now checking it myself. Found coil out of spec, no cross terminal ohms reading. Changed. Have good spark. No good. Initial CEL was CEL ON only. Now has CEL codes 12, 15, 43. Ignition, EGR, Fuel system. Ignition does not appear it. So rich gas/air, so planning to check fuel pressure. Did manifold vacuum observation: rapid swing from 15 in to zero, maybe averages about 8 in? Did compression tests: OK. EGR can't get off valve right now (TIGHT nuts!!), but ohms checks work, applied vacuum manually, no more bogging happened, EGR control showed ZERO applied vacuum after car warmed up (seemed to be 7 inch until that triggered?). Oxygen sensor ohms check only OK, have not done hot testing. So many possibles? What to do next after fuel check? Will try torch to break loose EGR valve for look see next if fuel pressure checks OK. Help please. Anyone see CELs and symptoms like this and solved?
    Last edited by larson100; 09-07-2013, 04:39 AM.
    Tags: None
    #2
    43 is most often an oxygen sensor code, so I would change that sensor.
    A failing o2 sensor WILL cause bogging, and the resulting overfueling will often foul plugs quickly.

    Replace your o2 sensor with either a Denso or an NTK unit. Do not use Bosch. Almost every Bosch sensor I've ever seen used in these cars fails immediately, if it works at all.






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      #3
      Thanks for insight and O2 info, I will work along that line.

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        #4
        I've had a similar issue to this . When i checked around, i discovered it was a faulty injector. One of the bellows/ Diaphragms ripped causing fuel to be improperly metered. Altough repairing the injector unit was cheaper than buying a new one, i still changed it. I hope this helps.

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          #5
          A bad injector could definitely do it. Are all the plugs fouled equally, or is it just one or two? Equally, then it's likely not an injector. But if it's one or two, then injectors could certainly be a possibility. An injector that is dribbling fuel rather than spraying it properly would likely result in an incomplete burn, which would foul the plugs.

          Also, if your spark plug tube seals are bad, and you're leaking oil into the cylinders, that would cause all those problems as well.






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