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royboy159

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Posts posted by royboy159

  1. Hey Eye W----Welcome a"board".

     

    30,000 is the recommended mileage for filter replacement and if it was original, it definitely needed replaced due to likely small trips.

    A failing O2 sensor can decrease gas mileage. If the O2 monitor LED is flashing fairly steadily after the engine is well warmed up and running then the sensor is functioning adequately.:cool:

    Parts stores should always get it right but just to be sure: NGK--BPR6ES-11, NIPPONDENSO--W20EPR-U11, CHAMPION--RN9YC-4.:)

  2. Hey dneu----If the coil integrity checks out O.K., i.e. primary- .84 to 1.02 ohms, secondary- 8000 to 12000 ohms, and primary to case- >10 megaohms, then I'd suspect the igniter transistor also.

     

    Interesting you mention double checking wiring. Is this necessary because it's a retrofitted engine with an earlier years ECU?

  3. its an 87 mpfi hot wire style engine (optical dizzy)

    Hey Dneu----This is useful to know.

    I would pull the battery power to trash the codes after making sure sensor terminals are all clean. After two minutes reconnect battery and then try to restart engine. Then recheck codes. Code 11 will indicate a disty problem.

  4. Here's the thing, none of the articles or threads I've read say anything about compression stroke, they just say line up the 3 marks. Soooo.... Does that mean I din't turn the crank 360? Ie; when I'm turning the crank to bring the drivers side dot DOWN, I should turn past the down position and keep turning till it's pointing down again?

     

    When the 3 timing marks come up, which cyclinder should be compressing? 2?

    Hey Singl----Looks like you did it right. Turning the crank 360 will turn the cams 180. With the driver cam notch up, #2 is at TDC on compression. With passenger cam notch up, #1 is at TDC on compression.

    Did you recheck compression with oil?

  5. I have sprayed out the dist. cap with electrical cleaner twice and left to dry, can there be moister below the the rotor and into the other parts?

    Yes. But that moisture usually allows the engine to run and misfire later.

    Also can moister effect other sencors on top of the engine (airbox control).
    Sometimes. But that moisture usually dries out quik. :-\
  6. I have a 1983 Brat with a EA81T and I was thinking of getting a Ea82T for it is it worth the work to convertit or just to rebuil the EA81T? Will I get a lot more power out of the EA82T? And how hard is it to convert it. Is the wire really hard?

     

    Thanks

    Hey kt----Are you swithching out the EA81t because the original problem it had was never cured? If so, that's a shame. We should fix it first.:)

  7. Hmmm ... I have a liquid teflon lubricant made for bicycle chains that once it's dry is not sticky at all, unlike any oil or grease -- doesn't hold onto grit. I wonder how it'd work in electrical switches.

    I'd bet teflon would stop electron flow in it's tracks.:banghead:

  8. . Injectors use relatively high currents, and these currents have to flow back to the battery through the EFI computer’s ground wire. This causes a voltage drop on that ground wire.

    It took me awhile but now I understand why changing a grounding point, such as for the injectors, could upset the sensors' voltage drops and therefore change what the ECU does.

    Also the full text article clarifies why sensor wires need protected from the induction produced from spark plug wires. Which having signal and ground wires running side by side accomplishes.

    Thanks Hank:)

  9. I've also got to mount my ham radio antenna (I'm N6VSB) -- looking into this, I've found you can have a good DC ground electrically that is still not a good RF (radio frequency) ground for ham radio operation.

    I'm learning something new every day. I was told years ago that RF "voltages" made corrosion impedence a miniscule problem. Appears not true.

    And a note on terminology -- "dielectric" is confusing, it's actually a term that needs a number with it to describe how much electric potential is needed to cross it; there are highly insulating dielectric greases sold apparently for spark plug connections to 'keep the electricity inside' -- they allow the current to go where it should but not find other paths. There are specifically conductive greases.

    I'd guess my Dow Corning dielectic is something in the middle.:banana:

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