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  1. J

    Proper Method for Setting TDC on 98 EX

    Update - Just wanted to let everyone know what I finally found and fixed. I found an intermittent spark plug wire, that was causing all of my rough idle issues. Even though I ohmed out each wire, and they were will within the tolerance described in my service manual, at least one was defective...


  2. J

    1998 Ex 2dr Rough Idle at Low RPMs

    Update - Just wanted to let everyone know what I finally found and fixed. I found an intermittent spark plug wire, that was causing all of my rough idle issues. Even though I ohmed out each wire, and they were will within the tolerance described in my service manual, at least one was defective...
  3. J

    Proper Method for Setting TDC on 98 EX

    Trying to get cam shaft pulley marks line up with head and have crank shaft pulley at TDC (white mark lined up with pointer). I rotated the cam shaft pulley too far when trying to get the marks lined up with the head (timing belt disconnected from crank shaft pulley) Now the crank shaft...
  4. J

    Proper Method for Setting TDC on 98 EX

    Yes it is a stock DY618 engine. How do I rotate the cam pulley without loosening the cam bolt that holds it onto the keyed shaft? Looks like I went to far when I was rotating it (with timing belt off), tried to continue moving the cam pulley 360 degrees and leave at TDC but the bolt...
  5. J

    Proper Method for Setting TDC on 98 EX

    Ron, I pulled the upper timing belt cover and discovered the arrows on the upper portion of the lower timing belt cover. I have replaced all of these components: distributor, plugs, 02 sensor, and ohmed the wires. With the crankshaft at TDC, the camshaft pulley marks line up with the face...
  6. J

    Proper Method for Setting TDC on 98 EX

    Issues with 1998 Honda Civic EX DY6Y8 idling rough or not wanting to run at all. See this thread for the the things I've done in my troubleshooting efforts. Only progress I've made is by removing distributor housing bolts, advancing timing outside of the range of the housing slots. If I hold the...
  7. J

    1998 Ex 2dr Rough Idle at Low RPMs

    Update Brought a buddy over and rechecked everything I've touched. Everything appeared to be right. New observations: 1) Inspected knock sensor. It appeared to be plugged in before I lightly pulled on the clip. Sensor came out. Tried running without knock sensor, car responded same. Tried...
  8. J

    1998 Ex 2dr Rough Idle at Low RPMs

    RonJ, I unplugged the OEM primary 02 sensor and cranked it. It sounded no different. Seems as though it is running worse and worse. It will hard crank at all now. When it does, feels like it is running on one cylinder, very rough. Basically just sputters very very slowly. I went ahead and...
  9. J

    1998 Ex 2dr Rough Idle at Low RPMs

    No, would get 0.6 about half the time, then it would drift to a 0.5 and back again. Mine doesnt appear to measure in the hundredths. Thanks for the advice.
  10. J

    1998 Ex 2dr Rough Idle at Low RPMs

    Aftermarket distributor. Couldn't locate an OEM quickly enough. Original was TEC...coil resistance was low on it and ICM failed test. How do I determine the internal resistance of my multimeter? What is the coil resistance supposed to be for an aftermarket distributor? I will go ahead and...


  11. J

    1998 Ex 2dr Rough Idle at Low RPMs

    Here are the results: 1) It was code 23 - knock sensor. I reset and continued to get 23, until the last check when it disappeared. 2) Pulled the coil and ICM from the brand new distributor I put in last week. The coil resistances were from A to B = 0.5-0.6 ohms, from A to Secondary = 15.8 kilo...
  12. J

    1998 Ex 2dr Rough Idle at Low RPMs

    Update Chased the spark plug threads and replaced the fouled plug. Adjusted timing (it was off quite a bit). Pulled fuse to reset CEL, warmed car up, and got new CEL codes. Here is what I got: Code 71 Random misfire cylinder 1 Code 72 Random misfire cylinder 2 Code 73 Random misfire cylinder 3...
  13. J

    1998 Ex 2dr Rough Idle at Low RPMs

    EK Rider, do you mean I should physically check TDC or just ensure timing is set to TDC via light? Forgive me if I don't make any sense. Much of this is very new to me.
  14. J

    1998 Ex 2dr Rough Idle at Low RPMs

    Ron, thanks for the additional checks. Plugs and wires replaced probably 4 years ago. Replaced fuel filter probably 6 years ago. Is the 02 sensor heater element the same as the 02 sensor sticking out of the exhaust manifold? What is the easiest way to check it if so? I think there are 3...
  15. J

    1998 Ex 2dr Rough Idle at Low RPMs

    Bump. Anybody have any advice for my situation? Here is my current plan of attack and reasoning: 1. Since I wasn't getting any random misfire or knock sensor CEL codes before the distributor swap, I'm going to check timing to ensure timing is right. I read in my Haynes manual that the...
  16. J

    1998 Ex 2dr Rough Idle at Low RPMs

    1998 Honda Civic Ex two door. Car has 185,000 miles, has been very reliable car. Have done basic maintenance over the years. CEL has been on for last few years but hasn't seemed too impact function. Yesterday, car began to idle very rough. At higher speeds was hard to notice but didn't seem to...
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