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davek

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About davek

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    Regular

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    DicksonTN

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  1. davek

    L28ET crank position sensor

    Turns out the CAS was bad however my main problem was I wired the COP's and the injectors wrong. I am embarrassed to say. MS wires are labeled A, B, C, D, E, F and screwed up and wires them to #1, 2, 3 ,4 ,5 ,6 instead of firing order. Engine runs good now.. I still have CAM Fault red light on tunerstidio. Can't find a good answer for that. I also have another wiring problem that I just found. I pulled the fuse that powers MS and the engine still fires up. I'll report back.
  2. davek

    L28ET crank position sensor

    change option setting in megalogviewer. duh
  3. davek

    L28ET crank position sensor

    I just notice in the data log my rpm's in the 80k to 100,000 range. How does MS let it idle. I've got problems.
  4. davek

    L28ET crank position sensor

    I'm back--- weather returned to normal after low teens. Pulled #4 &6 injectors and back flushed them then installed in #3&5 position. Problem did not follow the injectors. Aw crap. Rechecked in test mode injector & coils both function. Recheck cylinder compression-OK. Sill have cam fault light on TS dashboard. Composite log looks perfect. Attached latest data log. Almost like #6 & 4 timing is off. How can this be? #1 & #5 plugs look good. #6 is black #4 is not as black. When pull #6 injector connector the exhaust popping stops and A/F goes full lean. I would expect this. Pull #4 and little A/F change. Neither affects RPM. running out of things to check! Any ideas? What settings do I change to run wasted spark. I look that up & try it. Seems like I tried that this already but may not have had all setting correct. Dave 2018-01-07_18.34.01.msq 2018-01-07_16.43.32.msl
  5. davek

    L28ET crank position sensor

    latest update new CAS in the distributor. Started with my foot tweeking the throttle. After is settle down off ASE it would idle. Adjusted timing to 10 degrees--very steady timing light. Then switch over to the table. Still rough missing idle & exhaust popping. no sync error but I do have CAM Fault red lght Composite logged looked very steady. pulled #6 injector connector(straight 6 engine) and popping stopped. Reconnected injector and pulled #6 COP connecter - popping stopped. No RPM difference either way. Pulled each injector connecters one at a time. #4 makes no change to engine idle. Swapped #6 & #4 COP to other cylinders. Problem did not follow the COP. all 6 plugs are filthy black. #4 & 6 are dry as are the others I assume from trying to run the last couple weeks with no success. Changed out all plugs and ran engine for only a couple minutes. All plugs looked new. Next step is to swap the 2 injectors to other cylinders to see if symptom follows the injectors. Thought process is dirty injectors. Why a CAM fault??? From reading other posts this fault is not my idle issue. I did start it once today and had no CAM fault. Never had any RPM sync error. composite log attached all comments welcome. Dave 2017-12-26_15.45.59.csv
  6. davek

    L28ET crank position sensor

    yes I installed that resistor in MS a few years ago when I assembled MS3X. Instructions were pretty clear now that I reviewed the instructions. I had forgotten this. Does the log from previous post tell us anything? Rain the next several days. Rather not work in the rain. Will post more when I get something to share.
  7. davek

    L28ET crank position sensor

    Received the CAS unit today. Bench test green wire was about the same at 1.3v. White wire was only 0.1 at the high spots. On the engine it started better. Had to keep my foot on the throttle some to keep it running. Still has a miss but sounds more like one or 2 cylinder missing. Stinks rich. attached a composite log. What does the log tell us? I am by myself so couldn't check timing but sounds like way more than timing. It almost would run at idle. Tomorrow or sat I'll get it outside(exhaust reasons). Adjust the butterfly screw or IAC to keep it running. Determine which cylinders are not firing etc. megalogviewer says I need to register to read the full log file. $39.95 I though this license came with tunerstudio registration? 2017-12-21_17.47.47.csv
  8. davek

    L28ET crank position sensor

    SleeperZ the link is DIYAUOTUNE direction for using the trigger wheel in an L28ET distributor. It does require a pull up resistor as you stated. This is done inside megasquirt. Or can be done right at the wires are you said. MS manual says this to do this or internal to MS. I followed these direction when I assembled my MS. It worked fine. https://www.diyautotune.com/support/tech/hardware/nissan-trigger-disc/ Just ordered CAS on EBAY. Out of California via Taiwan. We see mid next week. New $49 delivered.
  9. davek

    L28ET crank position sensor

    cgsheen What you post about 5v is what I keep hearing. However my distributor is not doing that. If you look at my previous post that has my various logs there is something wierd going on. Maybe this is typical results of a CAS fault. Not defined. I will continue trying to locate an older Nissan with a VG30 engine this week.
  10. davek

    L28ET crank position sensor

    No luck at Pull A Part today. oldest maxima was 94 and it had the newer style CAS. with the connector sticking out the side instead of downward. I did bring the CAS home. It won't fit in the distributor of course. No pathfinders or frontiers old enough at Pull A Part. Villager and Quest as well. Can someone confirm ZXT CAS white wire has zero volts when powered up like sleeperZ's instruction's. Check green wire also. cheers
  11. davek

    L28ET crank position sensor

    WOW For several thousands of miles I had the black distributor wire grounded to negative battery. MS pin #1 was not used. The distributor has a heavy paper gasket at the base that would not help grounding to the engine but does directly contact the front cover enough for a ground. I will connect the ground wire to pin #1 per MS wire diagram. as I skimmed the article. I have all grounds going to my fuse panel which has direct ground to the battery terminal. Nothing grounded directly through the engine, frame etc.
  12. davek

    L28ET crank position sensor

    SleeperZ With 2.2k I get a steady 0.44v then a rise to 13.5 at that one spot on a revolution. I used the resistor on white wire and got zero to open line to 14v turning very slowly. Are we confident enough it's shot for me drop $120 on a new one? I will see if the junk yard has one tomorrow. Its been too long and I didn't take notes when I assembled MS but I'm sure I followed the direction on DIY and installed a resistor as described. so what about white wire and no voltage. Actually reads 0.035. CAS seen better days!!! I'll follow your install info chickenman. report back soon as I can get used one. thanks guys.
  13. davek

    L28ET crank position sensor

    here is latest MSQ, data log and composite log. This engine ran OK for a couple years then I rewired using DIY MS & MSX wire harness. I mixed wired the green, white & black wires in the dizzy during the process. I hope it didn't burn anything but the optical sensor. Dave CurrentTune.msq 2017-12-12_17.43.26.msl 2017-12-11_19.02.48.csv
  14. davek

    L28ET crank position sensor

    The 1.3v on the green wire is one place per evolution.
  15. davek

    L28ET crank position sensor

    Thank you for replying. FYI-I have the DIYautotune trigger wheel in the distributor. Green wire is cam signal, white is crank position per DIY. I get zero to 1.3v as I manually turn the distributor on the green wire. Zero voltage on the white wire. I'm checking these back to the black wire I have my power supply hooked to. I don't understand the resistor instruction. My ignorance. Bridge a resistor directly across the 2 connectors? What size resistor. Not much to choose from in my garage shop. 10k, 2.2k
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