______ 
| ___ \
| |_/ /
|    / 
| |\ \ 
\_| \_|
       
       

         
         
 ##  ##  
 ##  ##  
 ##  ##  
  #####  
    ##   
 ####    

      ## 
  #####  
 ##  ##  
 #####   
  ##     
  #####  
 ##  ##  
 #####   

 _____ 
|  __ \
| |  \/
| | __ 
| |_\ \
 \____/
       
       

 _______ 
/ ___   )
\/   )  |
    /   )
   /   / 
  /   /  
 /   (_/\
(_______/
         

IMPORTANT: enter the case-INsensitive alphabetic (no numbers) code AND WRITE SOME SHORT summary of changes (below) if you are saving changes. (not required for previewing changes). Wiki-spamming is not tolerated, will be removed, so it does NOT even show up in history. Spammers go away now.


Visit Preferences to set your user name
Summary of change:
We have a problem with a trigger system. Its on a 4 cyl H22 Honda 2.2 liter engine.Space is extremly limited.The stock crank trigger wheel (VR sensor) has 12 teeth. Camsync (VR) was extremely noise, decided not to use. We removed 1 tooth with angle grinder from the 12,90degs before cyl 1 TDC. * VR sensor measures: 2000 Ohm * 0.5V measured (with 18k internal pullup this is reasonable) Here is a oscilloscope capture.Camsynk is too noisy. However,we do not get any kind of RPM signal with VEMS,not even with Triggerlog.Wiring must be ok because the oscilloscope shows the signals. Maybe the ECU is faulty?? Please help ASAP.thanks///pnanassy http://mypic.carstyling.hu/pic/user_galeri/4670_19.jpg This trigger polarity is definitely wrong (the straight "lines" should be on negative zero-crossing). The signal was inverted since. Also, we will try "Advanced filtering", to change the default 150% threshold between 175% The 1.62 below indicates that '''Offending tooth time''' at a normal tooth is higher than 1.5 x previous time. 416 11653 2.04 MISSINGTOOTH 4 418 10645 0.91 420 14208 1.33 422 10333 0.72 424 5750 0.55 426 5378 0.93 428 6361 1.18 430 10362 '''1.62''' MISSINGTOOTH 7 432 13720 1.32 434 9512 0.69 436 5926 0.62 438 12717 2.14 MISSINGTOOTH 4 440 11060 0.86 442 14817 1.33 444 10475 0.7 446 5791 0.55 448 5448 0.94 450 6594 1.21 452 10542 '''1.59''' MISSINGTOOTH 7 454 13974 1.32 456 10397 0.74 458 5850 0.56 460 12081 2.06 MISSINGTOOTH 4 ---- Good triggerlog is like: 148 11704 2.32 MISSINGTOOTH 11 150 9035 0.77 152 10156 1.12 154 6638 0.65 156 4935 0.74 158 4980 1 160 6147 1.23 162 8921 1.45 164 9978 1.11 166 6743 0.67 168 5172 0.76 170 12574 2.43 MISSINGTOOTH 11 172 9221 0.73 174 10469 1.13 176 7007 0.66 178 5074 0.72 180 5142 1.01 182 6552 1.27 184 9097 1.38 186 10129 1.11 188 6828 0.67 190 5067 0.74 192 11890 2.34 MISSINGTOOTH 11 ---- 2009-10-21 We tried with Adv.filter 175-180 settings.Cranking is much better,RPM still drops in every 3-4secs.When RPM drops to zero engine gets massive ignition advance (or retard since its a distributer ignition system,too much retard means way to much advance on the next cyl.),which tries to kill the starter. We will try to remove another tooth to get 12 minus 2.
Optional: Add document to category:
Wiki formatting: * is Bullet list ** Bullet list subentry ... '''Bold''', ---- is horizontal ruler, <code> preformatted text... </code> See wiki editing HELP for tables and other formatting tips and tricks.