s munro Posted October 18, 2015 Report Share Posted October 18, 2015 Afternoon, Just installed a 24 tooth CAS wheel for my rb25det. When i tried scoping the triggers to make sure they were there i onlyfound the 2nd trigger present. I check all the settings which im sure are correct. I unbolted cas from the engine and spun by handand found the 1st trigger will only appear if you spin it relatively fast (by hand standard). I know the engine is spinning fast enough to start.The engine will start and run with my other cas which is a standard 360 wheel. Any ideas? Quote Link to comment Share on other sites More sharing options...
Scott Posted October 18, 2015 Report Share Posted October 18, 2015 Hi,Interesting you can not see trigger 1 on the scope, this would tend to indicate a problem with supply voltage, ground, or the sensor.Normally when changing the nissan 360 trigger wheel for the 24 tooth wheel the ECU's trigger mode is also changed to 'Multi-tooth'. Quote Link to comment Share on other sites More sharing options...
s munro Posted October 23, 2015 Author Report Share Posted October 23, 2015 Thanks for the reply Scott. Found the issue. The brand new optical sensor was faulty.. But i now have a second issue. Ive put the cas back together with the 24 tooth wheel with another sensor. When you scope the trigger the Trigger one is showing, but it has an extraspike in between the normal trigger pattern. I tried another cas with a 24 tooth wheel which displayed the same scope pattern... Quote Link to comment Share on other sites More sharing options...
Dave Kriedeman Posted October 23, 2015 Report Share Posted October 23, 2015 Hi s munro,can you upload a screen shot of the trigger scope.RegardsDave. Quote Link to comment Share on other sites More sharing options...
s munro Posted October 24, 2015 Author Report Share Posted October 24, 2015 Evening Dave,i will be back at the workshop on Monday, so will get that screen shot Thanks Quote Link to comment Share on other sites More sharing options...
s munro Posted October 27, 2015 Author Report Share Posted October 27, 2015 Afternoon Dave,here is a screen shot of both triggers from the g4+I have tested this with my friends g4 in my car and the car runs fine. im started to think there is something wrong with my g4+help would be greatly appreciatedSimon M Quote Link to comment Share on other sites More sharing options...
Scott Posted October 27, 2015 Report Share Posted October 27, 2015 Hi Simon,Are you sure this is the correct 24 tooth disc for your optical sensor? There are different 24tooth discs available for different Nissan engines. We have seen this problem before when the wrong disc was fitted. The problem lied in the diameter of the disc and the width's of the gaps relative to the viewing area of the optical pickup. Quote Link to comment Share on other sites More sharing options...
sardengineering Posted October 27, 2015 Report Share Posted October 27, 2015 Scott is correct, there's a 50mm and a 54mm diameter disc. For easy reference you may measure the replacement disc against the OEM disc.Cheers! Quote Link to comment Share on other sites More sharing options...
gojira Posted February 9, 2016 Report Share Posted February 9, 2016 for the AEM disc installed in a RB CAS sensor, settings are : "multi tooth"Trigger prio ? Trigger 1 : opticalmulti tooth position : CAM ?Tooth count 24 Troigger 2 VVT : OFF ? Am i correct? Quote Link to comment Share on other sites More sharing options...
Scott Posted February 9, 2016 Report Share Posted February 9, 2016 I would expect to use the following settings:Trigger Mode: Multi-toothTrigger Priority: Trig 1RPM Filtering: 1 - DefaultTrigger 1Trigger 1 Type: Optical/HallTrigger 1 Filtering: Level 1 (Low)Trigger 1 Pullup: ONTrig 1 Edge: FallingMulti-Tooth Posn: CamTooth Count: 24Trigger 2Trigger 2 Type: Optical/HallTrigger 2 Filtering: Level 1 (Low)Trigger 2 Pullup: ONTrig 2 Edge: FallingSync Mode: Cam Pulse 1xYou will need to set the base-timing using a timing light. Quote Link to comment Share on other sites More sharing options...
gojira Posted February 9, 2016 Report Share Posted February 9, 2016 Trigger 2 only possible when ecu is connected. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.