Trigger related page for MembersPage/EricN
Started over with input trigger ideas. Took a VR sensor and 24 tooth trigger wheel out of a Honda Civic distributer. Ground off 1 tooth, pressed it on to a gutted Unimog distributer (took the whole advance mechanism out). Welded a plate inside, mounted the VR sensor on the plate. Now I have a 24-1 trigger wheel driven by the cam.
My plan is to run as a 12 cyl (engine is a 6) pretending to fire wasted spark so I can use the COP coils. I thought I read somewhere about setting the number of cycles that will trigger a reset (not sure if I worded it right but meant that engine sees the missing tooth 2 times then it starts over) Not too sure if setting that to 1 cycle would work somehow, need to try and find it again.
- tooth_wheel=17 # (decimal 23 for 24-1 tooth wheel)
- trigger_tooth=00 # (or 01, 03 or 03)
- another_trigger_tooth=04 # (to fire 6 times every crankrot)
- divider=01
- alternate=15 # 6 injector banks; fire all banks at cranking
- ignchmax=05
QUESTION 1
After a major ordeal with some dead spark plugs and bad grounds, I got the truck running enough. Only problem is every now and then I get a completely dead half second and then it comes back to life. When cranking, I notice that every now and then the rpm dies off to zero for the same half second then comes back. Other than that, the rpm stays pretty constant other than the 3000rpm blip when I hit the start button. If I touch the body of the distributer with a wrench (vr sensor in distributer is my primary input trigger) while the key is on but car is not running, it triggers the ecu and injectors and coils fire a quick shot, enough for big flames out the throttle body.
I remember reading somewhere about installing a capaciter or some noise filter of some sort, could that be what I need, and where did I see that?? My scope is at work so I couldn't check with that to confirm but it sure "feels" like that is the problem.
QUESTION 2
I thought I had the input trigger lined up but I had to move the distributer to get everything to fire properly. Just to confirm, this is what I did.
The truck is a 6 cyl. I am firing cop coils and using a distributer mounted 24-1 trigger wheel. I have a trigger event every 60 degrees. If I understand right, with #1 cyl at tdc, my vr sensor needs to be placed less than 60 degrees away from my TRIGGER tooth (I used first tooth after missing). Is this correct?
I tried to use 53 degrees and put the trigger area in between 2 teeth but it needed to be played with to start the truck, altough that may be related to question #1 with the trigger dropping out.