No rpm signal sometimes...... which means No Spark or Fuel

[proutyc]

Sorry for another dumb newbie post

I ran through a heap of checks getting ready to start my race car for the first time. I ran the coil and injector test and you can hear the coils clicking, the injectors click alot louder. It says its synced and not have any My problem is when I crank it over I dont appear to be getting any fuel or spark.

I'm assuming I've made a dumb newbie error somewhere just not sure where best to start.

Any guidance would be great appreciated. Hope to start then will have a 2-3 hour drive to take it to a DTA dyno operator

Thanks in advance

[stevieturbo]

Do a crank scope trace. Likely you arent getting a crank signal.

[proutyc]

Many thanks Steve.

Here's a screen shot of the scope. Sorry not huge expert on these

thanks for your help.

[stevieturbo]

It's certainly seeing the engine turn over. Can you post a full screenshot, that's very small. What sort of rpm are you seeing when cranking ? and is battery voltage good when cranking. The huge variation in the graph looks like it's struggling every time it sees compression.

[proutyc]

Yeah Battery was getting a bit down (back on charge today). Will remove all plugs but number 1 and redo tests. Is it normal that when doing this crank test (I have crank type as 0. and manually have 24-1 in the settings) I get a result unknown crank wheel?

Thanks for all the help Stevie appreciate the time educating me on where to look

[stevieturbo]

What crank/cam trigger does the engine actually have ?

[proutyc]

Just the factory Hayabusa 24-1

Just noticed thank on the crank oscillo I dont have an rpm value. On v65.01 should that show on value??

[proutyc]

OK now I really feel like I'm getting over my head.

Just checked few more bits. Pulled all plugs and all have spark on test. I turned over engine with only plug in No1. funny thing here is all of a sudden I now have an rpm and also synced cranks signal where it says it's found crank 24-1 and recommends 30 or 180 degrees. Put plugs back in and nothing else and RPM signal gone again....

Can it be current draw through the starter and causing low voltage? Made no difference with jump pack

[Rob Stevens]

I think you might have the general engine settings wrong, I can't read that small screen shot but it sounds like you need to set to 24 teeth and 1 missing tooth, I think standard busa trigger is 105 or 110 degrees.
Fkywheel mode 17 if you are using cam sensor or mode 0 if not.
I also recommend 0 tooth on start up, this can help prevent kick back and damaging starter assembly and crankcase breakages.

[proutyc]

Many thanks Rob.

Didnt get to car last night. So If I want batch on crank and then switch to seq above 1000rpm do I still put it in mode 17?

Thanks