Author Topic: testing injector firing order  (Read 8152 times)

Offline Seight-v8

  • Sr. Member
  • ****
  • Posts: 339
  • BHP: 6
    • Members Page - Scott Richmond
testing injector firing order
« on: November 08, 2009, 10:58:24 pm »
hello all,

So is it possible to test fire the injectors from either megatune or vemstune, before i offically start my engine?

Just thinking i need to make sure i've got the wires going to the right injectors, as i have eight, and would like to make sure everythings ok, before i assemble them for good.

cheers

scott
Engine:Rover V8 4600cc
Vems Firmware:V1.2.38, GPS, SDcard, LCD & Dual lambdas, Wasted spark, 36-1 trigger, Cam Sync & Bluetooth serial.

http://www.vems.hu/wiki/index.php?page=MembersPage%2FScottRichmond

Offline gunni

  • Hero Member
  • *****
  • Posts: 1492
  • BHP: 37
Re: testing injector firing order
« Reply #1 on: November 08, 2009, 11:38:08 pm »
Do you mean individually?

Or as if the engine is running

Offline Seight-v8

  • Sr. Member
  • ****
  • Posts: 339
  • BHP: 6
    • Members Page - Scott Richmond
Re: testing injector firing order
« Reply #2 on: November 09, 2009, 12:27:12 am »
yes individually.

Want to make sure i have the firing order correct.

Something about mdnxx.....but i dont know exactly how it works or how to do it.

cheers

scott
Engine:Rover V8 4600cc
Vems Firmware:V1.2.38, GPS, SDcard, LCD & Dual lambdas, Wasted spark, 36-1 trigger, Cam Sync & Bluetooth serial.

http://www.vems.hu/wiki/index.php?page=MembersPage%2FScottRichmond

Offline gunni

  • Hero Member
  • *****
  • Posts: 1492
  • BHP: 37
Re: testing injector firing order
« Reply #3 on: November 09, 2009, 12:56:34 am »
You could also just select the outputs in megatune as controls for fuel pump or similar and that way test each output on it´s own.


Offline dnb

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 837
  • BHP: 19
Re: testing injector firing order
« Reply #4 on: December 03, 2009, 01:49:10 am »
You can use a computer sound card to play a trigger pattern into the primary trigger.  This will trigger the ECU and you'll see the firing order happen.  It's best to use LEDs instead of the injectors, and make sure the fuel pump is disconnected!

Offline Tony C

  • Hero Member
  • *****
  • Posts: 650
  • BHP: 8
    • Capriracing
Re: testing injector firing order
« Reply #5 on: December 03, 2009, 01:59:06 am »
You can use a computer sound card to play a trigger pattern into the primary trigger.  This will trigger the ECU and you'll see the firing order happen.  It's best to use LEDs instead of the injectors, and make sure the fuel pump is disconnected!

just gathering the bits to make the above myself for my ecu,

Vems Ecu, Twin Plenum efi and N2o
13.314 @ 104.39 mph (10/06/07 3.9 v8)
Sponsored by: www.caprisport.com & www.interpart.biz
Web site: http://www.capriracing.co.uk

Vems Firmware: V1.1.74

Offline GintsK

  • Hero Member
  • *****
  • Posts: 1257
  • BHP: 50
Re: testing injector firing order
« Reply #6 on: December 03, 2009, 04:40:39 pm »
On the engine you can switch of coil of chosed cylinder (type unused ign output) and then injector (type 0 for this cylinder). If both matches, just exact cylinder will not work. If injector would miswired, then you will get two non working cylinders.

Gints