how do I check injector duty cycle with a multimeter? - AudiForums.com
AudiForums.com

Go Back   AudiForums.com > Audi Models > Audi A4 > B5 Models
Search

B5 Models Please discuss all 1996 - 2001 B5 A4 topics here...

Reply
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 04-22-2011, 06:38 PM
1st Gear
 
Join Date: May 2004
Posts: 236
Default how do I check injector duty cycle with a multimeter?

I want to measure the injector duty cycle using a multimeter. There are two wires into the injector. I would think that I should ground one wire of the multimeter and tap into one of the injector wires. But which wire do I tap into? Or, do I not ground the multimeter wire and tap into both injector wires? I don't have a VAG-COM

1997 2.8.
Reply With Quote
  #2  
Old 04-22-2011, 07:28 PM
Moderator

 
Join Date: Jan 2010
Location: Costa Mesa, SoCal
Posts: 1,958
Default

To check duty cycle, you need something that can measure time; a multimeter generally cannot do this. If you have an oscilloscope you can find out the duty cycle by measuring the time between open/closed. Best way is VAG-COM since you can get readings direct from the ECU, but maybe somebody can chime in with another alternative (I can't think of any).
__________________
2001.5 A4 1.8TQM: FrankenTurbo, Motoza E85/91, EV14 750cc, 3" MAF, 3bar MAP, 034 HFC, custom 2.5" exhaust, TR18T FMIC, DW200 pump, I.E. con rods, Eibach Pro-Street coilovers, 034 RSB, A8/TT front & S4 rear brakes, SS brake lines, JHM SS/linkage, ECS RA4 + B7 RS4 clutch, 4:1 center diff, 034 street mounts, E-fan, catch can, Apikol diff mount & Stern diff bushings, Nexus 7 HU, custom sound system, bixenon, sport cloths.

2004 A4 1.8TQM USP: APR Stage 3+, S4 mirrors, RNSE

Past: 1998.5 A4 1.8TM
Reply With Quote
  #3  
Old 04-22-2011, 07:37 PM
ImTheDevil's Avatar
Administrator

 
Join Date: Jul 2006
Location: Binghamton, NY
Posts: 11,670
Send a message via Yahoo to ImTheDevil
Default

Vagcom or a scope. A meter won't react quickly enough (you're talking milliseconds) to show you anything.
Reply With Quote
  #4  
Old 04-22-2011, 07:54 PM
1st Gear
 
Join Date: May 2004
Posts: 236
Default

My multimeter has a duty cycle setting. I just need to know what wires to probe. There are two on the injectors.
Reply With Quote
  #5  
Old 02-29-2016, 08:02 PM
1st Gear
 
Join Date: Feb 2016
Posts: 1
Default

Quote:
Originally Posted by gregp1962 View Post
My multimeter has a duty cycle setting. I just need to know what wires to probe. There are two on the injectors.
Read this. Very helpful.


http://en-us.fluke.com/training/training-library/test-tools/digital-multimeters/how-to-measure-duty-cycle-with-a-digital-multimeter.html
Reply With Quote
 
 
Reply


Similar Threads
Thread Thread Starter Forum Replies Last Post
Check Engine Rediness Cycle for Pre Cat and Cat Codes Jayr1000 Audi A6 3 02-19-2011 01:14 PM
CEL cycle time? a4sport Audi A4 1 09-25-2006 05:08 AM
OBDII Drive Cycle OysterBay New Member Welcome Area 3 11-06-2005 07:50 PM
Check engine light from Fuel Injector fluid? mig Audi A6 2 09-26-2005 12:35 AM
finally found the cycle i want! SamJamaica Off Topic 14 04-27-2005 03:56 AM


Tags
audi, check, checking, cycle, duty, injection, injector, injectors, measuring, multimeter, read, tap, test, voltmeter, wire

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


 

All times are GMT -4. The time now is 10:29 AM.