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Auto Multimeters

Discussion in ''How To' & 'Handy Hints'' started by cbus, Jan 23, 2019.

  1. cbus

    cbus Well-Known Member

    Messages:
    11,818
    Location:
    sunshine coast
    Everyone needs one of these specific units , or another brand with same features.
    https://www.jaycar.com.au/automotive-dmm-with-inductive-pickup/p/QM1444

    The price was nearly $80 a couple of years back.
    This is a great price.

    The advantage , even for the electrically and mechanically illiterate, is it has dwell as well as usual V and resistance functions.
    A bonus is thermistor
    ( temp) and RPM function s.

    If starter is slow at least you can check if the battery voltage is the issue.
    If engine won't fire but you have spark, or its firing badly at low revs, then a common issue is closed points.
    The dwell test is much easier than trying to check points gap with a feeler guage.
    Just set meter and fit 2 clips and get your reading.

    An essential diagnostic tool if you are stuck and seeking advice on the phone or forum.

    We can run thru a few basic checks that fix a lot of common faults.
    Without the info for us to diagnose you are going to be calling RACQ or similar.

    Cheers.
     
  2. Grantus

    Grantus Well-Known Member

    Messages:
    15,838
    Location:
    Southern ACT
    Followed your helpful link Col, but now says it’s discontinued, and no longer available (sold out perhaps?)......:(

    Their replacement is this one.

    https://www.jaycar.com.au/automotiv...gn=redirect&utm_source=QM1446r&utm_medium=web

    ;)
     
  3. cbus

    cbus Well-Known Member

    Messages:
    11,818
    Location:
    sunshine coast
    Slight Chance some shops may have one.
    Give local shops a call.
    Same thing happened when I bought my 1444.
    Being franchises some may have stock but not on sale.
    Bit of a dodgy system but not all have sale items.
     
  4. Barry

    Barry Well-Known Member

    Messages:
    3,718
    Location:
    Abbotsford NSW
    Am I right in that the new QM1446 HAS dwell and tacho capabilities where as the QM1444 only has capabilities?
     
  5. Mordred

    Mordred Super Moderator Staff Member

    Messages:
    2,828
    Location:
    Penna, Hobart
    I have one similar and but when I use it for tacho measurements I need to have a 470K ohm or 1M ohm resistor in the line from the coil to get a stable reading. Not sure if either of these need the same thing, but it may be helpful if you come across this problem. It just limits the noise coming from the coil.

    Adrian
     
    cbus likes this.
  6. Tangles

    Tangles Well-Known Member

    Messages:
    682
    Location:
    On the road somewhere
    according to the manual that you can download off the jaycar site, the 1444 does have both dwell and tacho.
     
    Last edited: Jan 24, 2019
  7. Tangles

    Tangles Well-Known Member

    Messages:
    682
    Location:
    On the road somewhere
    A good option is to click on the check store stock and it will tell you whether your local store has any. When you visit said local store, it will be on the shelf with a price tag of $59.95. Do not question this. Just get the helpful in-store nerd to scan it at the register and he will say "That will be $19.97. Can I help you with anything else?"
    Then you can go home having won the shopping. :p
     
    drivesafe, cbus and Grantus like this.
  8. cbus

    cbus Well-Known Member

    Messages:
    11,818
    Location:
    sunshine coast
    Yep. My 1444 has dwell , tacho, temp, plus the usual and some others.
    Trying tacho for first time today so thanks for the heads up Adrian :cool:
    Manual does say that " noise' can be an issue and to be close to spark plug end away from coil and exhaust If one lead a prob , try another.

    No mention of a fix if that doesn't work tho:rolleyes:
     
  9. cbus

    cbus Well-Known Member

    Messages:
    11,818
    Location:
    sunshine coast
    Just did a rough check of my advance curve using the QM1444 multimeter.
    Worked fine with the supplied induction pickup lead
    Bit off on number 1 lead so tried no.2 HT lead about 6" from spark plug.
    Numbers displayed seemed kosher and steady (as steady as can be expected holding throttle body by hand)
     
    Last edited: Jan 24, 2019

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