How to test injectors?
Thread Starter
Melting Slicks
Joined: Jan 2002
Posts: 2,238
Likes: 4
From: Milan
How to test injectors?
I have to measure resistance but I really don't know how..
Think to explain it to a child (i have 0 knoledge on electronics things...)
Yes I have a voltmeter (the thing with attached two wires and a big selector on the middle)
I think I have to use the selection on the ohom side (resistance = ohoms right?)
Where I have to put the two stings? The car should be with the ignition ON? the engine started?
My car is a 90 with stock 22lb/h injectors
Thanks
-Beppe-
Think to explain it to a child (i have 0 knoledge on electronics things...)
Yes I have a voltmeter (the thing with attached two wires and a big selector on the middle)
I think I have to use the selection on the ohom side (resistance = ohoms right?)
Where I have to put the two stings? The car should be with the ignition ON? the engine started?
My car is a 90 with stock 22lb/h injectors
Thanks
-Beppe-
Drifting
Joined: Apr 2003
Posts: 1,379
Likes: 4
From: rome ny
your ohlm readings should be 14-16. you do not need the car runnng or ignition on but the injectors test better when warm. set your voltmeter to 200 ohlms. take the injector harness off the injector and it doesnt matter what end of the voltmeter you put where. if any injector is out of range change them all. this test will only check the mechanical part of the injector, they can all test good and you could still have a bad spray pattern. if they test good i would still send them out to be cleaned and blueprinted. tpis does this for about $8 per injector. 
Thread Starter
Melting Slicks
Joined: Jan 2002
Posts: 2,238
Likes: 4
From: Milan
Originally Posted by mos90
your ohlm readings should be 14-16. you do not need the car runnng or ignition on but the injectors test better when warm. set your voltmeter to 200 ohlms. take the injector harness off the injector and it doesnt matter what end of the voltmeter you put where. if any injector is out of range change them all. this test will only check the mechanical part of the injector, they can all test good and you could still have a bad spray pattern. if they test good i would still send them out to be cleaned and blueprinted. tpis does this for about $8 per injector.
Let me know if I understand:
I take one of the 2 ends of the voltmeter (no matter wich one, the red or the black on the voltmeter are the same..)
Where I have to put this end? on the body of the injector?
on the harness? Which harness'? there are 2 wires comes from the top of the injector..
Sorry Im so stupid on this..
-Beppe-
Drifting
Joined: Apr 2003
Posts: 1,379
Likes: 4
From: rome ny
on the top of the injector there will be 2 pins, put the black on 1 end and the red on the other. you will need to take the injector harness off the top of the injector then you will see the the 2 pins.
