How to test if an injector is good?

Andrew7dg · 08-12-2009

I don't know if I am having injector problems or if it is something else. Is there a way to test if an injector is still good?

Is there a place to have them tested?

Is there a way for me to test if they are still good?

I may have done something that made them ground out for a period of time and wondered if it wrecked them...

deadeye · 08-12-2009

Idk what it would be for performance injectors but there is a spec in the shop manual for ohm resistance across the terminals. Im sure FIC or whoever has that spec if your running performance injectors and would be willing to share it with you.

**Shane@DBPerformance** · 08-12-2009

Put 12v to one side of the injector then ground, unground, ground, unground, etc the other side and listen/feel for it clicking.

Matt D. · 08-12-2009

I do know that both of these places clean injectors. RavenWorks is a sponsor on MNSC and has treated everyone well who has went there. TPIS is big into V8s, not sure how they'd handle someone with an import.

RavenWorks LLC
10900 89th Avenue North
Maple Grove, MN 55369
763-463-3452
www.ravenworksllc.com

TPI Specialties, Inc.
4255 Creek Road
Chaska, MN 55318
www.tpis.com

Andrew7dg · 08-13-2009

I was way too quick to write this I guess. I found the problem. When I built my wiring harness for my car for my standalone, I built in a fuse. I never checked it when I was trying to figure out what was wrong. When it grounded I guess it blew the fuse out. WHICH is much better then frying out my injectors!

Project2G · 08-31-2009

To test the injectors you need a fuel pressure gauge and injector tester which will pulse the injector at pre-determined pulse width. You turn the key on until you reach max regulated pressure(making sure your pressure is the same on all cylinder when testing)
The injector tester connects to the battery and plugs directly onto the injector and you push the button and it will pulse the injector at a pre-determined pulse width for a programmed amount of time and then you compare the readings from cylinder to cylinder.
My tester is an OTC #3398 and has 3 pulse settings.
1 pulse of 500 ms, 50 pulses of 10 ms and 100 pulses of 5 ms
The tester sells for around $100.00.I have had mine for 5 years and my brother who works at a dealership uses the same one so I feel it is reliable.
The only way to truely clean injectors is to use a setup that connects directly to the fuel rail and the cleaner runs directly thru the injectors.The fuel system on the vehicle is disabled during the cleaning procedure.

bertrenolds5 · 09-01-2009

Can't tunerstein test your injectors? Eventough you solved the problem