Fuel injectors control

Tiny
SUBARU1
  • MEMBER
  • 2000 SUBARU OUTBACK
  • 4 CYL
  • AWD
  • MANUAL
  • 220,000 MILES
Is there anything other that the PCM that will cause the injectors not to open and close to supply gas to cylinder? I have gas to the injectors but not to cylinder. If I put gas into cylinder it will fire. Is there a check to see if PCM is the problem?
Friday, July 10th, 2009 AT 8:49 PM

5 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi subaru1,

Thank you for the donation.

The normal procedure is to confirm if the injectors are getting power supply when cranking. One of the injector wires should have voltage when cranking.

To test if the PCM is grounding the circuit, disconnect an injector wire connector and attach a noid light between the wireharness 2 pins. Crank engine and if noid light pulses, the PCM and circuit is ok.

If not, you would have to test the wire for continuity from injector to PCM.
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Saturday, July 11th, 2009 AT 11:52 AM
Tiny
SUBARU1
  • MEMBER
  • 2 POSTS
Thanks for the information on how to check the injector. My injectors were good. The problem was fuel pressure. In the fuel pump complete assembly there is a pressure chamber with a metal cap and 0-ring. One the tabs that hold the cap on was split from the manufacture and the system would not build enough pressure for the injectors.
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Monday, July 13th, 2009 AT 3:34 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Good that you have solved your problem.

When fuel pressure drops, it would still show it presence at fuel rail and is often mistaken for a no fault situation.

Thank you for using 2carpros.
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Monday, July 13th, 2009 AT 6:29 PM
Tiny
AMANDA DAWN BAUERBACH
  • MEMBER
  • 1 POST
Hello, we just replace the motor in a 2000 Subaru Outback where does the injector wires go some of them are color coded with green?
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Tuesday, September 25th, 2018 AT 10:21 AM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello, I am Danny.

You have attached a question to a years old question.You need to add your vehicles information and make a new question for you car issue. Here is the link for you to post your question:

https://www.2carpros.com/questions/new

Make sure you are logged into the site.

Hope this helps and thanks for using 2CarPros.
Danny-
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Tuesday, September 25th, 2018 AT 3:23 PM

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