Fuel injectors control

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?

5 Replies

KHLOW2008

MECHANIC
41,815 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

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

KHLOW2008

MECHANIC
41,815 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

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

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-