1989 Chevy Cavalier 1989 Cavalier fuel injectors

Tiny
RMOREY
  • MEMBER
  • 1989 CHEVROLET CAVALIER
Engine Performance problem
1989 Chevy Cavalier 6 cyl Automatic

Looking for correct ohm reading for my fuel injectors. I had tested them with an ohm meter. Haynes book gives range of 11.8 - 12.6. I have 1 injector that reads 11.8; 2 that read 11.9; 2 that read 11.6; and 1 that reads 11.1. Are the 11.6 and 11.1 readings low enough to warrant having them replaced?
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Tuesday, May 20th, 2008 AT 6:49 PM

3 Replies

Tiny
MMPRINCE4000
  • EXPERT
Are you having a secific problem?

The lower the resistance the more amps it will take to fire the injector (ohm's law).

It sounds like the injector is towards the end of its life. If resistance gets too low and amps exceed the fuse capacity, it will blow the fuse.

The readings you gave just indicate the injectors are wearing out, and will need to be replaced at some point.
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Thursday, May 22nd, 2008 AT 5:33 AM
Tiny
RMOREY
  • MEMBER
I have spark and correct fuel pressure. Car will turn over but not start. I replaced 1 injector about 6 months ago. Car has same symptoms, no codes.
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Thursday, May 22nd, 2008 AT 6:18 PM
Tiny
MMPRINCE4000
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If you have spark and fuel pressure is good, then I would get a noid light and see if the injectors are getting the signal to fire. If not, then the fuse is out or the injector driver in the ECM.

If this is a multi-port 2.8-3.1 the injectors fire in batch sequence i.E. 1-3-5/2-4-6. So there should be two fuses for the injectors.
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Friday, May 23rd, 2008 AT 5:28 AM

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