WHY IS MY NUMBER 7 INJECTOR WIRE NOT PULSATING?

  • Tiny
  • beccaentler
  • 2000 Jeep Laredo
  • 180 miles

Have changed injectors plugs and coils it is missin really bad and the gas millage is awful

Tuesday, September 25th, 2012 AT 2:39 AM

8 Answers

  • Tiny
  • KHLow2008
  • Expert
  • 41,976 posts

If you have tested and confirmed the injector is not pulsing, you either have a break in the wiring corcuit ot a faulty PCM.

What trouble codes are you getting?

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Tuesday, September 25th, 2012 AT 5:30 AM
  • Tiny
  • beccaentler
  • Member

I had someone to put the injector test light on it all cylinders pulsated but number 7. When tested number seven light just stayed on didn't pulsate.

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Tuesday, September 25th, 2012 AT 8:18 PM
  • Tiny
  • KHLow2008
  • Expert
  • 41,976 posts

If the light stays on, it means the PCM is bad and keeping the circuit grounded. This should trigger trouble codes. Do you have any trouble codes?

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Tuesday, September 25th, 2012 AT 8:22 PM
  • Tiny
  • KHLow2008
  • Expert
  • 41,976 posts

It could also mean the wire from injector to PCM is shorted to ground.

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Tuesday, September 25th, 2012 AT 8:22 PM
  • Tiny
  • beccaentler
  • Member

What is PCM and what can I do about this problem hopefully an easy fix

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Tuesday, September 25th, 2012 AT 8:41 PM
  • Tiny
  • KHLow2008
  • Expert
  • 41,976 posts

Power Control Module, meaing the engine computer. If it is a shorted wire or PCM, it would be an easy fix but the cost between the 2 would be vastly different. You need to check/test the wire for shorting.

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Tuesday, September 25th, 2012 AT 9:09 PM
  • Tiny
  • beccaentler
  • Member

Ok I will do that Thank You so much for your help

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Wednesday, September 26th, 2012 AT 12:24 AM
  • Tiny
  • KHLow2008
  • Expert
  • 41,976 posts

You're welcome.

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Wednesday, September 26th, 2012 AT 4:18 AM

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