WHY IS MY NUMBER 7 INJECTOR WIRE NOT PULSATING?

2000 Jeep Laredo

Tiny

beccaentler

September, 25, 2012 AT 2:39 AM

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

8 Answers

Tiny

KHLow2008

September, 25, 2012 AT 5:30 AM

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?

Tiny

beccaentler

September, 25, 2012 AT 8:18 PM

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.

Tiny

KHLow2008

September, 25, 2012 AT 8:22 PM

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?

Tiny

KHLow2008

September, 25, 2012 AT 8:22 PM

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

Tiny

beccaentler

September, 25, 2012 AT 8:41 PM

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

Tiny

KHLow2008

September, 25, 2012 AT 9:09 PM

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.

Tiny

beccaentler

September, 26, 2012 AT 12:24 AM

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

Tiny

KHLow2008

September, 26, 2012 AT 4:18 AM

You're welcome.

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