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Aug 9, 2016 | 05:19 PM

#46

m50

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Joined: Nov 2010

Posts: 89

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From: South Illinois

Quote:

Originally Posted by m50

Ok still trying to figure this out.
How would I go about measuring the source voltage to the injectors?
Thanks RB

I just checked this and my meter shows around 4.3 to 4.5 volts.
I have the meter set on the 200 volts dc setting.

Should there be dc voltage on the 2 pins next to the center common, they actually hook to the injectors don't they?

Thanks RB

Aug 9, 2016 | 05:27 PM

#47

knottyrope

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Joined: Apr 2016

Posts: 7,210

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From: Bahstun

Quote:

Originally Posted by m50

Center pin to ground. The meter can't see the rapid firing of 110 v.

I'm going to try this on mine in a few minutes.

Aug 9, 2016 | 09:00 PM

#48

m50

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Joined: Nov 2010

Posts: 89

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From: South Illinois

Quote:

Originally Posted by knottyrope

Center pin to ground. The meter can't see the rapid firing of 110 v.

I'm going to try this on mine in a few minutes.

Let me know what you find out please.

the readings I put in the post was the center (female) on the plug where it plugs into the VCG to ground.
Thanks RB

Aug 9, 2016 | 09:37 PM

#49

knottyrope

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Joined: Apr 2016

Posts: 7,210

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From: Bahstun

Quote:

Originally Posted by m50

Let me know what you find out please.

the readings I put in the post was the center (female) on the plug where it plugs into the VCG to ground.
Thanks RB

I was about to then pool filter was clogged. Too me a while to clean the tubes and reseal. Tomorrow is another day.

Aug 13, 2016 | 11:28 AM

#50

m50

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Joined: Nov 2010

Posts: 89

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From: South Illinois

Well I have ohmed out the L&R bank power feed to all the injectors, they were 3.2 or 3.3 ohms. The range is 2.8 to 3.6 ohms
L&R bank power feed to IDM ground circuit it was open.
L&R bank power feed to injector ground shield it was open.

So at this point I would think it is the IDM?
Thanks RB

Aug 15, 2016 | 09:06 AM

#51

cowmilker08

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Joined: Oct 2008

Posts: 4,818

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From: Avilla, IN

Shouldn't you be checking voltages, not ohms on power to ground measurements?

Aug 18, 2016 | 06:31 AM

#52

m50

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Junior User

Joined: Nov 2010

Posts: 89

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From: South Illinois

Well I finally bought a new IDM and installed it the other nite. Started the truck and it runs good again.
Thanks to all that helped me with problem I certainly could not have done this fix without your help.
Thanks RB

Aug 18, 2016 | 10:46 AM

#53

knottyrope

Lead Driver

Joined: Apr 2016

Posts: 7,210

Likes: 1,341

From: Bahstun

glad you are up and running again

I used a meter on my UVCH while truck was running and cant see the 110v as it is isolated to ground but when using meter across the coil output I could only see the pulses but not measure it. an oscilloscope could be used but not many have one of those. I might go dig mine out just for fun some night