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post #1 of 13 (permalink) Old 10-08-2012, 04:32 AM Thread Starter
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injector solenoid ?

ok so on a buzz test on my truck some of the injectors can harely be heard. my question is can they be changed out with good sounding ones and can there be any performance gains?

thanks anthony
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post #2 of 13 (permalink) Old 10-08-2012, 08:11 AM
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Re: injector solenoid ?

A solenoid that is not functioning correctly is going to cause a loss in the performance of the engine. My advice would be to verify that the UVCH harnesses are in good condition first before you go replacing solenoids. Also check and make sure that the connections on both sides of the valve cover gaskets are unburnt and making good contact. It is very common to have burnt pins/connectors which will cause all sorts of problems.

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post #3 of 13 (permalink) Old 10-08-2012, 05:31 PM Thread Starter
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Re: injector solenoid ?

they are not burnt i just had to pull the injectors because of blown orings. i know all the connections are in good working order.
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post #4 of 13 (permalink) Old 10-09-2012, 02:12 AM
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Re: injector solenoid ?

If you measure the resistance of the injector solenoid, it should be about 2-3 ohms. Cheers!

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post #5 of 13 (permalink) Old 10-09-2012, 05:32 AM Thread Starter
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Re: injector solenoid ?

Quote:
Originally Posted by Patrick Feeley View Post
If you measure the resistance of the injector solenoid, it should be about 2-3 ohms. Cheers!
can that be measured from the outside of the valve cover?
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post #6 of 13 (permalink) Old 10-09-2012, 06:27 AM
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Re: injector solenoid ?

It is best to use an old injector pigtail to do the testing right at the injector as any extra wire is going to increase the resistance in the line.

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post #7 of 13 (permalink) Old 10-09-2012, 02:35 PM
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Re: injector solenoid ?

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Originally Posted by speeddemon31176 View Post
It is best to use an old injector pigtail to do the testing right at the injector as any extra wire is going to increase the resistance in the line.
For what a meter reads and how accurate it has to be in this case, horse hockey. You would have to either have even smaller gauge wire or lengthen the wire about 35 feet to see a difference.

Plus if the solenoid fails, it will have LESS resistance. I had one that was 0.5 ohm, the rest were 2.7-3.1 ohm. When I replaced the solenoid, it came back to 2.8 ohm.

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post #8 of 13 (permalink) Old 10-09-2012, 04:41 PM
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Re: injector solenoid ?

I was always told that the noise makes no difference. You could have 8 new solenoids make 8 different noises

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post #9 of 13 (permalink) Old 10-09-2012, 11:20 PM
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Re: injector solenoid ?

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Originally Posted by diesel_brad View Post
I was always told that the noise makes no difference. You could have 8 new solenoids make 8 different noises
I was told the same thing by two reputable injector builders on this board back in 09 when I was fighting my issues.
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post #10 of 13 (permalink) Old 10-10-2012, 03:09 AM
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Re: injector solenoid ?

Quote:
Originally Posted by Ranger50 View Post
For what a meter reads and how accurate it has to be in this case, horse hockey. You would have to either have even smaller gauge wire or lengthen the wire about 35 feet to see a difference.

Plus if the solenoid fails, it will have LESS resistance. I had one that was 0.5 ohm, the rest were 2.7-3.1 ohm. When I replaced the solenoid, it came back to 2.8 ohm.
Your right. I forgot that with all my years of electrical schooling that I don't know anything. Good luck fixing it.

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