Diagnosing Bad Injectors - Ford Powerstroke Diesel Forum
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post #1 of 6 Old 01-30-2013, 02:37 PM Thread Starter
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Diagnosing Bad Injectors

I need help finding a bad injector. No telling what the Ford dealership will charge me to do a circuit test. My buddy suggested starting the truck and walking around with a temperature gun, shooting the exhaust manifold, and whatever cylinder comes out the coldest would be the bad injector. Any ideas? I would really hate to take my truck apart, replace an injector, and find that I didn't replace the correct one.
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post #2 of 6 Old 01-30-2013, 05:35 PM
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A contribution test is the best way I have heard of people using the thermo test but also doing the contribution test to back it up good luck if you have a bad injector it will run like S#!t
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post #3 of 6 Old 01-30-2013, 06:28 PM Thread Starter
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Right now it runs like skat when it's cold and intermittently on the highway. The good news is, its only a weekend/muddy day driver(thanks to the company ride). Bad news is, I replaced all eight injectors two years ago.
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post #4 of 6 Old 01-30-2013, 07:02 PM Thread Starter
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Oh and the other side of the contribution test is the fact that I would have to purchase an AE scan tool. Know anywhere I can get one for "cheap"? I say "cheap" because I know I will spend a good chunk of my tax return on it.
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post #5 of 6 Old 01-30-2013, 07:19 PM
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AE with the Ford module (YOU'LL NEED THE EXTRA STUFF) one of the best investments you can make. See the post below where I helped a user get his working and how AE helped him.
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post #6 of 6 Old 01-30-2013, 07:57 PM Thread Starter
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WOW! After watching videos and reading about the tool, all I can say is, WOW! I will be getting one of these bad boys soon. Very soon indeed. If only for the pleasure of having a new toy. On a side note, reading the thread you suggested makes me think that the $1400 I spent at a dealership in Tennessee on a new PCM was a waste... OUCH!!!! To bad I was on the road and desperate to get back to the great state of Texas.
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