P1222 help can't figure it out!! - Page 2 - Dodge Cummins Diesel Forum
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post #13 of 28 (permalink) Old 06-18-2013, 03:29 PM Thread Starter
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Bad fuel might cause an issue. Plugged filter and the FCA having to go longer duty cycle to provide fuel thats a possibility. COV dropping case pressure and forcing longer duty cyclce on FCA, possibility.

Time to test what you can looking for issues. The fuel system is compicated enough it could be one of many things cause downstream problems.

Buying reman injectors is a good way to get the problem. No way most of these places can adequately test what the injector will perform like in the truck. Some aren't even using the Bosch approved test benches for testing. Just how good the testing is will forever be a huge question mark. Too many variables to say definitvely.
word so new injectors are the way to go it sounds like. I guess I will wait till Thursday and see what the test comes back saying I hope its a prv not injectors.

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post #14 of 28 (permalink) Old 06-18-2013, 03:34 PM Thread Starter
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is there any simple tests I could do to maybe find out what it is?
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post #15 of 28 (permalink) Old 06-18-2013, 03:57 PM
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There is a ton of info on P1222 and "wait to start light on" on this forum.

Bottom line you have a fuel system problem in your truck. Read the TSB posted earlier in this thread over and study it closely.

It is most likely your injectors but as the TSB states other checks should be made 1st.

1. Re-torque all the injector connector fittings and tubes.
2. Check the pressure release valve in the rail. IMO the best way to really test it is to install a plug or the fitting that caps the rail.
3. Check the FCA in the CP3 high pressure pump. Does it rattle? It's not too expensive to replace.
4. Install a rail pressure gauge and see what your rail pressure is doing.
This will also test your high pressure sensor in the rail.


Failing all that, as the others mentioned, yank all the injectors and have them sent in to a reputable high end shop for testing.

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post #16 of 28 (permalink) Old 06-18-2013, 04:08 PM
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is there any simple tests I could do to maybe find out what it is?
Hello McFLy. Define simple
Are you reading or just posting. This is a painful read.
It's about 90% that you have an injector issue.
Swap FCA, COV, and RPRV with a buddies. Torque tubes on injectors.

Now on to injectors.

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post #17 of 28 (permalink) Old 06-18-2013, 05:01 PM Thread Starter
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Hello McFLy. Define simple
Are you reading or just posting. This is a painful read.

sim∑ple
/ˈsimpəl/
Adjective
Easily understood or done; presenting no difficulty.
Noun
A medicinal herb, or a medicine made from one: "the gatherers of simples".
Synonyms
plain - homely - unsophisticated - naive - artless

No need to be a douche I'm asking questions I'm new to this just like I said earlier
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post #18 of 28 (permalink) Old 06-18-2013, 05:57 PM
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It's a relative word isn't it.
You can listen to what so many have pointed out or choose to educate yourself by searching and trial and error.

The result will be the same. Fuel delivery system malfunction.

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post #19 of 28 (permalink) Old 06-18-2013, 06:23 PM
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is there any simple tests I could do to maybe find out what it is?
Tests, no. The test that tell you good info are relatively involved and require special tools. Things you can do, yes. Check the PRV, swap the FCA with a new one, change fuel filter, check pressure at the CP-3 inlet and rail.

Those are the simple things but require some knowledge and\or advanced tools.

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post #20 of 28 (permalink) Old 06-18-2013, 07:45 PM Thread Starter
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Ok did the fca and rail pressure test now how do I check the prv?
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post #21 of 28 (permalink) Old 06-18-2013, 08:08 PM
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Pull th eline fro the top of the PRV by removing the bajo. Tie a baggie or something around it to catch any fuel from it. Use carb cleaner to clean the PV well and dry it out so it is clean and dry.

Start the truck and at an idle, check for an leakage or wetness. If none disconnect the FCA t max rail pressure and let it idle for 30 seconds then hook the FCA back up. The idle and clatter should recover in under a minute. Check the PRV fro leakage or wetness. If it is dry your good to go, if you start seeing wetness any time replace it.

When disconnecting then reconnecting the FCA, if idle does not recover and the clatter dissipate in under a minute replace the FCA as it is bad.

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post #22 of 28 (permalink) Old 06-21-2013, 12:45 AM Thread Starter
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Pull th eline fro the top of the PRV by removing the bajo. Tie a baggie or something around it to catch any fuel from it. Use carb cleaner to clean the PV well and dry it out so it is clean and dry.

Start the truck and at an idle, check for an leakage or wetness. If none disconnect the FCA t max rail pressure and let it idle for 30 seconds then hook the FCA back up. The idle and clatter should recover in under a minute. Check the PRV fro leakage or wetness. If it is dry your good to go, if you start seeing wetness any time replace it.

When disconnecting then reconnecting the FCA, if idle does not recover and the clatter dissipate in under a minute replace the FCA as it is bad.
PRV is good! Injector test came back bad here comes some new ones! Pulling them Sunday! Sending off Monday! Thanks guys for all your help!!!
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post #23 of 28 (permalink) Old 06-21-2013, 12:52 AM
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So it was your injectors?

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post #24 of 28 (permalink) Old 06-21-2013, 12:54 AM Thread Starter
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So it was your injectors?
Yep sad enough. I guess we will see if it makes the code go away if it don't I will be pissed. But we will see.
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