Why is this happening?

[Fear This: Cummins!!]

My '06 Mega-cab has had its fair share of issues. Now this one I have not experienced. Did a few searches here and could not come up with anything. So here it is. I'm driving down the road for about 20 minutes on Monday night and the "Wait to Start indicator light" pops on and the chime beeps for about 30 seconds give or take a little. The light then disappears and all is well. 9 miles later same thing happens. The beeping may have been a little longer this time.

This truck has to go 6 days a week starting in May. Any input as to what might be happening would be appreciated. Just don't want any surprises later that could be taken care of now!!

 

[Jim W]

I am not an expert at all but have you checked the electrical connections on the starter and the ground connections? What is the condition of the batteries?

To me this seems like an electrical connection problem either a corroded terminal or something is loose.

Just a thought.

Jim W.

 

[Prairie Dog]

Someone else had this happen a while back an was an indication of some sort of minor fault if I remember correctly. Wish my memory was better. .

 

[sag2]

Answered once already, but here it is again.



DIAGNOSTIC PROCEDURE P1222 - LEAK DETECTION DURING MOTORING

NOTE: For a complete wiring diagram, refer to the Wiring Information.

When engine is motoring (i. e. Engine is running, but requires no fuel injection) the only

required fuel delivery to the rail is due to natural leakage in the system. The natural

leakage depends directly on the rail pressure. A definite amount of fuel is required to

overcome the natural leakage, for different fuel pressures. The Engine Control Module

(ECM) sets Leakage Detected, when the fuel flow exceeds an expected value. When a

leak is detected in the system, a counter is initiated. When the counter reaches a

predetermined value a fault is set and engine derate is enabled. When the leak is not

detected the counter counts down, and once the counter becomes zero the engine is set

back to normal running conditions.

**A solid Wait to Start lamp will illuminate in the cluster along with chiming 10 times.

When the fault goes inactive, it will clear the wait to start lamp with no chimes**.

· When Monitored: Engine is motoring and at operating temperature with no fuel

system and engine speed related DTC's.

· Set Condition: Counter reaches a calibrated value.

Possible Causes

EXCESSIVE INJECTOR RETURN

NOTE: Always perform the Pre-Diagnostic Troubleshooting procedure before

proceeding.

OTHER DTC's PRESENT

1. Turn the ignition on.

2. With the scan tool, select View DTC's. Are there any other fuel system related DTC's

present along with this DTC?

a. Yes >>> Perform the diagnostics for the other fuel system DTC's before proceeding.

b. No >>>> Perform the INJECTOR RETURN FLOW TEST procedure.

18-006-12 -6-

DIAGNOSTIC PROCEDURE P1223 - LEAK DETECTION BASED ON QUANTITY

BALANCE

NOTE: For a complete wiring diagram, refer to the Wiring Information.

There is a required amount of fuel required by the fuel system to keep the system stable.

The amount of fuel required depends on fuel pressure, injection quantity, engine speed,

and coolant temperature. The Engine Control Module (ECM) sets Leakage Detected, when

the fuel flow exceeds an expected value. When a leak is detected in the system, a counter

is initiated. When the counter reaches a predetermined value a fault is set and engine

derate is enabled. When the leak is not detected the counter counts down, and once the

counter becomes zero the engine is set back to normal running conditions.

**A solid Wait to Start lamp will illuminate in the cluster along with chiming 10 times.

When the fault goes inactive, it will clear the wait to start lamp with no chimes**.

· When Monitored: Engine is running above low idle speed and at operating

temperature with no fuel system and engine speed related DTC's.

· Set Condition: Counter reaches a calibrated value.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.

Possible Causes

EXCESSIVE INJECTOR RETURN

NOTE: Always perform the Pre-Diagnostic Troubleshooting procedure before

proceeding.

OTHER DTC's PRESENT

1. Turn the ignition on.

2. With the scan tool, select View DTC's. Are there any other fuel system related DTC's

present along with this DTC?

a. Yes >>> Perform the diagnostics for the other fuel system DTC's before proceeding.

b. No >>>> Perform the INJECTOR RETURN FLOW TEST procedure.

 

[Prairie Dog]

I searched for this Sag, I really did but couldn't find it.
Thanks.

 

[Fear This: Cummins!!]

So sag2, I have a Power Edge EZ that has not been on for a couple of months. Just put it on 14 miles before this incident. Could the EZ have something to do with it. Also, with your post above, what would be the top culprits to cause this to happen?

 

[Bob4x4]

Adding rail pressure is hard on injectors

 

[DonFitzwater]

My truck just did the same thing on the way home today. The previous owner had installed a boost fooler and one other fuel add on so I'll be taking those off pronto.



Did you fix yours yet Fearthis?

 

[DonFitzwater]

Pulled a P1222 DTC, removed the boost fooler, ran the same route with the same load it happened with earlier and the DTC did not return. Not sure if the fooler had anything to do with it or not but will be keeping any eye on it.

 

[Fear This: Cummins!!]

No, I have done nothing so far. I need to tell the whole story though, now that I understand the situation a little better. Last July I had injector problems. I would start the truck and there was enough smoke created to block out the neighbors house. Dealer pulled all 6 injectors sent them off to be tested and 3 of them came back faulty. Dealer pulled a fuel sample from my Fuel Filter and it came back clean. They put 3 new injectors in, for free my I add (warranty expired 7/29/11), and sent me on my way.
Now they have a good Diesel mechanic. His non stock /stacked Cummins sits out front for all to see. But, maybe something was not torqued down completely. It is ironic that the Edge ez has been off the truck all this time and 14 miles after I have it back on this happens.

 

[DonFitzwater]

Good to know. I'd like to know if some of these minor power mods can create a condition that will magnify a minor issue like a marginal injector into scenario like we are having. Like I said, I ran my truck with the same load across the same route last night after removing the aftermarket stuff and the problem didn't return. I'm thinking about reinstalling the parts and running the same loop again for the test to actually mean something.



But, lets face it, I need a set of injectors (96k on the clock) and you probably do also, at least three maybe.

 

[DonFitzwater]

Ran the truck today with a small load (3000lb in the bed). Going down a long grade I decided to hit "tow/haul" to let the engine do some of the braking and the Wait to Start light came back on. I had hooked up my MAC Mentor and was watching rail pressure when it happened. It was running around 14k with no throttle, and about 2600 rpms. I cleared the code, ran the same patch of highway and hit tow/haul at the same time and it happened again. This was all stock... ... ... ..... Seems my idea of the boost fooler causing it was off.



So next will be to follow Sag's advice. I reviewed TDR issue 66, Andy Redmond did a write up on fuel return testing and a list of some test fittings and how/where to use them. I'll be ordering those on Monday and hopefully will be able to do some testing next weekend.

 

[DonFitzwater]

More to the story of Code P1222-I hit an on ramp last thursday on the way to lunch and my truck started shuddering just like my last truck did when I lost the torque converter. Backed out of the throttle and the shudder was still there, limped to lunch at low speed and by the time I shut the truck off it threw a P0303... ... ... ... ... . Bad #3 injector. Ordered a single injector and replaced #3, hard starting and P1222 cured!!!!!!!!!! For now.



Ran it this weekend on a long trip out of town, through the mountains and the wait to start light never came back on and the engine ran like a top.



Thanks again for posting that info Sag!