P1211 Stock Tuning

[caladash]

Yesterday pulling a 28 ft goose, i got the P1211 code climbing a small hill. This has never happened before. My chip is not installed so the truck is a bit of a dog with the H2E. Truck has 187k on stock injectors. Cleaned the IPR this morning. Did a hard run with the CTS hooked up after about 20 minutes of driving, saw 60 percent duty cycle at 2700 psi rolling into the throttle and of course the check engine light. Is my HPOP shot (Adrenanline) or do i have another issue? I did some datalogging with AE and saw 1000 psi while cranking.

 

[mandkole]

60% is pretty high, but I didn't think that a stock PCM would command 2700. What's the DC at idle? Id pull the VCs and look to see if oil is coming up around the injectors.

 

[caladash]

At idle i have 9.8% Injectors were reringed about 20 k ago.

 

[caladash]

Rolled into the throttle from 55 mph and ICP hit 1600 and dropped to 1500ish while still in the pedal. Not sure what the deal is.

 

[Power Hungry]

if you're hitting 60% with a stock ECM, you've got a problem. Either the HPOP is having an issue, the IPR is stuck/damaged, or you've got an o-ring/injector problem somewhere. A stock ECM on an otherwise mechanically sound vehicle should never really see over 45% DC on the IPR.

My first inspection would be IPR. If that checks out, I'd call DieselSite and ask their opinion on whether the pump may be failing.

Damaged injectors or o-rings is a hard thing to diagnose. The only real way to test that is pull the HPO lines and connect a hydraulic pump to the HPO rails, pressurize to 3000 PSI, and then close off line. The rail should hold pressure indefinitely, but anything over a minute is acceptable. If the pressure drops off immediately, there there is breach in the system. Keep in mind, the pressure may not drop to zero. It only needs to drop to the point that the system can maintain pressure.

Good luck.

 

[Arisley]

Good info Bill.

 

[02BigD]

Why don't you swap the IPR over from your X?

Or, drive it over and we can swap mine outta the red truck.

 

[Marty]

Do the icp test bill suggested when truck is up to operating temperature.

 

[caladash]

Thanks Bill! Gonna do the leak down test and buy an IPR. Dieselsite has a pretty fair price. Gonna start another thread for recommendations on a pump to pressurize the high pressure oil rails.

 

[caladash]

Updated the wrong thread on accident. Drivers head held from 3k to 2500 for a minute and 30 seconds. Passengers side a minute and 22 seconds from 3k to 2500. Motor was cold. Other crap was pulled off.

 

[caladash]

New IPR was swapped in. Drove for a while to purge the air and still the same issue.

Hot pressure test was performed. Pressure tested passengers side head, from 3000 to 2000 took 21 seconds then a minute to get to 1000 then just kind of sat there at 1000.
Drivers side took 42 seconds to get from 3000 to 1000 psi. Hmmmm.....

Time to let the burns heal!!

 

[Power Hungry]

21 seconds seems a bit fast to be leaking down. A couple suggestions...

First, check the pressure with the V/C off. There are small cap-bolt along the top of the head (see top of photo, right above the casting stamp) which can leak. Also, check to see if any bubbles or fluid is leaking from around the injector bores. Finally, check and see if any oil is weeping from the discharge nozzles on the back of the injector. (You'll need a flashlight and an inspection mirror to get a good look. The ONLY place you will not be able to verify will be the oring between the oil rail and fuel rail. However, this can be checked by looking for oil contamination of the fuel. This would be especially noticeable with a low tank since the fuel would be more diluted by the oil.

I hope this is helpful.

 

[POWER-STRUCK]

internal injector orings? doesn't happen often but is a possibility on old injectors

 

[caladash]

Ok well I finally got around to checking things out with the valve covers off. Well just the drivers side. Got the truck warmed up and comenced to burning myself! Got the cover off and fired it up to check things out. Every once in a while one solenoid would pop louder than the rest. Kind of odd. Pressurized the drivers side and looked and listened for leaks. Saw and heard nothing. Pressure did drop but didn't time it. Oil was changed not even 500 miles ago and I assumed since I'm pumping oil into the heads I would be over serviced by a quart or two. I checked it and im almost at the add 2 quart mark. So either it's the o-ring separating the fuel and oil or my motor is done! Gonna drain some fuel tomorrow. Completely pissed at this point I did some thinking. I could check the passengers side and find out it is an o-ring. Maybe even an injector. So....I'm just gonna buy new injectors. I'm at 190k on stock injectors. I can't justify reringing the ones I got. The $hitty part....Im selling my 12 valve I was gonna build for pulling. The money from that will be for injectors for both my 7.3s. Both are at almost 200k. 250/200s it is! Times 2! So, for those that have chimed in to help, I thank you.

 

[caladash]

Update: got the new injectors installed finally! Still got the 1211 code and now all drivers side injectors have the high to low open code WITH a new uvch. I'm thinking the pump might be my issue.

 

[caladash]

Latest datlog. Startup and idle.

 

[caladash]

No more codes except for the p1211 and now 1212. Just went down the road about 10 miles. Got home and now it won't start. Barey builds 320 psi of hpo. Duty cycle maxes out. Looks like the HPOP is coming out. During the test drive it felt great. Idle sounded off but I'm not used to hearing hybrids. Almost sounded like I have a gen 3 and 400/400's then it would clear up and sound different.

 

[caladash]

I figured I would update to finish this thread! Long story short it was the HPOP. So...truck has a new IPR, 250/200s, and a fresh Adrenaline. After the injectors were installed truck still acted up and then wouldn't even start. Started pulling the pump and the screen for the reservoir had metal shavings in it. Just enough to make me puke in my mouth a little. Got the pump out and it was able to be spun by hand. Didn't think this was right. Let's just say a new LPOP is in the truck and my spare motor rebuild is now priority! Gave Dieselsite a call and told them the HPOP was on the way. Sent it out on a Wednesday, they got it Friday, got an invoice Monday, pump was at the house Wednesday! Pretty impressed. Come to find out my pump was purchased in 09, mileage I put on it is unknown. Spoke to Bob for a while and asked him about my pump. He said when the pump was put on the test bench it made a god awful whine! A bearing had crapped and he has only seen it once if that! Our guess was something got in there and tore it up. LPOP shavings? Who knows. Old one was pretty hurt! Since it was from 09, it wasnt current. So for a fair fee it was rebuilt and is now up to date! Truck runs fantastic! My wallet is still sore and will be for a while. Let's just hope the rods last for a little bit! Thank to those helped!