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The only test we as consumers and DIY'rs can do is the buzz test. People like Jonathan at DTC (choice #1 above) is capable of testing, fixing and modifying an IDM.
Well I've done the Buzz test multiple times. With the P1316 present it comes back with P1271, P1277, P1275 and P1274. Without the P1316 it comes back with no errors. Also reading other threads with the P1316 issue people speak of no power. I hit the go go pedal and it gets up and moves like normal. No smoke either. No rough idle. Only thing I do seem to have is a long start up. And higher than normal feel usage.
I didn't read the whole thread but from the list that is a couple posts up I didn't see anything on cleaning/ replacing exhaust bake pressure tube? This is known to effect fuel mileage, just a thought
when I replaced the exhaust backpressure sensor I cleaned out the tube that goes to my exhaust manifold.
Well I've done the Buzz test multiple times. With the P1316 present it comes back with P1271, P1277, P1275 and P1274. Without the P1316 it comes back with no errors. Also reading other threads with the P1316 issue people speak of no power. I hit the go go pedal and it gets up and moves like normal. No smoke either. No rough idle. Only thing I do seem to have is a long start up. And higher than normal feel usage.
That's what gets me. Codes for hi to low open on 3 passenger and 1 driver side. Like what the heck, normally it's all one side.
That's what gets me. Codes for hi to low open on 3 passenger and 1 driver side. Like what the heck, normally it's all one side.
Got a buddy you can swap IDMs?
Unfortunately I don't personally know anyone wIth a 7.3, let alone a spare IDM. And it is definitely all confusing to me. No rough idles, no stalling, always starts (well unless the stupid starter is acting up and I have to hit it.) At this point I'm wondering if my truck is just hating me because I fixed the mystery oil leak and it's not able to mark its spot anymore. LOL
Do the reset. It won't hurt anything to try and doesn't cost you anything but a few minutes of your time. All it does is wipe the PCM's learned memory, all the core functions will still be there.
Do the reset. It won't hurt anything to try and doesn't cost you anything but a few minutes of your time. All it does is wipe the PCM's learned memory, all the core functions will still be there.
Yeah I plan to do that. Definitely don't have any extra money right now.. Been out of work for almost a year now do to covid crap.
When I was getting p1316, it would always show up on the drive cycle after the event occured. I found it strange that this code always popped up at key on and never while driving. I read somewhere that it doesn't set the check engine light until the cycle after it's triggered.
For me it was injector shims. I reduced the shims to 0.001 on the ones I got codes for and p1316 went bye bye.
When I was getting p1316, it would always show up on the drive cycle after the event occured. I found it strange that this code always popped up at key on and never while driving. I read somewhere that it doesn't set the check engine light until the cycle after it's triggered.
For me it was injector shims. I reduced the shims to 0.001 on the ones I got codes for and p1316 went bye bye.
I believe that the injectors that I did shim I only used .002 on one or two of them. The others I believe I used .001. I know I had one injector that was good on one side of it but other side wouldn't allow anything under it. Tried to shim it and still wouldn't fix it..
Ok since the last time I was on here I tried the PCM reset and still was receiving the same P1316 code along with P1271, P1275, P1277 and P1274. So today I pulled the passenger VC and took solenoid and armature off #1, #5 and #7. One at a time. #1 had shims and removed then put back together. #5 had no shims, so swapped out armature and solenoid with an old injector I had in the garage. #7 had one shim and removed it. Put everything back together and ran test. I am concerned about one of the readings from the cylinder contribution test.(photo attached). Also ran ICP and IPR readings, not sure if within limits. (photo attached). P1316 came back but is only showing a P1274. So in the morning I'll pull the driverside VC and check #4 for shims.
I don't follow your reasons for removing shims and swapping solenoids. Did you measure them? But hey some codes went away so rock on.
Did you do the 50 cent mod? Did the injector harness look fully plugged in to the VC gasket?
ICP looks fine for idle. Need numbers while driving under load to know if the HPOP system can keep up.
Once all together monitor the PERDELS PID for all 8 and give us a screencap.
Contacted Bitterroot, they sell injector rebuild kits and also rebuild injectors. Told them what issues I was having and they said to pull shims.. I had gauged them after rebuild and all were within. 002 and .004.. But they stated sometimes injectors can be temperamental. Reason I swapped solenoids and armatures on #5 is because I couldn't think of anything else to do beside take a large hammer to it. LOL.
I'll take it for a spin tomorrow and check HPOP. Now how would I bring up that PERDELS PID thingy on FORScan?
As for my UVCH, there is no plug on the inside of harness. Only 9 pin attachment on outside. And it snaps together and locks..
PSI and % look good and CCT failure on #1 is pretty common. It's the end of the line for the fuel in that head so any hiccups show up there and #8.
I rarely see #1 fail CCT by itself. It’s ‘common’ to see #8 fail and many times #3 and #8 together. I think PERDEL over about 5% trigger CCT failure.
The P1274 needs to go away before P1316 can be addressed.
Those are aftermarket VC gaskets (Dorman?). It is possible that is the cause of P1274. You could swap VC gaskets and see if problem follows.
I’m sure Matthew at BDP gave you good advice.
Good luck, I think you’re getting closer!!
I’ve already forgotten why you installed shims - but, you’ve basically established your injectors need rebuilt. All of this f$&ckaround could end now if you go ahead and get some fresh injectors. I’m not sure if the high to low side open codes ‘hurt’ the IDM...
