When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
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...
Yeah I'm going to address #4 this morning and try to resolve this issue. Reason I shimmed a few of the injectors was because I couldn't get the .002 gauge to slip under the armature. As for the UVCHs I went to Ford first and they had none in stock and they told me to go next door to Napa and get the Dorman ones.
As for purchasing new injectors right now isn't in my budget just yet. Been unemployed since March of last year due to the Covid crap. Luckily I have been called back to start work next Monday. YAY.. I'm a Structural Airframe Mechanic. So once I get a few checks in then I definitely can afford new ones..
I'm really considering looking into saving up some money and purchasing a secondary vehicle and then buy another 7.3 engine and swap them out then rebuild the old one and then keep it as a stand by. LOL
Ok, as I said earlier today I completely went through the known injectors that were giving me issues. Ran for a bit and ran the normal test. And just when I thought I beat the dreaded P1316, it came back and points to #4. Bitterroot suggested swapping #4 with #2 and see if it follows or stays on that cylinder.
I pulled up the PERDELS for the injectors and they stay at 0% unless I rev it and then #1, #2 and #8 come up. (Photo attached). Then drove at around 40 mph and watched levels. (Photo attached) and then at idle with warm engine. (Photo attached)
Probably what I'm going to end up doing is just buying new injectors once I get a couple pay checks in the bank. Then see what happens with everything.
Yep PERDELS can only be measured at idle with trans in drive and truck stationary. The test measures relative cylinder speeds and shows how they compare. Required test conditions for that are natural idle (no throttle input) and uniform load. Simply cannot be measured with changing RPMs or irregular load from driving.
HPOP numbers look fine for goosing the throttle a bit while not under load. Thinking that system is all good.
A great test of everything is swap injector 1 and 5, see if the bad PERDELS follows. If yes you confirmed a crappy injector.
Yep PERDELS can only be measured at idle with trans in drive and truck stationary. The test measures relative cylinder speeds and shows how they compare. Required test conditions for that are natural idle (no throttle input) and uniform load. Simply cannot be measured with changing RPMs or irregular load from driving.
HPOP numbers look fine for goosing the throttle a bit while not under load. Thinking that system is all good.
A great test of everything is swap injector 1 and 5, see if the bad PERDELS follows. If yes you confirmed a crappy injector.
What oil are you running?
Oh ok, truck was in park. And those numbers were after I touched the go go pedal. I use 10W-30 synthetic.
Thanks for the info, just changed #4 injector yesterday and did the test this morning attached is what I'm getting so far. I'm guessing that each PERDEL should be 0%. Not really sure though.
Generally, you don’t feel a ‘miss’ until close to 10%.
It’s typical to see 1-4% on #8 and sometimes #1 and #5.
Ah ok, but I'm confused though. #4 is a new injector but has a reading of 5.13%. Shouldn't it be around 0% Truck feels like it may have a slight miss, but currently there are zero errors on buzz test. Nor is there a pending P1316 or any other codes coming up.
Ah ok, but I'm confused though. #4 is a new injector but has a reading of 5.13%. Shouldn't it be around 0% Truck feels like it may have a slight miss, but currently there are zero errors on buzz test. Nor is there a pending P1316 or any other codes coming up.
Either it’s not a very good injector or there may be something else going on with that cylinder.
How many miles since injector swap/putting air in the fuel and oil?
Either it’s not a very good injector or there may be something else going on with that cylinder.
How many miles since injector swap/putting air in the fuel and oil?
21.7 miles on injector right now. Went by Diesel shop and he confirmed I have a slight miss. Couldn't determine which side off hand by just listening by ear. Then started pouring down rain. Suggested I contact Test Calibration in Mobile, AL to start with four new injectors and place on driverside. Then go from there.
Unfortunately from Advance Auto since really no good local places near me that I knew about. Cost me $239. Diesel shop suggested Test Calibration in Mobile, AL. $195 a pop. LOL Odd thing is there is no noticeable power loss and getting roughly 12.7 miles to the gallon now. Was getting 9-10 miles when I was having other issues.
