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So for a while ive had a rough running issue but the truck still ran ok. It has consistently thrown a cyl 3 contribution code. Weekend before last i went to get pizza in the truck and havent really driven it much since i replaced the tail housing on the zf6. Got on the truck pretty hard and then had it stubling and sputtering. Checked codes via edge evo and had a cyl 5 & 6 misfire codes. I cleared them and they kept repeating. Ive driven the truck a few times since then and sunday i went to get a inspection. The truck idle was better and it ran fairly decent except when you would get on it hard then ot would start bucking. Once yhe load was lighter it ran fine. The cyl 3 contribution code is now gone but now i have a code gor random missfire on multiple cylinders. The ficm voltage looked good icp was good but now im wondering if i have a ficm logic problem along with injectors. Is there a way to diag the injectors outside of ids?
I had to get mine scanned with IDS when I had injector issues.
Have you put in the Blue Spring for increased fuel rail pressure?
Low fuel pressure is one of the worst ways to negatively affect injectors.
You might consider this if damaged isn't already done and then test.
There is but it takes way more time. If you can find someone locally with an IDS, you can have your answer in minutes as opposed to all the troubleshooting you go through to isolate an injector.
Even with the AE I have, it's not accurate. It's not until the PCM spits out a code that you have an idea as to what injector is failing or failed. I would also suspect the logic side as well and send it off to Ed to have it gone through.
If the injectors are bad, I'd look at some Ford remans and nowhere else.
Kinda what i thought. Im due for a oil change and leaning twards archoil with this next change. Let it ride for a bit and if that dosent cure it then ill talk to a few of the local shops and see if i can get it diagnosed. After watching several videos i bet i could probably use ids if it wasnt so dang costly. Im skeptical about the Chinese knock offs as well. As for the blue spring. I did that on my 06 and noticed nothing different. I replaced it when the upper fuel regulator started leaking. This truck had the same issue and i just replaced the gasket and save some money. Im starting to be more synical on all these upgrades. Before i start replacing parts i am more in line with knowing they are actually bad. I wish i had a way to test injectors out of the truck as it seems people throw tons of money on replacing all the injectors when 1 or 2 are bad. Im on a budget and dont want to blow a wad of cash on this truck. If it comes to that the truck is gone and ill stary over with a different one. I really need a long bed anyway and lately ive seen some cheap 6.7 trucks with the neighborhood of miles my 6.0 has. Sure they aren't lariats but you win some you loose some
Not to highjack the original thread but I too have an AE and the cylinder contribution test doesn't seem to be all that useful. I verified with an AE engineer that the test does turn of the computer compensation. I asked why you can't idle up with their test and he said the AE hardware would have to change to include a second input that accounts for the idle.
Did you just give up on the AE contribution test?
Originally Posted by Toreador_Diesel
There is but it takes way more time. If you can find someone locally with an IDS, you can have your answer in minutes as opposed to all the troubleshooting you go through to isolate an injector.
Even with the AE I have, it's not accurate. It's not until the PCM spits out a code that you have an idea as to what injector is failing or failed. I would also suspect the logic side as well and send it off to Ed to have it gone through.
If the injectors are bad, I'd look at some Ford remans and nowhere else.
[
QUOTE=Burgess090906;16766497]I was told by AE that you could idle up, then start the test. The RPM parameters would be used as a baseline of wherever you started the test.
The AE contribution test is mostly useless especially if you have the latest PCM and FICM calibrations. This is because the test is run with the FICM compensating for bad or weak injectors.
If someone has an IDS, they can disable FICM compensation allowing for an even amount of fuel per cylinder/injector. This is really the only way to properly diagnose questionable injector because now they're showing down their cards, no bluffing.
IF the injector is in that bad a of shape, if will throw a code as the injector has either completely failed or has reached the limit for the PCM and FICM to consider it failed. I know this for a fact because I've seen this SEVERAL times on trucks with bad injectors and the latest strategies. Including my own...
This is one of the main reasons why I don't like running the latest strategies.
It's Ford's Integrated Diagnostic Software. When coupled to the VCMII you can do everything the dealer can do as far as diagnostics and commands. You're able to turn off compensation to see the real health of injectors in a line graph. You can also shut off an injector to isolate problems.
Here's a sample of a bad injector on the line graph.
I checked with support at AE and you're right, the power balance does not fully disable compensation, which essentially makes it useless. Pretty disappointing. This test was one of the main reasons I bought AE a few years ago.
Originally Posted by Toreador_Diesel
The AE contribution test is mostly useless especially if you have the latest PCM and FICM calibrations. This is because the test is run with the FICM compensating for bad or weak injectors.
If someone has an IDS, they can disable FICM compensation allowing for an even amount of fuel per cylinder/injector. This is really the only way to properly diagnose questionable injector because now they're showing down their cards, no bluffing.
IF the injector is in that bad a of shape, if will throw a code as the injector has either completely failed or has reached the limit for the PCM and FICM to consider it failed. I know this for a fact because I've seen this SEVERAL times on trucks with bad injectors and the latest strategies. Including my own...
This is one of the main reasons why I don't like running the latest strategies.
