[FIXED] 2007 E-450 V10 misfire

So I volunteered to diag the chruch bus... Commuter bus with only 45,000 on the clock. I just put a scanner on it during my lunch break.

Fault Codes(9)
P0300-FF CMDTCs
Random Misfire Detected
P0303-FF CMDTCs
Cylinder 3 Misfire Detected.
P0306-FF CMDTCs
cylinder 6 misfire detected
P0316-FF CMDTCs
Misfire Detected on Startup (First 1000 revolutions).
P0460-FF CMDTCs
Fuel Level Sensor A Circuit
P2196-FF CMDTCs
HO2S11(Heated Exhaust Oxygen Sensor Right Upstream) not switching correctly. Sensor indicates rich.
P0300 pending
Random Misfire Detected
P0303 pending
Cylinder 3 Misfire Detected.
P0306 pending
cylinder 6 misfire detected

MIL not set

First, the o2 responds to a snap throttle but only ranges from 300-700 mv. At idle, it slowly switches from 300-700 mv. Bank 1 sensor looks normal. I'd say it needs a sensor and is unrelated to the misfires.

I can feel a multiple cylinder miss at cold and hot idle. It also misses on throttle tip in. (In neutral, I did not drive it)

So, all that to say that BBB now sucks and doesn't have an Ignition or Injector wiring diagram for any Ford V10.
Can someone post the coil and injector diagrams for me please? Thanks

You ain't kidding. BBB has nothing for this van. Nothing engine performance related, anyway. Hopefully someone else has access to SI for you.

Going for the low hanging fruit, I'd chase the tip-in misfire first. A primary ignition waveform from the coils will expose any weak coils/plugs. Once you gather enough evidence for more than one ignition problem, it's easier to build a case for replacing all coils and plugs.

The rich code is weird. :huh: And it doesn't explain the P0303. I'd be interested to see what a VE test says at WOT.

hi sir im not sure if o2 has bias voltage on a ford if you unplug sensor while backprobing you might get a bias voltage which should verify wires to computer also I would encourage you to give a little more info as far as engine size and year of vehicle sometimes we need to check for pertinent tsbs which may give direction because I am not sure of engine banks and stuff the nisfires may be all on one bank which sometimes gives direction I will help you as much as I can as it is an honorable thing to volunteer on anyone ones equipment the lord will thank you your reward will be heaven

I just was looking at a Ford 6.8L V10 firing order, from the front of the vehicle on the left starts 1-5 and the right side starts 6-10, so 3 and 6 appear to be on different banks. That was 2009, only by searching a browser

i.imgur.com/idnqRPN.jpg

Thanks friend

Tyler, I’m headed in the exact direction you described. Rail pressure is good, so the tip in miss has me headed to ignition first

Edited to add DTCs

PDM wrote: Edited to add DTCs

WHOA WHOA WHOA YOU ADDED A P0316?!?!




Kidding! :silly: You're certain to find a bad coil or two now.

LOL. Minor details :whistle:

Nothing like a good visual inspection. I was afraid this guy had caused some damage but a test light on the coil negative wire shows everything in tact and computer has control.




All coils check good at 0.6 ohms. But this shows coil 6 is dead. Trigger on coil 1




Coil 3




This was an easy one but it still feels good to collect this kind of dada for a DIYer

With two dead, what would you guys recommend? 10 coils and plugs?

10 coils can be costly, but so is a tow truck
It really doesn't have the miles to necessarily need all the coils either.
I guess it depends what they want to spend on the van.
I wouldn't be ashamed to do just the failing coils, all the spark plugs and just a good visual of all the coil boots while you're in there. The plug wells collect crap like it's their job so I like putting a squirt of dielectric grease in the boots during assembly.

PDM wrote: With one dead and one going bad, what would you guys recommend? 10 coils and plugs?

Every time. I used to sell individual plugs/coils, but got real tired of the "comebacks" when a different one would fail. Now they all get a set Motorcraft plugs and Denso or Motorcraft coils.

I agree Tyler. After thinking about it, I’m pretty sure others are going bad based on the struggle to rev in neutral

Noah, also the coils are under the fuel rails and the cab may have to be lifted too. That alone is a good reason to do all

Edited to fix my blunder in saying 3 was going bad. Not sure what I was thinking there. It has a shorted secondary or plug

I meant to say earlier, you probably won't have to pull the fuel rail to get the coils out. I never have on a Modular engine, anyway. Go ahead and pull it if it'll make your life easier.

You know, now that you mention it, I forgot the coil is doglegged on those

PDM wrote: You know, now that you mention it, I forgot the coil is doglegged on those

But it can still be a pain to get at the coil hold down bolts. Especially if the heads are rusty and swelled. In that case, definitely pull the rails and beat a sacrifical 7mm socket on.