Did some spirited driving last weekend. Car ran beautiful. Did a good 1 1/2 hour medium to hard drive and then parked. After 10 minutes sitting, started car, car ran like ****.

Heres the codes it threw.
P02F2 - cylinder 5 injector circuit
P0300 - multi misfire
P0305- cylinder 5 misfire
P1315- persistent misfire
P0302- cylinder 2 misfire
P02F2.- cylinder 5 injector circuit.

Oils clean and full. Coolant is clean and full.
Pulled plug # 2. Didn't look burnt. Put a new one in anyways. Going to swap coils from 2 to 4 and see if it changes code.
Looked for obvious vacuum leaks on intake pipes. Didn't find one. Am I missing any obvious vacuum leak locations or are there any plastic bits that could have melted in the heat?
I have new injectors coming. I'm hoping this is only a simple vacuum leak causing the issue.

Anyone else have this problem?

 

Any chance you had an o2 sensor update recently?

 

What about the plug on #5?

Lots of times one cylinder misfiring will set a second (or multiple) misfires as it throws off cycle timing just enough. 2 and 5 wouldn't be opposite each other, though.

How many miles on the car? It seems like it's got to be either an ignition or fuel issue. Did you buy the injectors pre-emptively or as a result of this issue? I'd try swapping injectors around in addition to coils to see if the misfire follows, and even then if you can have the car down for a short time find an injection specialist to see if your injectors could be serviced rather than having to replace them.

 

So I pulled Injector 5 and put in a new one. Now it runs great. I'll run some cleaner through heads and gas tank to break up any carbon buildup if there is any, Plugs were fine.

Lessons learned:

1. Do not buy the less expensive injector puller. The all gold colored one. They don't last on a stuck injector. You need the hardened steel tipped one.
2. Ensure you use the slimmer cheater tools from harbor freight. They really help.
3. While in there, you can deep clean parts you would never bother to clean with the side covers on.
4. Debating on whether or not to even put the side covers back on due to heat. Unless they actually serve a real purpose other than cosmetic purposes.

 

With these being direct injected, I question the ability of any in-fuel cleaner additives to do much of anything particularly in the most critical area, the back of the valves.

It may break up some carbon on the piston head or the tip of the injector, or even the spark plug. But even then unless it's being washed over those areas prior to ignition I do wonder whether it's doing anything at all.

 

Maybe I didn't explain it well enough. I'm sucking it into the intake by vacuum to clean the top of the valves in the heads.

 

Ah, gotcha. A la the Seafoam method?

Certainly should work better than running it through the tank, but typically the carbon deposits are really stubborn and require media blasting with walnut shells or similar.

 

Yes. But not sea foam. A stronger cleaner that actually works better. Dealer direct. My son in law is a mechanic and gets great products.

 

We have been told that Jaguar replaces the injectors in banks and not individually.

This seems like a waste and is expensive so glad to see a single injector was changed and fixed your problems.
Can you post a bit more about the Harbor Freight cheater tools? Not sure what these are?

Good job fixing it and posting your outcome. We get too many dead end threads with no solution for the next guy.
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