2014 3.0 Supercharged AWD. 58,000 miles.

Pulled onto the highway today and as I merged the engine started lugging terribly and power was way down. Felt like a bad misfire. Check engine light flashed and white smoke started pouring out of the exhausts. I pulled over as soon as I could to turn the car off, but the issue remained after a restart. I limped it home and had a string smell of gas plus the fuel usage shot up like mad. Smoked like a lawn mower.

It sounds like an injector failure but I won’t know for sure until I get it into service on Friday. I’m worried about the cats, if they got ruined because of the fuel being dumped through them.

Any ideas/thoughts? I tried pulling codes but got a NO LINK on my reader.

 

check the fuel pump under rear passenger seat

 

I’ll do that. Is there one pump or two for this engine?

The car never stalled, it just got very lumpy and sluggish and the engine felt very unbalanced. And the fuel clearly wasn’t being burned as the smoke pouring out of the exhausts and strong gas smell would attest to.

 

Have you looked at a turbo problem?

 

I have a supercharger, so no.

 

I had that exact problem pouring white smoke from exhaust ending with very pour running had to keep it racing to get home engine code came up P008B Low Pressure Fuel System Pressure - Too High, when I took it apart the fuel pump wiring harness had melted the connection to the flange /filter, picked up a used pump on Ebay with a new flange from Jaguar car started rough and then cleared out no more smoke

 

Most likely a failed (either leaking or stuck open) fuel injector or two, not uncommon on the AJ126 and AJ133.
If it is you need to get it fixed pronto as it could easily lead to total engine failure, either through bore wash leading to failed piston rings or hydrolocking.
Get a decent code reader on it asap and don't drive it any more until it is diagnosed/fixed.
And yes if it is a leaking/stuck open fuel injector the cat converter on that side could very well be ruined.

 

OK thanks for the info. It's about a 10 mile drive to my mechanics, are you saying NOT to drive it there? I can have it towed but it will be more of a hassle. I had to limp it home the day it happened, about 15 miles. I haven't driven it since.

 

Just an update on this: got a call from my specialist saying it was a failed fuel injector for cylinder #4, dumping fuel right through the system. Out of an abundance of caution they are recommending replacing all the injectors (so both banks) as in their experience when one bank fails another soon follows.