I have a 2012 XJL, Supercharged model. I have read the previous posts and I wanted to see if anyone had experienced this before. My situation seems to be similar, but different (?). I was cruising along at about 30 mph, after just getting off the highway. I was making a U-turn and then about 100 ft later I turned into a driveway with a slight incline. That's when the car just started idling very rough and I'm sure misfiring. Then the check engine light came on, along with the restricted performance warning. I backed out of the driveway, drove to the nearest gas station, and added more premium gas (thinking maybe my last batch wasn't that good). Drove the car back to the house and disconnected the battery to see if I could reset something that would erase the error. The car wouldn't start from that point on and just turns but doesn't engage. Any insight into where to begin would be greatly appreciated.

You should pull the codes and work out what's going on. Could be almost anything at this point - guesswork won't help. If you pull the codes and post them here you'll likely get more thoughtful relies

Yep.... You're right. Pulled the codes and had misfires on 1,3,5,7 (P301,P303, P305, P307) then I got P300, P0016 and P0017. I assume the rough idling through the first set of codes (and possible other codes?). It was running at first, but when I stopped and tried to crank it again, it just turns without starting. Any thoughts?

Thanks

That sounds like a timing issue. Or maybe just a bad sensor Hopefully... But I'm no expert. I'd definitely have it towed somewhere to have it checked out. The timing systems have some known issue and it's best to make sure before driving it around even if you can get it started. ESP if getting p16, 17 and misfires.

Thanks PhillyS1. Bad sensor? MAF sensor or some other sensor possibly? I'm having it towed to a shop in the morning. I will have an update afterwards. I was hoping it was just the fuel pump... since it won't turn over. Sounds like it may be more.

From my experience with a similar issue. There are timing position sensors on cam and crank shafts and if they aren't Aligned perfectly it's possible the tensioner isn't keeping the timing chain tight, or maybe it's just a bad sensor, who knows? Good luck. I'm sure there's a million other things it could be.

Last time I experienced that same engine phenomenon, it was a plastic timing chain tensioner that failed and subsequently bound up the timing chain breaking the chain on one bank of my old XJ8. I don't know if the x351s have a similar timing chain set up. The failure came abruptly with way more miles. At only 63K miles, I would not expect a timing chain failure. However, If it is a timing chain issue, know this. The more you crank or try to run that engine, the more damage you'll be causing when the valves hit the top of the pistons and bend them. Very expensive fix.

Good information. The more examples you guys list the more I believe it is the timing belt. I noticed a weird sound like metal clanging when I pulled up for the last time in front of my mother in law's house. The good thing is that I have warranty that should cover most of the work if this turns out to be the case. I won't try to start it again. Thanks again for the info.

In case you want to look up the codes, add in the missing 0!
P3 -> P03 etc.

Have heard the same type of problem and it was 4 injectors on one side of the engine needed to be replaced?


Have you seen this thread?
https://www.jaguarforums.com/forum/x...ectors-178085/

Let us know what the problem was if you can?
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+1 That sounds like the injector rail issue

Would the injectors failing throw a P16 / 17?

A jaguar specialist is looking at my car now. I will update the thread after he lets me know the damage . Thanks!

Good luck!!

So the jaguar guy came back and said the engine locked? No overheating, the codes didn't match that. I assume the timing chain broke while driving and caused catastrophic damage to the block. I have a warranty I purchased when I purchased the car and should cover this. Opening a claim tomorrow..... Well the shop is handling the claim for me. Bummer. I'm sure I will be down for at least 2 to 3 weeks.

In my experience you might want to at least double that.

Dang. Hope not.

Thats what I feared, darn man, that's terrible news. And very similar to the problem with the mechanics special XJ I bought to fix up and do a full motor swap, Glad you have the warranty. Good luck

Thanks everyone for your help!

How can the engine be locked if you can turn it over with the starter?
How can the engine run if the timing chain is broken?

The engine should have locked up completely/immediately if the chain broke. No more cranking over and no more running?

Neither of these things make any sense?
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