So I just picked up my jaguar from timing repair and I got a reduced performance on initial start up with a rough idle. The shop restarted it and it was gone. They said with the car is extremely low on 3 week old gas (30 miles to empty) that may have caused it. He also said it says misfire is usually the injectors.

I got gas tossed in some luquimoly injector cleaner and it drove fine without issues. It felt a little lumpy idle in my butt but the rpm wasn't fluctuating.

Later on after it cooled down I restarted it to see if any codes. Boom restricted performance misfire 2,4,6,8 . After a restart it went away. One code says in the first 1000 revolutions.

I've had zero cel and restricted performance until this. This timing was done based on a noise and not due to a CEL or performance.

Thoughts on how to handle with mechanic? His comment was we worked on the front nothing behind the timing.

Thoughts???

 

maybe the timing is slightly off on one side of the engine? just enough for the car to adjust with the computer, but just enough to throw the codes on startup?

 

That's my thought as well. Or they damaged a sensor or connector on that side.

I wouldn't think all 4 injectors would go at the same time.

 

assuming that your codes refer to the jaguar numbering of the cylinders all
your misfire occurs on the driver side bank of the engine. So this is not the
side your mechanic encountered your timing chain problem .
Could be related to a fuel pressure problem or to a faulty VVT unit on this
side of the engine . Perhaps the locking mechanism of one of the VVT units was
damaged in the assembly process leading to bad timing in the engine startup process
as long as no oil pressure is available to control the VVT units by the ECU.
Regards
Ulrich

 

He replaced all timing components on both side, including the 4 VVT's. Unfortunately, I'm thinking this is going to be a challenge of showing it's something he touched.

 

I'm afraid you have to go to the dealer to isolate the problem
using SDD.
For sure SDD offers the possibility to monitor timing and do some test
routines on the system before digging into the engine again.
Hope you can find a mechanic who really knows how to work with SDD
beyond reseting a service code.
regards
Ulrich

 

Don't be so sure... https://www.jaguarforums.com/forum/x...ectors-178085/

Stranger things have happened!

 

The idle is rough but the codes are intermittent and have only happened at start-up.

After a restart limp mode goes always and so do do the codes.

Thoughts?!?

I think regardless it will have to go to the dealer for diagnostics.

 

okay have you refilled with new gas?
how long have you run the car with the new gas?
gascap tight? (stupid i know, but you would be surprised)

the sdd scan will tell you more specifics and then you can go back to your mechanic.

 

At the very least, I'd be checking the connections on the engine wiring loom, which goes to all fuel injectors, all the coilpacks, as well as the timing sensors and solenoids at the front of each bank (I'd especially be checking the connections to those). A plug not quite plugged into the socket might work until a vibration causes a signal that the ECU is unhappy with and it goes into limp-home mode.

Easy thing for you to check, anyway.

 

Thanks... I started that this morning, bc I couldn't stop worrying about it.

The indi is being cool about the issue. He said to drive it until I get a CEL or a code that doesn't go away or drop it off and they will try to get see what's going on.

He is very familiar with codes and issues. I was impressed with him telling me codes mean x without taking a breath. On a side note, he said if it was the cam sensor it would have a specific code.

On even a better note, he's discounting the cost of the install of injectors and letting me provide them.

 

Realize this is an old thread, but just had a similar issue with my 2010 XF SC. https://www.jaguarforums.com/forum/x...e-done-203923/

Curious about the final resolution here?

 

Just curious what you were charged to replace the timing chain and components, since this is potential in the future of a lot of these engines?

 

$5k with parts.