XJ ( X351 ) 2009 - 2019

Towed back home yesterday

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Old Jan 7, 2026 | 05:28 PM
  #61  
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Originally Posted by CuteCat
Here's where we are at at this time. Because of the potential of a catastrophic engine failure I shut her down and I had her towed back to the garage. Main concern, of course, was flooding the sump with fuel. After I established that it was not a stuck open injector, I noted then cleared DTC, then ran the engine, revving up to 3-3.5 rpm. Seems that what I had was temporary. Maybe a bit of carbon some how holding an injector open. Added intake cleaner to fuel system. She is at this point back on the road. But I don't trust this is end of it. One thing is the TSB about power cleaning the intake. Is anyone aware if the BG flush system is still available? Can a DIY mechanic get a hold of one? The TSB indicates BG offers the system to dealers for no cost. Anyone have any experience? What I can surmise, to use that system, you have to break into the fuel rail or use a Schrader valve that is common on some makes used to release pressure. If my memory serves the 4.0 in the wife's XK had the valve. At this point I'm not giving up on the bad sensors, although she's back on the road again, the codes didn't make sense. The thought of the computers going hay wire kinda dose. I'll look to see if I saved the bad injectors and post some shots.
Thanks again
Brian
Good. Hopefully it is transient and won't give you any further issues. If it does though, keep my suggestion in mind as a heat-soaked engine would present these problems, even worse than one that is called so transient nature could be related to that, but sounds like you may have driven it quite a bit since you posted this with no other issues. Just file it away as something to test and try if it crops up again and shoot order. 👍
 
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Old Jan 8, 2026 | 08:12 AM
  #62  
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"Transient" is a good word for "it will happen again, at the least opportune time". I hate chasing these kinds of issues.

BG44K is a fuel injector cleaning product you pour in your gas tank. It's been formally recommended by JLR on a TSB.
 
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Old Jan 8, 2026 | 08:13 AM
  #63  
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Originally Posted by NBCat
For the AJ133 from VIN V39427, the JLR part number is C2Z22844. The earlier VINs use JLR part number AJ812513.
Omg, thank you for this. The aftermarket piece has caused infrequent limp mode conditions requiring a roadside code clear to continue normal driving.

Searching the internet I cannot find any examples of people replacing this part. I don't remember why I chose to replace it when doing the valve cover gasket/coolant system job, but I did.
 

Last edited by Jaaag_drivah; Jan 8, 2026 at 08:28 AM.
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