Experienced rough running at startup until car warms up. Dealer replaced PVC valve cost $225. s105 engine light, codes P2178, P2180 P2190 and P2188
Next day same problem
Back to Dealer, informed #2 and #5 fuel injectors bad, oil saturated with gasoline, error codes P0305 and P0303 cost $2,154

Today same problem, oil saturated with gas. The suggested repair replace remaining four injectors at an additional $1,700 labor was free since it was just in the day before.

Has anyone experienced a similar problem? I have lost confidence in their ability to diagnose the correct problem and I am footing the bill for a fishing expedition. All injectors going bad at once seems like a stretch. Any tech experts out here?

thanks

 

I've moved your question from General Tech Help to X250 forum. This is the place to post technical questions about your model.

Graham

 

I share your suspicion about multiple concurrent injector failure. I had one go on my XK last year and the Jaguar Dealer (I was touring in Spain at the time and 1200 miles from home) suggested replacing the full bank of four. I declined and have had no further similar issues to date. Not the same model but sufficient similarity to make a useful comparison.

Dealers are known for jumping immediately to component replacement rather than systematically eliminating all other possible causes. In the case of P0303 and P0305 these are:

1. Check Engine Control Module (ECM) for related misfire DTCs and refer to the DTC Index.
2. Check the fuel system for blockages, repair as required.
3. Check the catalyst/exhaust system for blockage, repair as required.
4. Check and install a new spark plug(s) as required.
5. Refer to the electrical circuit diagrams and check injector(s) circuit for short to ground, power, open circuit.
6. Check and install new injector(s) as required.
7. Check for air leaks within the intake system.
8. Check and install a new camshaft position sensor as required

Following the injector failure, I did have them replace ALL spark plugs and do an oil/filter change to remove the effects of the over-fuelling contamination.

When an injector is suspect, switch it round with another one and see if the error code follows the change. This helps distinguish between a faulty injector and a circuit fault. A similar procedure is useful in checking on-plug coil faults. It's a lot cheaper troubleshooting technique than throwing parts at a Jaguar.

Graham

 

Thanks Graham, just now finding my way around the site.

 

Now I’m being told the fuel pump is cracked and leaking fuel. $2,357. I can see low fuel pressure causing the engine to run rough at startup and causing misfire but the car always runs smooth after a five minute warmup. Even with the six alleged bad injectors I can’t wrap my head around the fact that the car would run well with all these problems after initial start up. How far does this rabbit hole go?

 

Replacing a high pressure fuel pump seems to have cured the problem. As a bonus I now have six new injectors. I’m believing injectors were probably just fine. Chase and replace.

 

Thanks for reporting back and yes we have seen that Jaguar usually replaces all 4 on one side. So a bit unusual since they only replaced 2 injectors on one side?
There are 2 high pressure pumps mounted on the engine. Did they replace both of them?
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Glad you got it sorted. It's always very useful to other members to post the dealer invoice if you still have it. Thanks in advance.

 

"Thanks for reporting back and yes we have seen that Jaguar usually replaces all 4 on one side. So a bit unusual since they only replaced 2 injectors on one side?"

It's a six cylinder, Ace. Three per side.

 

Yes that's true but immaterial?

The Jaguar position is to replace the entire bank of injectors but we never got a real reason why? V-6 or V8 it does not matter.
Even Brutal stated they usually replace the entire bank. A lot more expense if not needed.

Just trying to figure out why they recommend that?
These DI injectors are so expensive.
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It's been reported several times across multiple sub-forums but apparently JLR insist that replacement injectors must be done as a "matched set" on each bank and replacing a single injector is a no-no. I can't recall ever seeing a detailed explanation for this, it could be legit or it could be yet another example of the service department extorting extra cash from the customer for unnecessary replacement parts (eg brake rotors).

 

The original problem was a coolant leak that required the supercharger to be pulled, airbag replacement and an occasional rough running on cold starts until the engine was warm. The leak was fixed and the PVC valve was replaced per fault code indication for the rough start along with oil service. Car ran fine going home, next day same rough start. Back to the dealer, informed major gas in the oil, fault codes indicated #3 and #5 injectors faulty, rich condition. Next day same problem, advised to replace remaining injectors and another oil change. That’s how all six came to be replaced. I asked for them to keep the car until the cold start issue was fixed. Apparently it was not because I was advised a day later one of the high pressure fuel pumps was cracked and leaking gas into the oil. I think that could have been the original issue. No mention of gas in the oil on the initial service. They say the first two injectors did need to be replaced since they were cracked. The other four probably not but they sold them to me at cost $326 each. Oh and free labor. Thanks. The coolant line was cracked, fuel pump was cracked and injectors cracked. Is cracking a common issue with engine parts on Jaguars? This is my first one. Thanks for all your input.

 

Plastic coolant lines cracking yes, but fuel pumps and injectors no.

 

You have had bit of bad luck with this hope its all sorted now for you . George