Remove fuel injectors from 92 XJS 5.3 litre.
#1
02-24-2019, 05:31 PM
Remove fuel injectors from 92 XJS 5.3 litre.
I'm going to preface this by saying my car is running really well but at the last service the mechanic says there was a feint smell of gas around the injectors and advises removal of the fuel rail and injectors. Knowing the reputation for these cars to burn up I will definitely do it. My question is, is this a job that a car owner can take on or should I leave it to the pros? What really bugs me is if I can it in to a shop it will take weeks for the injectors and fuel rail to be sent away for refurbishing.. Thanks in advance.
#2
02-25-2019, 01:52 AM
Veteran Member
Does your engine have the fuel rail linked to the injectors by a shortish flexible hose, or are the injectors directly pugged into the fuel rail? This is the main difference between the earlier HE and later fuel rail injector fixing method. Either way if the car is running fine I doubt the actual injectors need anything done to them. All you need to do is to replace the various rubber seals (and short hoses if they are there) that make the seal between the injector, the fuel rail, and the manifold. Kits are available with all the bits needed (google Mr Injector XJS injectors, for example) but be sure you get the kit for the type of rail/injector your car has. The work is straightforward and easily doable at home in your garage, but requires patience and care, and loads of people on the forum can help if you get stuck or need advice.
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#4
02-25-2019, 03:31 AM
Senior Member
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#5
02-25-2019, 05:34 AM
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#6
02-25-2019, 05:51 AM
Veteran Member
Caution is always advised, and avoiding damage to the barbs on the injectors is crucial.
That said, I have used a pocketknife to remove the hoses from my injectors repeatedly without damage. A proper blade is required. I use a 1.5” double curved blade. The tip curves inward towards the center of the blade not just on the sharp side, but also on the flat side.
Stab the hose above the injector, insert blade sharp side out, away from the barbs, flat side riding on barbs. Press straight down driving the point into the ferrule. Stop. Bend hose away from cut. The bottom of the hose will rise up out of the ferrule as the barbs pass into the spreading cut slit. Cut the remaining circlet of hose, again blade flat to barbs sharp edge out. Pop! off she comes. Once practiced at the technique it takes thirty seconds or so per. No scars on barbs or ferrules.
No warranty expressed or implied. YMMV. Don’t blow yourself up.
That said, I have used a pocketknife to remove the hoses from my injectors repeatedly without damage. A proper blade is required. I use a 1.5” double curved blade. The tip curves inward towards the center of the blade not just on the sharp side, but also on the flat side.
Stab the hose above the injector, insert blade sharp side out, away from the barbs, flat side riding on barbs. Press straight down driving the point into the ferrule. Stop. Bend hose away from cut. The bottom of the hose will rise up out of the ferrule as the barbs pass into the spreading cut slit. Cut the remaining circlet of hose, again blade flat to barbs sharp edge out. Pop! off she comes. Once practiced at the technique it takes thirty seconds or so per. No scars on barbs or ferrules.
No warranty expressed or implied. YMMV. Don’t blow yourself up.
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#7
02-25-2019, 03:29 PM
Veteran Member
A 92 will most likely have the O ring injector rail not barbed hoses. If this is the case buy a kit that comes with 24 O rings and filter baskets. Be careful when ordering to make sure you get the correct kit, earlier kits will only have 12 O rings because of the barbed injectors.
Replacing them is relatively easy just unbolt the fuel rail and the injectors will come away with the rail. The injectors have clips to hold them in the rail. Remove the clips and pull the injectors.
Use an O ring pick to remove the old O rings and install the new ones along with the filter basket.
Replacing them is relatively easy just unbolt the fuel rail and the injectors will come away with the rail. The injectors have clips to hold them in the rail. Remove the clips and pull the injectors.
Use an O ring pick to remove the old O rings and install the new ones along with the filter basket.
Last edited by warrjon; 02-25-2019 at 03:31 PM.
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#9
08-06-2020, 12:15 PM
Member
Hi Beaterbeliever,
You have in this thread a myriad of potential failure modes leading to rough idle, but may I recommend application of Occam's Razor, and work through the most simple and straightforward items (such as vacuum leaks from bellows) before moving on to complex solutions (such as ECU failure).
You will find this approach to be more satisfying when successful, and significantly less costly.
All the best,
Jerry
You have in this thread a myriad of potential failure modes leading to rough idle, but may I recommend application of Occam's Razor, and work through the most simple and straightforward items (such as vacuum leaks from bellows) before moving on to complex solutions (such as ECU failure).
You will find this approach to be more satisfying when successful, and significantly less costly.
All the best,
Jerry
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beaterbeliever (08-06-2020)
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