Hi so I have p1316 with this message
Injector driver misfire-emissions damage/Misfire rate excess emissions.
I replaced coil and plug on the p0305 cyl 5 misfire which didn’t help. Does this new message mean a new injector for that cylinder please?
thanks
Alan

 

Alan,

Yeah, P1316 and P0305 do point towards a bad injector. Maybe a few other tests first to confirm and a few easier/cheaper things to try to fix it.

Do you have have a spark, is fuel pressure ok, are there any horrible pings/noises? Maybe run a compression test on that cylinder. Do you/have you run an injector cleaner through the fuel tank?

When I first got the car, years ago, I removed all the injectors and sent them away for professional clean/check up job. Seems to be the more probable way forward here.

 

OK lets see if I can help sort this out. Please bear with me if my questions seem silly.
1. Did you clear the codes after changing the coil and plug?
2. If you cleared them did they return?
3. What was the location on the engine of the coil and plug change? There is a lot of confusion as to cylinder numbering for Jaguars.
4. What coil and plug did you install?
5. Did you gap the plug you installed?
6. Did you clean the connector on the wiring before plugging it into the new coil?

Please post some answers and let's go from there.

 

I would bang a tin of BG44K in fuel tank at £20 it is acheap option and may clear the injector, it can't make it any worse?

 

1yes
2 yes
3 cyl5 @ cyl closest to front of car on drivers side US.
4 tried 2 different coils one orig Denso and an oem
thanks for the help guys but I have to surrender now as I don’t have a workshop.

 

Alan,

As someone else here in the Forum said, every man has to know his limitations particularly if you don’t have a workshop/tooled garage. So this isn’t a surrender!

Do let us know what your garage pro mechanic finds. I’ll put money on the injectors though! Hmmm....

 

 

So we all deserve a good laugh in these trying times so here's mine, you really cant make this stuff up!!!
First I completely agree with the mod who mentioned so many of these threads just fizzle out and nobody learns from those. I read a really long thread over several weeks of a chap who had tried moving the offending coil around only to still get the same codes. he even sent his ECU away for inspection and it came to pass that he had 3 bad coils that he had been switching around. No wonder he was very frustrated but that was really helpful to me because I vowed I would just pay for a new one and rule out all that hassle so thank you sir for closing the loop on that thread.

I may not be out of the woods yet but I promised you a good laugh... Having replaced the spark plug and then my offending coil twice with an oem and then an after market one I had reasoned it was going to be the injector because if anything things were worse. I was about to hand the car over to the pros for a new injector but i thought to myself I would wait till dusk, drive over to the vacant lot and do one final check that I had a spark. Because I don't have a workspace I had wanted the previous plug and coil replacement to be quick as possible so i had purchased a brand new spark plug socket, the one with the nice rubber insert that grips the plug so that you dont drop it or burn your fingers. So dusk rolls around and i pull the coil and plug and about to hook them together for the spark test when hold on a sec this coil looks a bit different to the original. Whats that rubber thingy on the end where it's supposed to wrap around the porcelain part of the plug? You guessed it, the rubber insert from the nice shiny new spark plug socket had stayed behind on the plug when I put the new one in and then got pushed into the coil sleeve. Once I got rid of the extra rubber a nice fat spark!

Drove it for a bit and as yet no cel but still feel a slight misfire at idle I think but nothing like before! I will do the BG 44 cleaner in the tank for a bit and report back. So after all this it looks like it may have just been the coil. Like I say you cant make this stuff up and thanks so much for all the responses.

 

codes/cel update
Codes:
When I use the icarsoft reader it says no DTCs (I still feel a misfire) but when I use my cheapie code reader it still shows the 2 original codes even after repeatedly clearing them. Odd but it says those 2 codes are "pending" along with the expected p1000. These 2 codes come up as p{code} space 'p' on the cheapie screen.
CEL
Also a bit odd, the cel goes off when I start the engine which is great and then part way through the test drive it doesn't actually come on, it just flashes about 3-4 times and then I never see it again. I know the flashing usually means cat danger levels but if it's that bad why dont I have a cel on all the time?
Thanks
Alan

 

So what are the pending codes? They're clues...

Your laws determine when a pending code is allowed to become an actual code (the details are a bit arcane beyond that) so some detail isn't quite happening.

 

Alan,
Engine misfires DTCs P0305x, with P1316, means that on the first trip (or second consecutive trip) an excess exhaust emission has been found and the Amber Check Engine MIL will flash. In your case, after 1 trip, the DTC is just logged (stored in memory buffer only), but then it is "Flagged" (stored in memory) on the 2nd trip and the CEL will stay on. Then the ECM will restrict things like 3000rpm, evap purge, adaptive fuel metering etc. It's just the way things are in our Jag.

 

Yes, the Jag system obeys the law, as described above.

They added the P1316 as additional help.

 

Ok so I had a shop replace #5 injector and so far touch walnut veneer it seems to be “cured”. Thanks to all who chipped in with helpful knowledge and opinions. Couple quick follow up questions.....
so I asked for the old injector and it looks to be “burnt” around the very end ( end that goes in the combustion chamber). Is that normal or sign of head damage? 53k miles runs well and so far no more codes. I could probably figure out how to post a pic of it...
Also at this mileage is it a sign that the other injectors are about ready to fail or is it a random one off thing?
Thanks again.

 

Most injectors have a bit of carbon/varnish on outside, temps in combustion chamber are high, but the working area is kept cool and clear with fuel/Additives going through it.
I put a can of BG44K in my petrol cars, BG244 in diesels, every other year , haven't had to replace any injectors on my cars and suppose I won't know if it works until I do.
But the cars do run a lot smoother after a tin goes in the tank?

 

All of our vehicles get a 20-ounce bottle of Chevron Techron down the fuel filler hatch at every oil & filter change. Never had an injector issue. Techron is indeed good stuff....

 

Yeah,

My cars also gets Cyclo Max 44 Fuel System Cleaner (selection very limited in Bahrain) and put through the fuel tank every 6 months or so. Also I change in line fuel filter regularly (2 year interval or so depending on mileage done). My Jag is a piece of cake compared to a Range Rover L322!

 

Yep I did the BG44k to try to clear the injector. It didn’t but hopefully helped the others stay clean