When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Having some issues with my 03 STR. The car's been stuck in RP mode for last little while with some codes being thrown. All implying issue with cylinder 7 misfiring. I've managed to remove all codes asides from P0207. I initially switched the coil of cylinder 7 with another coil to rule that out as the issue.
I also changed all 8 plugs with denso iridiums (was planning on doing this before the issue began). Everything seems to check out in terms of the plugs and coils. Even with a coil from a different cylinder the P0207 code persisted. I believe I have a faulty injector on cylinder 7. After reading another old post I also ensured the intake and MAF sensor were on tight and were clean. I also ensured to the best of my ability, that the wiring was in adequate condition for injectors. No matter what I have done, the code persists leading me to question the integrity of the injector. I can say for sure, that this is the first time I've ever had an issue with an injector for any of my vehicles.
This leads me to my question. I'm hoping someone had some experience with this or some type of information to offer. Does the supercharger absolutely need to be removed to replace and injector? JTIS mentions removal of charge air cooler and that line was quite intimidating to say the least. I haven't ever removed the supercharger but I could manage with due diligence and extensive reading. I really don't prefer this but I'm up to it if need be. What's more daunting is the thought that after having removed everything, the injector checks out and the issue persists.
I'd love to know what you guys think. Any recommendations? Below is the scan report.
Have you done electrical tests to rule out wiring etc?
I'm thinking it would be very annoying to swap the injector only to find it wasn't bad.
Hi,
I am about to take a multi-meter out to the car right now to check the readings (ohms) to verify. All 7 other injectors check out. I could be wrong, in my mind bad wiring would affect more than just one cylinder.
You would normally check the wiring right back to the PCM.
To be able to control each injector individually they clearly cannot be connected together! (See the elec guide, too. That & the workshop manual are generally good places to start).
You would normally check the wiring right back to the PCM.
To be able to control each injector individually they clearly cannot be connected together! (See the elec guide, too. That & the workshop manual are generally good places to start).
I disconnected the lead from injector 7 (back left passenger side) and put the MM to the terminal. I got a reading of 1. In other words no reading at all. The wiring looks good as far as I can trace it. I should've noted that I got this problem after going for a car wash. I don't know if its just a coincidence or what but injector 7 is not getting a reading. I might go buy a mechanics stethoscope to listen for the normal clicking type sound of a functioning injector but at this point I feel like it is the injector.
It presumably would not click whether the inj is faulty or the wiring is, so I'm unclear what you'd prove.
There isn't anything else I can do at this point. Injector 7 has no reading when hooked to a mm. This rules out wiring as the wiring from the injector was removed to test just the injector. I put the positive and negative leads from mm to the 2 terminals on the back injector with the clip removed. I got a reading of 1. The injector is definitely faulty. Could it also be wiring in conjunction with a bad injector? Absolutely. I hope not but it definitely can be both. At this point only the injector has been tested. Ive checked the wiring wherever it is accessible to check.
I am on the path to change the injector. Seems to be where everything is leading to. Do you know if the SC needs to be removed to replace fuel injectors? It doesn't seem like enough room but I'm not sure. I appreciate your input. Thank you.
I've never had to change an inj - but I recall old posts about people having them cleaned/refurbed so if the posters are still around they can probably advise.
(E.g. in case one is clubairth1 he's around, though now has an XF)
It presumably would not click whether the inj is faulty or the wiring is, so I'm unclear what you'd prove.
There isn't anything else I can do at this point. Injector 7 has no reading when hooked to a mm. This rules out wiring as the wiring from the injector was removed to test just the injector. I put the positive and negative leads from mm to the 2 terminals on the back injector with the clip removed. I got a reading of 1. The injector is definitely faulty. Could it also be wiring in conjunction with a bad injector? Absolutely. I hope not but it definitely can be both. At this point only the injector has been tested. Ive checked the wiring wherever it is accessible to check.
I am on the path to change the injector. Seems to be where everything is leading to. Do you know if the SC needs to be removed to replace fuel injectors? It doesn't seem like enough room but I'm not sure. I appreciate your input. Thank you.
I've never had to change an inj - but I recall old posts about people having them cleaned/refurbed so if the posters are still around they can probably advise.
(E.g. in case one is clubairth1 he's around, though now has an XF)
ok thanks, I'll keep that in thanks. I just hope the SC doesn't have to come off cause that's a long, long job.
Before disassembly and replacement of anything else, check the wiring loom and connectors for moisture as that can cause an open circuit, which is indicated by DTC P0207. Also, make sure there is no moisture evident around the PCM.
The charge coolers must be removed to access the fuel injectors.
Before disassembly and replacement of anything else, check the wiring loom and connectors for moisture as that can cause an open circuit, which is indicated by DTC P0207. Also, make sure there is no moisture evident around the PCM.
The charge coolers must be removed to access the fuel injectors.
HI NBCat,
I appreciate your input. Been spinning my wheels so to speak, on how to proceed. I will disconnect all injector wiring and give the terminals and wiring some compressed air along with the PCM wiring. Worst case, do you know if the supercharger needs to be removed to remove charge air coolers? Or can the charge air coolers be removed without taking off the entire supercharger?
If you do remove the charge coolers consider going further and remove the entire SC so you can replace the under SC rubber coolant hose that will fail after 10+ years or so. Yes it's a tough job. If you plan to do it here is a few links with many great suggestions that greatly helped me when I did it. Please follow the advice because I did not and got to do it all over for a second time! Yes it's much faster/easier the second time around! Under SC Hose Repair
I had a 2005 STR and was planning on getting the injectors cleaned and flow balanced as there is a shop in town that does this. But I never did do it because I never had any injector problems?
I have a 2014 XJR now but my STR was a daily driver for 6+ years and over 100K miles.
It was a very good car that I sold for pennies because used Jaguar's just aren't worth anything!
.
.
.
The charge coolers can be removed without removing the supercharger.
Originally Posted by clubairth1
If you do remove the charge coolers consider going further and remove the entire SC so you can replace the under SC rubber coolant hose that will fail after 10+ years or so. Yes it's a tough job. If you plan to do it here is a few links with many great suggestions that greatly helped me when I did it. Please follow the advice because I did not and got to do it all over for a second time! Yes it's much faster/easier the second time around! Under SC Hose Repair
I had a 2005 STR and was planning on getting the injectors cleaned and flow balanced as there is a shop in town that does this. But I never did do it because I never had any injector problems?
I have a 2014 XJR now but my STR was a daily driver for 6+ years and over 100K miles.
It was a very good car that I sold for pennies because used Jaguar's just aren't worth anything!
.
.
.
Yes, I am considering just that! It would be ideal to change the under SC hose. Although I've personally done quite a bit under the hood of my STR and I'm confident working on it, despite the laughable level of accessibility, I am hopefully not over confident as to mess up more than I fix. I am planning on replacing numerous OE hoses to aftermarket silcone hoses that are virtually bulletproof in terms of heat absorption and elasticity/ tensile strength. Now might be the perfect opportunity even if i have to wait a couple weeks for parts.
A company called HPS Performance manufacturers silcone hoses for high(er) output engines. Just send them the part number and they can price out their silicone hoses to replace OEM hoses. They are more durable and long lasting. I am trying to get prices for all 20+ hoses in the STR. A bit overkill but doesn't hurt I guess.
Well that is just fantastic news! Looking forward to your list!
I know in the Mustang world they have had aftermarket silicone hoses for decades and that is EXACTLY what Jaguar should have done from the factory!
It's such an expensive car I can't believe an extra $500 (or less) in cost would not pay back with much lower warranty costs because of all the cooling system problems Jaguars have.
Oh and if you read my link don't do what I did and lean on the top coolant reservoir and crack that stupid weak plastic nipple!! My top tank was not even a year old when I broke it again.
.
.
.
I'm about to take on the job tomorrow (at least the taking apart and removal part until all parts are in order). Just a quick question. Asides from the valley pipe and knock sensor, what other hoses, pipes, gaskets, and seals should be replaced when removing the SC? The SC duct seals are the obvious ones that come to mind. I would probably need new intake gaskets that are underneath the charge air cooler as well im guessing. Is there anything else pertinent that should be addressed with SC off? Knock sensors and valley pipe excluded.
P0207 Cylinder 7 A open circuit
