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Fuel injector failure

Discussion in 'VF Holden Commodore (2013 - 2017)' started by jono67, Nov 20, 2018.

  1. immortality

    immortality Home of the smoky breakfast Bacon! Staff Member

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    Seems like an odd comment, fuel injectors should handle the fuel types they are designed for, if the plastic is failing than it's a design flaw or manufacturing fault.

    As for the boost reference, either the injectors are a higher flow (in which case a re-tune would most likely be required) or higher pressure capacity but I'd rather think he's talking rubbish. When running boost you need to increase fuel pressure, if you don't you actually reduce the amount of fuel an injector can flow. I'm not sure what the LS3 factory fuel pressure was set at but as an example, a lot of common injectors are rated at 3 bar or 43 psi, that means there is a 43 psi differential between the inlet port and discharge nozzle in the injector, if you were to put that same injector in a blown motor that makes 43psi of boost pressure in the manifold you then end up in a situation where the boost pressure pushing back against the injector discharge nozzle is the same as the fuel pressure which means you have exactly 0 differential pressure across the injector which means you have 0 fuel flow. I know the LS1 motors ran a dead head fuel system (with the pressure reg at the tank) which is ok for a n/a motor but IMHO for a blown application a return style fuel system that is boost referenced 1:1 at the motor is much better as maintaining the correct fuel pressure differential across the injector is better and more consistent which makes tuning better/easier.
     
  2. Billyt69

    Billyt69 New Member

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    2015 VF2 SSV. I had an injector fail April 2018 & replaced by Castle Hill Holden, Under warranty. A few weeks ago another has failed.

    Both times for months prior I noticed a small baulk/pause when accelerating, but it later progressed to a misfire.

    Had it in for service anyway 3 weeks ago & was told all 8 injectors will need to be replaced, they will put in claim for replacement under goodwill (requires HO approval) not sure how long that takes. Advised to avoid driving as much as possible in the meantime) Still no call back & i called but couldnt get through to Service Dept on Monday, left a message but no one called back. (Castle Hill Holden again) i'll chase them up again tomorrow.
     
  3. Myfirstv8

    Myfirstv8 New Member

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    Interesting.... my 2015 Caprice V has only done 60,000 and needed new injectors. I thought 8S were bomb proof. My dilemna is..... 400km after the injectors were done, I fill up with 98 high performance and it immediately started using enormous amounts of fuel...
    I was towing a trailer for 230km and its avg use was around 13.5 l/km. As soon as I filled and drove off it skyrocketed to 19 l/km!
    Half a tank to do 200km. What has happened? Is it dirty fuel or are the injectors faulty? Is it computer issues?
    I can't emphasise enough that it was immediate!
    The terrain was flatter than the first part of my 500km trip. The weather was calm. I cannot figure what happened and why immediately after my fill?
    I have heard that Holden has a problem with injectors??? Is this the case?
     
  4. GoatVR46

    GoatVR46 New Member

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    Bro i just had the same problem with my 2013 vf ssv redline. Turn the car on service esp pops up and got 2 code 1st fuel injector circuit / open cylinder 8 2nd cylinder 8 missfire
     
  5. jono67

    jono67 Member

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    So you had all the injectors replaced at 60 000km? If so, when was that?
     
  6. jono67

    jono67 Member

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    Goat contact your local Holden dealer. Does not matter if way out of warranty, it's an issue with all VF's we are finding. They should be replacing all 8 injectors, at no cost to you. If they don't come to the party, ask them to contact Holden head office. Let us know how you get on.
     
  7. Lowman

    Lowman New Member

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    Bought a 2016 SS Redline 2 months ago. Went to go down the street this morning and the engine light came on. Took it to the local mechanic and low and behold cylinder #2 misfiring. Not very happy, its only got 51K on the clock also
     
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  8. jono67

    jono67 Member

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    Mmmm, welcome Lowman. Getting a few new members to this forum with their first post being this issue. I would love to know how many cars Australia wide Holden have had to replace injectors for now. Having a recall has been discussed pages back, and although not necessarily a safety issue, it's an issue.

    You have to think at some stage most VF's will experience this problem. Would it be too much for Holden to send out letters to those whom they have details for saying there is an issue with the injectors, if you experience a, b or c, please take your car to your nearest Holden dealer.......???

    By the way Lowman, you should be taking your car to Holden, I hope you haven't forked out $ for you mechanic to replace the injector?
     
  9. immortality

    immortality Home of the smoky breakfast Bacon! Staff Member

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    Holden do a recall? you must be kidding. Check out the electrical steering failure thread and see how long it took Holden to initiate a recall for something that has major safety implications.

    I totally agree that it should happen but I'd bet against it.
     
  10. Skylarking

    Skylarking Well-Known Member

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    Oddly, within that electrical steering failure thread, the number of comments from enthusiasts commenting it was not such a serious issue to require a recall is surprising. So, then trying to rationalise how in such a world an injector failure could ever be considered a safety issue requiring a recall would be headache inducing.
     
  11. immortality

    immortality Home of the smoky breakfast Bacon! Staff Member

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    But they were sure to fix the issue promptly with the US police vehicles where the issue of liability is greatly increased....
     
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  12. Smashfist

    Smashfist Active Member

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    It's actually true. Bosch and GMH together decided that they could investigate and rectify a manufacturing failure in the injectors (it's suspected either a plastic composite fault or porosity within the moulding), or they could not bother and use a boost rated injector of the same flow that was already available on the shelf, which is already manufactured in a slightly different way to withstand higher external pressure. $$ wins out and they went with the off-the-shelf solution.
     
  13. immortality

    immortality Home of the smoky breakfast Bacon! Staff Member

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    Why would they fit a boost ready injector on a non boosted engine?
     
  14. Smashfist

    Smashfist Active Member

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    Because it's cheaper than re-engineering the non-boosted version of the same type and flow rate?
     
  15. Lowman

    Lowman New Member

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    Gday mate, yeah ill be knocking on the service departments door first thing tomorrow morning. And will be telling them I need a loan car as I my car is used for work and my job is impossible without one! As well as reimbursement for the mechanics fee to diagnose the problem in the first place. See how we go???
     
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  16. Myfirstv8

    Myfirstv8 New Member

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    [QUO
    TE="jono67, post: 3017433, member: 143389"]So you had all the injectors replaced at 60 000km? If so, when was that?[/QUOTE]
    I bought the Car in February. I have only had it for two months. (always wanted a V8)
    One morning, with no warning, I started it up and it was running like a dog. The service light came on (it was serviced by the dealer I had bought it from. I also had a three month warranty) as well. I drove directly to my local Holden dealer who put it on the tuner and said it needs no 5 injector replaced. Unusual, I thought. The dealer I bought it from did it under my warranty although, they say it was not covered under their warranty. Interesting to note, that the guy told me that his brother has an SSV of similar era and has had trouble with all of his injectors and was told that it is a common fault. Why do I get all the other recalls for this vehicle but not for this? I was told that as it was not a safety issue, Holden would not cover the faulty injectors. Well, I live in the bush. If I was caught up in a bushfire or health emergency, and this car ceased to function well enough to escape or get away, my life and that of any with me, would be at risk. I bought this car for the reliability, comfort and room of a sedan car. I travel long distances through station country, and feel that the top of the range should be well built and reliable. One other problem with the car is: it leaks dust badly. I was not to know until I put it on the dirt. Secondly, I did not do enough research to know that I cannot put a higher profile tyre on it. Other than that, I love driving it.
     
  17. Myfirstv8

    Myfirstv8 New Member

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    I had one injector replaced. It was done a few weeks ago, as in a couple. I also rang the Holden dealership that fixed it and asked about my 98 Octane issue. He said that some cars hate 98. It just does not resonate with the engine. I had only had access to 95 and had no troubles. It was on this particular trip in mention, that I filled with 98. The tech guy said to drive to my nearest fuel stop and fill with 91. WELL, my fuel consumption leaving town went from 19lph to between 6-8lph. After settling down in the system, it went back to around the 13.5 towing. The change is immediate. Yesterday on my 750k trip home, I filled with E10 and the fuel consumption was as good as the 95. I was told that the 98 put my car into limp/safe mode. Hence, the extremely high consumption. I am not a tech guru, but the plastic bit in the injector topic, relating to this issue was described to me when I questioned why Nos. 5 injector failed. I agree with others, that the injectors, if known to be faulty, should be a recall. If not, social media can do a lot of damage to their iconic brand.
     
  18. jono67

    jono67 Member

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    Mate, I'd ask your Holden dealer to check with head office to see about replacing the whole lot because you know of others (us, and the dealers brother) that have had the same issues and Holden have been doing just that. If they won't contact head office, call Holden Customer Care on 1800 46 465 336 (between 8.00am and 7.00pm Mon to Fri) and explain to them you've had an injector replaced and that you know other customers have had all injectors replaced due to faults with the original ones.
     
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  19. VS 5.0

    VS 5.0 Well-Known Member

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    A smaller diameter rim will allow a higher profile tyre and retain the same rolling diameter.
     
  20. Myfirstv8

    Myfirstv8 New Member

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    Interesting, I shall try again. The dealership said that Caprice rims are specifically designed for it. I looked in the owners manual and it said that it can only drive on the rims I had on it. A tyre dealership measured it up and searched all the specs and came up with the same. One tyre place said it would take the front ones off and try just to experiment. I visited four tyre places incl. the Holden dealership.
     

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