Ernest Posted September 22, 2021 Report Share Posted September 22, 2021 Hi all Just a note to pass on recent experience with having new (I think reconditioned) injectors fitted. Out of 8 initially tried only 6 were any good. These were supplied by a company named HMI and the garage who fitted them for me said they did not know of any other suppliers. I thought that this information might be useful for others. Ernest Quote Link to post Share on other sites
Mk2 Chopper Posted September 22, 2021 Report Share Posted September 22, 2021 Did the garage sort the problem out from your previous post? Injectors are pretty simple things, unless the o rings have gone hard and are leaking, there isn't much that can go wrong. They can get stuck with debris, or need to be bled of air, but that's not the fault of the injector. A quick search will show a number of people and vendors that supply new or refurbished. I've bought a new one from KMI before and had no issues. Gareth Quote Link to post Share on other sites
Ernest Posted September 22, 2021 Author Report Share Posted September 22, 2021 Thank Gareth The garage is a well respected engine tuning company with quite a bit of racing success behind them. The car ran really well on the 20 odd mile drive home through London traffic. So far, so good. I was pleased that you had a different experience with HMI injectors. I was told that they had no problems with changing the duff ones. Ernest Quote Link to post Share on other sites
Mk2 Chopper Posted September 22, 2021 Report Share Posted September 22, 2021 That's good. If you get the issue again, do the pulse check on the injector lines, make sure the one you are holding isn't touching against another line and feel for a pulsing when it's idling, a steady pulsing means the injector on that line is working. Gareth Quote Link to post Share on other sites
Ernest Posted September 23, 2021 Author Report Share Posted September 23, 2021 Thanks Gareth This looks to be a useful do-it-yourself check, even for someone such as myself with poor mechanical knowledge Ernest Quote Link to post Share on other sites
john.r.davies Posted September 23, 2021 Report Share Posted September 23, 2021 A further check is to remove the injectors from the inlet manifold, and hang them in a large container while you turn over the engine. You want to see that thet they produce a fine spray, not a dribble of a distorted fan of fuel. A commercial coffee tin is a good size , or else construct a trough like this, with holes for the individual injectors, that you can suspend over the inlets and see each injector clearly: Quote Link to post Share on other sites
Mike C Posted September 23, 2021 Report Share Posted September 23, 2021 I use 6x560g Vegemite glass jars. They let me see the spray pattern while containing the petrol. Quote Link to post Share on other sites
Mk2 Chopper Posted September 23, 2021 Report Share Posted September 23, 2021 Steady lads, let's let Ernest build up his mechanical knowledge a little more first. It's part of the 'fun' with a classic, learning and working on them yourself, one step at a time, but soon you'll be pulling out injectors and bleeding them in no time Gareth Quote Link to post Share on other sites
john.r.davies Posted September 23, 2021 Report Share Posted September 23, 2021 Wow, Mike C, you have found a use for Vegemite! Quote Link to post Share on other sites
kiwican Posted September 23, 2021 Report Share Posted September 23, 2021 19 minutes ago, john.r.davies said: Wow, Mike C, you have found a use for Vegemite! What is more impressive is that they have been emptied. Most people would not go through 6 jars in a life time. Simon Quote Link to post Share on other sites
Mike C Posted September 23, 2021 Report Share Posted September 23, 2021 Quote Link to post Share on other sites
stuart Posted September 24, 2021 Report Share Posted September 24, 2021 14 hours ago, kiwican said: What is more impressive is that they have been emptied. Most people would not go through 6 jars in a life time. Simon I do, its always been my favourite for more than 40 yrs when I used to get Aussie guys on tour to bring it over in their flight cases as it wasnt available over here. Stuart. Quote Link to post Share on other sites
John McCormack Posted September 24, 2021 Report Share Posted September 24, 2021 1 hour ago, stuart said: I do, its always been my favourite for more than 40 yrs when I used to get Aussie guys on tour to bring it over in their flight cases as it wasnt available over here. Stuart. Vegemite is a critical food. The most important food group for Australians. On holiday in 2018 in Rome I got the craving, I must have Vegemite on toast for breakfast. I must. Google it. A shop a couple of kms away say they have it. My wife and I walk over and there it was, a very small jar of Vegemite. About $4 in Australia, about 2.4 euro. The sticker said 8 euro. Breakfast the next day was fantastic. Worth every euro! Quote Link to post Share on other sites
StuartG Posted September 26, 2021 Report Share Posted September 26, 2021 Surely it has to be Marmite ! Quote Link to post Share on other sites
CP26309 Posted September 29, 2021 Report Share Posted September 29, 2021 I use a Robinsons Jam Jar, with a hole in the lid! Quote Link to post Share on other sites
john.r.davies Posted September 29, 2021 Report Share Posted September 29, 2021 Strewth, mates, those Aussies must really like their Vegemite! So much, the jars are enormous! A Marmite jar is too small to get even one injector in it! Quote Link to post Share on other sites
Steves_TR6 Posted September 29, 2021 Report Share Posted September 29, 2021 Haha, Vegemite is nice but i’m a marmite man only this afternoon I did an injector test on a member’s tr6 and found 2 recalcitrant injectors, we used a small pyrex jar which worked well we’ll be ordering a set of refurbed injectors from Neil Ferguson, he’s served me and many others well for many years with PI parts. steve Quote Link to post Share on other sites
Martin50 Posted September 30, 2021 Report Share Posted September 30, 2021 I have seen the You Tube video for taking out injectors and testing / bleeding but I have never done this. It looks to be a risky activity with fine spray petrol around and then trying to get injectors back into the throttle body. Is there someone near me who is familiar with doing this who could help show me how to do it? I’m based near / in the New Forest area. I’m happy to travel a reasonable distance if needed (hopefully the garages are starting to have fuel now ). Also when I put the injectors in the throttle body, the fit was very tight. It was not just an easy push by hand. This was for all the injectors. I had new o rings and refurbished injectors, running with them for last year or so. But would like to feel confident to be able to check injectors and confirm all okay. I can bring marmite jar if needed . Appreciate any help. Quote Link to post Share on other sites
Mike C Posted September 30, 2021 Report Share Posted September 30, 2021 It's not that hard, this is what I do: Remove the plugs Enrichment leaver on full choke Tag injectors and remove Insert each injector into an empty 560gm Vegemite jar ( 6 required- might take a month to collect enough jars).Mount jars above rocker cover so injector lines slope upwards. Fit a remote starter push button to the starter solenoid Crank engine and observe each injector . Injectors should have a good , visible spray pattern . If you have no spray, a dribble or a bad pattern pull the injector tips and see if that clears it. When you are happy with the spray pattern reinsert injectors ( they should be a hand fit) and plugs, Do not fit the injector retaining plates at this stage. From memory I use a touch of rubber grease on the injector O rings during re installation. Start engine , you should feel a pulse on each injector line. When the engine is idling and running properly , reinstall holding plates. I used to do most of the above with the engine live and running and without the Vegemite jars until No.5 caught alight for some inexplicable reason ( the spray patterns are not near an external ignition source but still ignited) and the fire burned the nylon line before I could extinguish it. Anyway, if you're stuck it's not that hard. Quote Link to post Share on other sites
Martin50 Posted September 30, 2021 Report Share Posted September 30, 2021 Mike, Thank you for this. I like the steps / plan you outline. Taking the plugs out is very good idea in my mind and putting all 6 injectors in separate jars at same time also seems a very good idea. This is different to the YouTube clip I saw, but your experience with it catching fire was my worry but I can see this approach would be safer. I’ll still do it outside of garage and still keep a fire extinguisher close to hand but I do like approach here. I just now need 6 clear glass jars. Quote Link to post Share on other sites
john.r.davies Posted September 30, 2021 Report Share Posted September 30, 2021 Securely mounting six jars, Vegemite or not, on a running engine will require a substantial bracket. May I suggest the common trough that I showed above? This shows it, clamped to the plenum tube. Quote Link to post Share on other sites
Mike C Posted September 30, 2021 Report Share Posted September 30, 2021 Good idea, the sloping upwards of the injector lines will help clear air. I've found sometimes a large air pocket in an injector lines will "bounce" the injector pulses and stop the flow of petrol- that's when I have to make sure the line slopes upwards and pull the injector tips open while I crank out the air. Quote Link to post Share on other sites
CP26309 Posted October 1, 2021 Report Share Posted October 1, 2021 Much safer to test them one at a time in as I said using a Jam jar with the injector through a hole in the lid. Quote Link to post Share on other sites
Steves_TR6 Posted October 2, 2021 Report Share Posted October 2, 2021 15 hours ago, CP26309 said: Much safer to test them one at a time in as I said using a Jam jar with the injector through a hole in the lid. That’s what i do, on a running engine. first remove all the keeper plates and jiggle the injectors to make sure they are free to pull out start engine extract each injector in turn and point into jar, see if there is a cone of spray if no cone of spray then gently tap the injector and or very gently pull the spring loaded end of the injector with the injector pointing upwards to allow air to exit at this stage the injector either starts working in which case reinsert it , or it doesnt and needs replacing work your way along the 6 this process has either fixed the problem when the issue was just air in the system or identified the tired / failed injectors every time i’ve done it only take 20 minutes, and with a fire extinguisher at hand and ideally a second person to start/stop the engine is pretty safe steve Quote Link to post Share on other sites
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