Scaf Posted October 11, 2021 Report Share Posted October 11, 2021 I have been searching for threads on upgrading the fuel injection on my PI. Everyone I meet has assumed that it would have been upgraded but it’s still on the Lucas pump. I have a cold start problem that could easily injector or pump related so am considering an upgrade but don’t really know where to start. Any advise / thoughts or links to decent threads on the subject as well as supplier and fit recommendations most welcome and appreciated. Thanks Sam Quote Link to post Share on other sites
RogerH Posted October 11, 2021 Report Share Posted October 11, 2021 Hi Sam, where about's are you.? Roger Quote Link to post Share on other sites
Scaf Posted October 11, 2021 Author Report Share Posted October 11, 2021 (edited) Sorry I should have said. Hemel Hempstead, Hertfordshire. Happy to travel within reason Edited October 11, 2021 by Scaf Quote Link to post Share on other sites
StuartG Posted October 11, 2021 Report Share Posted October 11, 2021 Have you checked that the enrichment lever on the MU is working fully when the "choke" is full pulled ? Quote Link to post Share on other sites
ntc Posted October 11, 2021 Report Share Posted October 11, 2021 1 hour ago, Scaf said: I have been searching for threads on upgrading the fuel injection on my PI. Everyone I meet has assumed that it would have been upgraded but it’s still on the Lucas pump. I have a cold start problem that could easily injector or pump related so am considering an upgrade but don’t really know where to start. Any advise / thoughts or links to decent threads on the subject as well as supplier and fit recommendations most welcome and appreciated. Thanks Sam Nothing wrong with the Lucas pump, how long do you let it run before starting and when was the last time you serviced it filter etc? Quote Link to post Share on other sites
Scaf Posted October 11, 2021 Author Report Share Posted October 11, 2021 1 minute ago, ntc said: Nothing wrong with the Lucas pump, how long do you let it run before starting and when was the last time you serviced it filter etc? 30 seconds or so. I have only just acquired the car so have no evidence of the servicing of the PI system. Something for me to look into Quote Link to post Share on other sites
Scaf Posted October 11, 2021 Author Report Share Posted October 11, 2021 12 minutes ago, StuartG said: Have you checked that the enrichment lever on the MU is working fully when the "choke" is full pulled ? Yes, just had the choke sorted as it was not operating correctly- definitely made a difference but it’s still not “turn key” Quote Link to post Share on other sites
Mike C Posted October 11, 2021 Report Share Posted October 11, 2021 If I leave the car for a while, I have to make sure the injection system is full of fuel- wait 10 secs or so until the Bosch pump changes note. Then I crank the engine over. Quote Link to post Share on other sites
Scaf Posted October 12, 2021 Author Report Share Posted October 12, 2021 Interesting - I will have to try various “starting” techniques including giving the pump time to build up pressure. thanks Quote Link to post Share on other sites
michaelfinnis Posted October 12, 2021 Report Share Posted October 12, 2021 8 hours ago, Mike C said: If I leave the car for a while, I have to make sure the injection system is full of fuel- wait 10 secs or so until the Bosch pump changes note. Then I crank the engine over. Agree with Mike, I do the same. A starting problem is unlikely to be the pump if the car runs ok once started. More likely is the injectors, if they are not sealing off when the engine is stopped then fuel will dribble out emptying the injector hoses. Pull out the injector after turning off the engine and see if fuel is dribbling out. Check the fuel spray pattern into a jam jar as well. The injection system doesn't need upgrading, it just needs to be in good working order. All assuming the ignition system is good of course. Mike. Quote Link to post Share on other sites
chrismitchell Posted October 12, 2021 Report Share Posted October 12, 2021 5 hours ago, michaelfinnis said: Agree with Mike, I do the same. A starting problem is unlikely to be the pump if the car runs ok once started. More likely is the injectors, if they are not sealing off when the engine is stopped then fuel will dribble out emptying the injector hoses. Pull out the injector after turning off the engine and see if fuel is dribbling out. Check the fuel spray pattern into a jam jar as well. The injection system doesn't need upgrading, it just needs to be in good working order. All assuming the ignition system is good of course. Mike. I agree with both. Jamjar is safest but I admit to holding them upside down in open air to check spray, should be a nice cone shape. If they are old type with a point on the end you can often persuade them to work properly by wiggling the point. If no point try tapping with a spanner etc. Always wear safety goggles. The plugs must be in decent condition, not wet or oily black looking. Quote Link to post Share on other sites
Scaf Posted October 12, 2021 Author Report Share Posted October 12, 2021 Great stuff, a few thing to try and reassuring that I don’t need to upgrade. plugs and ignition are in good order and car runs fine so will take a look at the injectors. Quote Link to post Share on other sites
chrismitchell Posted October 12, 2021 Report Share Posted October 12, 2021 In that case I'm having slight 2nd thoughts. If you intend using the car for long trips in boiling hot weather the Lucas pump may irritate, due to vapour locks. Not so much the cars fault, more modern fuels. Thus perhaps not spend too much time/money messing with it. I gave up and swopped to Bosch over 20 years ago, no regrets. Quote Link to post Share on other sites
jerrytr5 Posted October 12, 2021 Report Share Posted October 12, 2021 18 hours ago, Scaf said: Sorry I should have said. Hemel Hempstead, Hertfordshire. Happy to travel within reason Come and chat with your local group (North London) this Thursday at The Red Lion, Hemel Hempstead, HP3 9TD Jerry Quote Link to post Share on other sites
aardvark Posted October 12, 2021 Report Share Posted October 12, 2021 What cold start problems are you having? You refer to it not being ‘turn key’. These cars need a bit of key turning. Are you expecting it to start straight away or are you struggling to get it to start after a lot of turning over? cheers dave Quote Link to post Share on other sites
Scaf Posted October 12, 2021 Author Report Share Posted October 12, 2021 I have had lots of classics, the latest has a 65 Mustang fitted with quad 48ida webers, two pumps of the throttle and she came to life with no choke. I am bringing to realise that the TR6 is a different animal in that regard. I have to turn her over for what feels like far too long, two or three times before she comes to life then let her idle a while before attempting to drive. If this is normal then I will get used to not, but it doesn’t feel right, basically if feels like it won’t start then does, just about. Quote Link to post Share on other sites
Scaf Posted October 12, 2021 Author Report Share Posted October 12, 2021 3 hours ago, jerrytr5 said: Come and chat with your local group (North London) this Thursday at The Red Lion, Hemel Hempstead, HP3 9TD Jerry Jerry, Harry has been in touch as well, so t think I can make this week as it’s my wife’s birthday. what time do you meet and how often? Quote Link to post Share on other sites
Macleesh Posted October 12, 2021 Report Share Posted October 12, 2021 44 minutes ago, Scaf said: I have had lots of classics, the latest has a 65 Mustang fitted with quad 48ida webers, two pumps of the throttle and she came to life with no choke. I am bringing to realise that the TR6 is a different animal in that regard. I have to turn her over for what feels like far too long, two or three times before she comes to life then let her idle a while before attempting to drive. If this is normal then I will get used to not, but it doesn’t feel right, basically if feels like it won’t start then does, just about. Mine needs quite a lot of cranking if left for a while (weeks) That's even after leaving the pump to run for a generous period. However use it daily an it's pretty much "on the button" Quote Link to post Share on other sites
aardvark Posted October 12, 2021 Report Share Posted October 12, 2021 44 minutes ago, Scaf said: I have had lots of classics, the latest has a 65 Mustang fitted with quad 48ida webers, two pumps of the throttle and she came to life with no choke. I am bringing to realise that the TR6 is a different animal in that regard. I have to turn her over for what feels like far too long, two or three times before she comes to life then let her idle a while before attempting to drive. If this is normal then I will get used to not, but it doesn’t feel right, basically if feels like it won’t start then does, just about. Two or three cranks of the starter sounds about right it you are using the car intermittently. If you use the car daily then I find it’s one or two cranks. Don’t expect these cars to start up like a carb car. Quote Link to post Share on other sites
jerrytr5 Posted October 12, 2021 Report Share Posted October 12, 2021 3 hours ago, Scaf said: Jerry, Harry has been in touch as well, so t think I can make this week as it’s my wife’s birthday. what time do you meet and how often? All here https://www.tr-register.co.uk/group/north-london Quote Link to post Share on other sites
Scaf Posted October 12, 2021 Author Report Share Posted October 12, 2021 4 minutes ago, jerrytr5 said: All here https://www.tr-register.co.uk/group/north-london Thanks for the link - I signed up to the register this evening and selected North London. Good job I checked or I would have headed to the the wrong Red Lion. I can’t see a time listed though Quote Link to post Share on other sites
Scaf Posted October 12, 2021 Author Report Share Posted October 12, 2021 Been looking on YouTube etc about the injectors so may pull them at the weekend to check and bleed. Not found anything to show how to clean them, only replacement but will see how they look and perform and go from there. Help and advice so far much appreciated sam Quote Link to post Share on other sites
ntc Posted October 12, 2021 Report Share Posted October 12, 2021 13 minutes ago, Scaf said: Been looking on YouTube etc about the injectors so may pull them at the weekend to check and bleed. Not found anything to show how to clean them, only replacement but will see how they look and perform and go from there. Help and advice so far much appreciated sam Don’t you would be better off talking with Jerry he will give you sound advice Quote Link to post Share on other sites
Scaf Posted October 12, 2021 Author Report Share Posted October 12, 2021 And your advice sounds “sound” , I hope to get to the meet on Thursday if only for a short while. Quote Link to post Share on other sites
ntc Posted October 12, 2021 Report Share Posted October 12, 2021 11 minutes ago, Scaf said: And your advice sounds “sound” , I hope to get to the meet on Thursday if only for a short while. It is , just too help how old is the battery? It may crank but reduce power when needed ie cold Quote Link to post Share on other sites
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