Pedro P. de Lima Posted May 23, 2007 Report Share Posted May 23, 2007 (edited) Hi everybody! My name is Pedro, I live in Azores Island (Terceira), Portugal, and I´m a proud owner of a TR6 PI. A few days ago I replace the fuel pump that was losing gas and at the same time the starter motor. The motor starts but after 5 minutes stops and don´t start again. Next day, the same: sometimes starts and after 5-10 minutes stops.. a few hours later, the same thing. The gas arrives to the pump injection, but don´t arrives to the injectors, sometimes the engine works, sometimes not! What could be the problem? The TR6 never had any problem! Thanks for any help! Edited May 23, 2007 by Pedro P. de Lima Quote Link to post Share on other sites
marvmul Posted May 23, 2007 Report Share Posted May 23, 2007 One of the many possibilities can be a bad electrical connection. Bad connection = high electrical resistance = temperature at the connection is rising/lower performance and pressure. In the end, the pump can get hot with vapour lock as a result. Quote Link to post Share on other sites
JohnC Posted May 23, 2007 Report Share Posted May 23, 2007 Another random suggestion - you may have a dirty fuel filter or clogged filter intake. The car will run on what's in the filter bowl, but then starve. Wait a while for more fuel to seep through/past the obstruction, and the car will start again, and again run for a few minutes before stopping. Been there, done that. Easy and cheap to test & fix too. Cheers, John Quote Link to post Share on other sites
Pedro P. de Lima Posted May 24, 2007 Author Report Share Posted May 24, 2007 Thanks everybody! I´ll try and report the forum. Quote Link to post Share on other sites
bonjovi Posted May 24, 2007 Report Share Posted May 24, 2007 one assumes the injection is bled properly especialy the six pipes to the injectors? Does it run on all six for the five to ten minutes? You could also make sure the return pipe from the meetering unit is not restricted.which may cause a pressure build up. hope this may help good luck Quote Link to post Share on other sites
Pedro P. de Lima Posted May 24, 2007 Author Report Share Posted May 24, 2007 (edited) Apparently no electrical problems, but still the same: it starts, run well, after + or - 5 min stops!! Perhaps the pump fuel is not good, but it was, only lose some gas, I replace for another used, but the problem remains!! Any help?? Edited May 24, 2007 by Pedro P. de Lima Quote Link to post Share on other sites
raydrink Posted May 24, 2007 Report Share Posted May 24, 2007 Hi Pedro, I'm a little confused by your description of the fault. Are you saying that it ran OK with the old pump, apart from 'lose some gas'? What does 'lose some gas' mean? Ray Quote Link to post Share on other sites
Pedro P. de Lima Posted May 24, 2007 Author Report Share Posted May 24, 2007 Hi Pedro, I'm a little confused by your description of the fault. Are you saying that it ran OK with the old pump, apart from 'lose some gas'? What does 'lose some gas' mean? Ray Hi Ray, sorry for my explanation, a few petrol went out of the pump due to wear o´ring, I thinK. It ran ok until I change the pump, but now don´t run ok either the old either the new used pump. Quote Link to post Share on other sites
Richard Crawley Posted May 24, 2007 Report Share Posted May 24, 2007 Hi Pedro No criticism & I understand the language may be a bit difficult for you but when reading you posts, I don't really understand what you r problem is!! You’ve changed pumps (for what?) starter motors (doesn’t really matter), fuel why?! Try & be a bit more specific, keep it simple & I’m sure we can help! Quote Link to post Share on other sites
Pedro P. de Lima Posted May 25, 2007 Author Report Share Posted May 25, 2007 Hi PedroNo criticism & I understand the language may be a bit difficult for you but when reading you posts, I don't really understand what you r problem is!! You’ve changed pumps (for what?) starter motors (doesn’t really matter), fuel why?! Try & be a bit more specific, keep it simple & I’m sure we can help! I´ve changed fuel pump for another one used because losing fuel, but the old one was running well. After the change, the 2 pumps only run about 5 minutes, then stop. Quote Link to post Share on other sites
jonlar Posted May 25, 2007 Report Share Posted May 25, 2007 Hi Pedro, is your car fitted with the "Inertia Switch" on the bulkhead, if so take it apart, thoroughly clean, check for overheating damage/melting. These tend to get corroded/dirty, go high resistance and cook themselves, which why I and others recommend a 12V +ve being taken to the boot and using the original wiring to switch a relay. Try a search in the archives. Quote Link to post Share on other sites
Pedro P. de Lima Posted May 25, 2007 Author Report Share Posted May 25, 2007 Hi Pedro, is your car fitted with the "Inertia Switch" on the bulkhead, if so take it apart, thoroughly clean, check for overheating damage/melting. These tend to get corroded/dirty, go high resistance and cook themselves, which why I and others recommend a 12V +ve being taken to the boot and using the original wiring to switch a relay. Try a search in the archives. All ok, the problem remains..I think perhaps the 2 fuel pumps are not good. Quote Link to post Share on other sites
david ferry Posted May 25, 2007 Report Share Posted May 25, 2007 (edited) Pedro, I would remove the feed pipe to the pump, after the filter, and ensure that there is a good flow of fuel from the pipe. Ensure that a good amount comes out, without the flow reducing. This will mean that there can be no obstruction to fuel supply. Many years ago, I had this problem and it turned out to be sludge build up in the outlet pipe from the bottom of the tank. If you have difficulties with language, you could try contacting 'ctrofa' on this forum. He is in Porto and may be able to help. His English is excellent. He also knows a lot about TRs. Good luck. David Edited May 25, 2007 by david ferry Quote Link to post Share on other sites
Pedro P. de Lima Posted May 25, 2007 Author Report Share Posted May 25, 2007 Pedro, I would remove the feed pipe to the pump, after the filter, and ensure that there is a good flow of fuel from the pipe. Ensure that a good amount comes out, without the flow reducing. This will mean that there can be no obstruction to fuel supply. Many years ago, I had this problem and it turned out to be sludge build up in the outlet pipe from the bottom of the tank. If you have difficulties with language, you could try contacting 'ctrofa' on this forum. He is in Porto and may be able to help. His English is excellent. He also knows a lot about TRs. Good luck. David Hi David, already contacted 'ctrofa', a real specialist in TRs! It seems the problem is the fuel pump. Quote Link to post Share on other sites
Maregratia Posted May 25, 2007 Report Share Posted May 25, 2007 Hi Pedro I had a similar problem with mine after a reabuild. Everyting on the fuel side had been replaced with reconditioned parts during the reabuild. Engine was getting starved of fuel after five to ten min. It ended up the problem was the rubber vent seel on the filler cap had gone hard, ran the car with cap open slightly no problem replaced the seel and now runs well. John TR6PI Quote Link to post Share on other sites
Pedro P. de Lima Posted May 25, 2007 Author Report Share Posted May 25, 2007 Hi Pedro I had a similar problem with mine after a reabuild. Everyting on the fuel side had been replaced with reconditioned parts during the reabuild. Engine was getting starved of fuel after five to ten min. It ended up the problem was the rubber vent seel on the filler cap had gone hard, ran the car with cap open slightly no problem replaced the seel and now runs well. John TR6PI Thanks John, already tried, problem remains.. Quote Link to post Share on other sites
dave-lewis Posted May 26, 2007 Report Share Posted May 26, 2007 Hi Pedro, Just a wild guess. Try waggling (a technical term!) the brown lucar connector on the fuse box. I had a problem where the engine wouldn't fire and when I took the brown wire off and reconnected it it started straight away. Regards, Quote Link to post Share on other sites
jonlar Posted May 26, 2007 Report Share Posted May 26, 2007 Hi Pedro, have you tried swapping the ignition coil, and condenser in dizzy? Quote Link to post Share on other sites
Pedro P. de Lima Posted May 27, 2007 Author Report Share Posted May 27, 2007 Thanks everybody, I´ll try and report the forum Quote Link to post Share on other sites
jean Posted May 27, 2007 Report Share Posted May 27, 2007 (edited) The best is to start investigating at the beginning, from tank outlet to PRV. As soon as the engine stops check if there is fuel in the filter bowl and listen to the sound of the pump, high pitch sound points to fuel starvation. Did you disconnect any other pipes, my 6 had plenty of them between PRV filter and tank. Strange enough this pipes are not shown in any manual, are they only fitted to CKD cars. The tank return from the PRV was connected via a T piece to the filter bowl and strangely the openings on the T piece were of different diameter. A friend of mine was confronted with a same problem as you and it took a considerable time to find out what was wrong. As he used to add Redex to the fuel, at a certain moment the cap seal dropped into the tank and was floating around until meeting the tank outlet. This was followed by an immediate engine shut down. Only after the so created vaccum in the pipes had faded, the engine would restart. Edited May 28, 2007 by jean Quote Link to post Share on other sites
Pedro P. de Lima Posted May 28, 2007 Author Report Share Posted May 28, 2007 The best is to start investigating at the beginning, from tank outlet to PRV. As soon as the engine stops check if there is fuel in the filter bowl and listen to the sound of the pump, high pitch sound points to fuel starvation. Did you disconnect any other pipes, my 6 had plenty of them between PRV filter and tank. Strange enough this pipes are not shown in any manual, are they only fitted to CKD cars. The tank return from the PRV was connected via a T piece to the filter bowl and strangely the openings on the T piece were of different diameter.A friend of mine was confronted with a same problem as you and it took a considerable time to find out what was wrong. As he used to add Redex to the fuel, at a certain moment the cap seal dropped into the tank and was floating around until meeting the tank outlet. This was followed by an immediate engine shut down. Only after the so created vaccum in the pipes had faded, the engine would restart. Thanks Jean, all verified, the problem remains...waitig for a new pump.. Quote Link to post Share on other sites
Pedro P. de Lima Posted June 1, 2007 Author Report Share Posted June 1, 2007 All ok...with a new Bosch pump! Quote Link to post Share on other sites
jonlar Posted June 1, 2007 Report Share Posted June 1, 2007 Well done Pedro, persistence prevails! Quote Link to post Share on other sites
Chris Cunnington Posted June 5, 2007 Report Share Posted June 5, 2007 I have recieved an email from Pedro P de Lima concerning his "mistery" All is now well - fitting a new Bosch pump has solved all the problems! Many thanks for all the help offered. Chris Cunnington General Manager TR Register Quote Link to post Share on other sites
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