Wayne Scott Posted August 19, 2019 Report Share Posted August 19, 2019 Posted on behalf of a member, Guy, who posted in rebuild blogs in error: Guy says; "My TR6 has recently had a new Fuel injector and overhauled fuel pump and fuel tank. Probably within last 18 months. recently the engine feels like it is either being starved of fuel and/or an electrical issue, as the engine is no longer smooth sounding when accelorating, and instead is juddering and less power. Any pointers ? It did this before when I ran the fuel tank quite low. This time fuel tank was a quarter full. I would assume due to overhauled fuel tank that it would not have years of bits in." Quote Link to post Share on other sites
ntc Posted August 19, 2019 Report Share Posted August 19, 2019 Wayne Need more info,do we not have a tech team on the home site anymore? Quote Link to post Share on other sites
Mk2 Chopper Posted August 19, 2019 Report Share Posted August 19, 2019 Good cone spray from all injectors? fuel pressure correct? Spark plug condition? Coil? Points? Timing? Fuel age? Plenty of things to check. Gareth Quote Link to post Share on other sites
Stagpowered Posted August 19, 2019 Report Share Posted August 19, 2019 Sounds more like an ignition problem to me, weak sparks blow out under acceleration. Neil Quote Link to post Share on other sites
Mike C Posted August 19, 2019 Report Share Posted August 19, 2019 Does the missing not occur when the tank is full? Quote Link to post Share on other sites
rcreweread Posted August 19, 2019 Report Share Posted August 19, 2019 Hi - when Wayne says " overhauled fuel pump and tank", what was done to the tank ? Was it new , treated with slosh tank sealant or similar - you might be getting debris in your fuel lines/tank outlet if it wasn't new Cheers Rich Quote Link to post Share on other sites
Mike C Posted August 19, 2019 Report Share Posted August 19, 2019 If I installed a new tank and fuel system I would expect the filter to be blocked early just due to debris in the new components. Easy to change and see if things improve. Quote Link to post Share on other sites
astontr6 Posted August 21, 2019 Report Share Posted August 21, 2019 On 8/19/2019 at 8:02 PM, Mk2 Chopper said: Good cone spray from all injectors? fuel pressure correct? Spark plug condition? Coil? Points? Timing? Fuel age? Plenty of things to check. Gareth +1 and were the injectors bled properly? as there might still be air still in the injector pipes a very common problem after pulling the PI system a part and refitting! Check that pulses can be felt in all injector lines first? Bruce Quote Link to post Share on other sites
GUY BENNETT Posted August 22, 2019 Report Share Posted August 22, 2019 Mine used to miss fire at higher revs. Cured by new spark plugs. 1 was breaking down. Could be leads, cap, rotor etc. Quote Link to post Share on other sites
Misfit Posted August 26, 2019 Report Share Posted August 26, 2019 I was followed by a friend, apparently there is a terrible smell of fuel, car when starts takes a couple of minutes to fire on all cylinders from cold, but always has. Lately it has taken a little longer. But runs well when warm but still smells. I noted that 4,5,6 plugs are a little sooted up when checked. But as I said when warm fine so far, any suggestions? Quote Link to post Share on other sites
John L Posted August 26, 2019 Report Share Posted August 26, 2019 (edited) Unbalanced throttle bodies, or injectors not spraying properly. Have you checked if the MU holds vacuum or it will run rich. Could also be the nylon bearing on the throttle shaft not being there, so not opening the rear butterfly as much. Heat usually destroys them. If you take off the black cap on the MU, mark where its orientation, unlock the large ring, and turn the whole lot anticlockwise 1/4 of a turn, and tighten the lock nut again, and refit the black cap, I'm sure it will run better, if not put back to where you started. This will weaken the mixture thru the whole range. John Edited August 26, 2019 by John L Quote Link to post Share on other sites
Waldi Posted August 26, 2019 Report Share Posted August 26, 2019 Hi Derek, following John’s remark about the original (white) nylon throttle linkage bearings, those are relatively easy to check and replace by PU (blue) bearings, Moss and others sell these. It requires removal of air plenum and linkage, and off course adjusting the linkage and balancing the 3 TB’s during re-installation. While you are at it (if you will have a go), I would also replace the original 3 vertical linkages to each TB by the ball version most suppliers also can provide you with. It makes balancing easier. To avoid unnecessary work, I would do the simple (cheaper) things first: check balancing of TB’s, spark plugs, valve gaps, compression ratio. The rear cylinders are know to run a bit more rich anyway. And there are no classic cars that don’t “ stink” compared to moderns, unless you love them:). Regards, Waldi Quote Link to post Share on other sites
Misfit Posted August 27, 2019 Report Share Posted August 27, 2019 JohnL & Waldi Thank you for your quick response, l will let you know the outcome. cheers Derek Quote Link to post Share on other sites
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