rogerowen Posted August 21, 2019 Report Share Posted August 21, 2019 Having found metal filings in the distributor cap, I've decided to look further - not a pretty sight! looks like some balance weights have come adrift and made a bit of a mess, might explain the poor performance! I can't seem to get the cam off upwards to get everything out for a good clean, Have put the weights back on the pins where they should be - but notice a lot of up and down play on the cam 9 (abou 1.6mm) and wonder if there might be a washer missing, I have an old 25D from another car (not TR) and there's no play on that one. Currently looking for some dismantling instructions. Quote Link to post Share on other sites
RobH Posted August 21, 2019 Report Share Posted August 21, 2019 Looks like a case for the Distributor Doctor to me Roger. You might as well get it fixed properly with the right bits. Quote Link to post Share on other sites
ctc77965o Posted August 21, 2019 Report Share Posted August 21, 2019 Quote Link to post Share on other sites
rogerowen Posted August 21, 2019 Author Report Share Posted August 21, 2019 22 minutes ago, RobH said: Looks like a case for the Distributor Doctor to me Roger. You might as well get it fixed properly with the right bits. No, I'll give it a go - doesn't look to complicated........says he! Quote Link to post Share on other sites
RobH Posted August 21, 2019 Report Share Posted August 21, 2019 No it isn't complicated - but it's not usual for the advance weights to become dislodged so something must be amiss or badly worn. Are they the right weights and springs? You said in your other thread that the dizzy was partly dismantled when you got it. I wonder why? Quote Link to post Share on other sites
rogerowen Posted August 21, 2019 Author Report Share Posted August 21, 2019 33 minutes ago, RobH said: No it isn't complicated - but it's not usual for the advance weights to become dislodged so something must be amiss or badly worn. Are they the right weights and springs? You said in your other thread that the dizzy was partly dismantled when you got it. I wonder why? Probably wear, I have several from Morris Minors - they are all slightly different. Quote Link to post Share on other sites
ChrisR-4A Posted August 21, 2019 Report Share Posted August 21, 2019 The centrifugal advance is stamped on the weight carrier, just make sure you use one correct for your engine. If you do assemble it yourself I can recommend the spring kit sold by moss, you need slightly stiffer springs than standard to suit modern fuel. Chris Quote Link to post Share on other sites
rogerowen Posted August 21, 2019 Author Report Share Posted August 21, 2019 2 minutes ago, ChrisR-4A said: The centrifugal advance is stamped on the weight carrier, just make sure you use one correct for your engine. If you do assemble it yourself I can recommend the spring kit sold by moss, you need slightly stiffer springs than standard to suit modern fuel. Chris Yes, I see on this unit it is 10 (on the Morris Minor ones it is 16), springs on the TR one are each different one thicker than the other (someone else mentioned this). Anyway - it's had a good clean up and I'll see if it works OK this time. Quote Link to post Share on other sites
rogerowen Posted August 21, 2019 Author Report Share Posted August 21, 2019 All put back together and working, good rev range, steady tickover, smooth timing mark under strobe light. Just overrun at switch off - which might be a separate issue. Am pleased! Quote Link to post Share on other sites
rogerowen Posted August 21, 2019 Author Report Share Posted August 21, 2019 Good road test, slight hold back between 2500 - 3500, but now ignition better - will have another go with colortune tomorrow. Only problem was 1/2 mile from home and the throttle linkage jammed _FULL ON! Interesting, was nearly 50 years ago the same thing happened to me in one of my TR2's. Quote Link to post Share on other sites
ChrisR-4A Posted August 21, 2019 Report Share Posted August 21, 2019 Could be running weak from midrange try opening mixture screws 1 or 2 flats Chris Quote Link to post Share on other sites
rogerowen Posted August 21, 2019 Author Report Share Posted August 21, 2019 45 minutes ago, ChrisR-4A said: Could be running weak from midrange try opening mixture screws 1 or 2 flats Chris More than likely, colortune was struggling because ignition was a bit squiffy. Quote Link to post Share on other sites
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