Paul H Posted April 26, 2019 Report Share Posted April 26, 2019 Hi my Vitesse Mk2 has an annoying issue. acceleration is fine easy up to 4K if I want . Now cruising at 50 ish the engine becomes hesitant and “unhappy” . My uneducated guess is to retard timing. Any ideas welcomed Paul Link to comment Share on other sites More sharing options...
johny Posted April 26, 2019 Report Share Posted April 26, 2019 could be mixture a shade weak and as the weather warms up it gets worse and shows as engine hesitation at constant speed while acceleration is ok due to the mixture being enrichened then..... Link to comment Share on other sites More sharing options...
johny Posted April 26, 2019 Report Share Posted April 26, 2019 you might be able to confirm this by pulling the choke out a little while driving to see if the richer mixture that gives helps.... 1 Link to comment Share on other sites More sharing options...
Pete Lewis Posted April 26, 2019 Report Share Posted April 26, 2019 i echo that sounds a tad lean stick to engine oil in the dashpots over advance can make it a bit pecky . , but if its been ok for ages dont change anything do check the points gap has not closed up small holes in diaphragms do develop over many thous miles that as a last idea. if the diphragm has swelled a wash in petrol returns it to new size . Pete Pete 1 Link to comment Share on other sites More sharing options...
Paul H Posted April 26, 2019 Author Report Share Posted April 26, 2019 Thanks Pete and Johny . I’ll richen the mixture by half a turn and report back next week. The current setup is new Delco with Accuspark , Huco pull fuel pump . I know the issues with the reliability of Accuspark so looking to have my Lucas 22d reconditioned with traditional points . Is this a DIY or it best to send away to a professional . One point is that the Delco seems to rev more freely with much higher range . Maybe it’s just me and my foot was more firm Paul Link to comment Share on other sites More sharing options...
johny Posted April 26, 2019 Report Share Posted April 26, 2019 why not try testing your mixture with the plunger on the side of each Stromberg. With the engine up to temperature I lift one with a finger and then release it after a second while listening to the engine response which shouldnt change. If the revs rise - too rich and fall - weak however its the immediate response your interested in as if you hold the plunger up too long the revs always tend to drop off. Always thought the Lucas was supposed to be the better dizzy but maybe thats just down to its build quality.... Link to comment Share on other sites More sharing options...
Pete Lewis Posted April 27, 2019 Report Share Posted April 27, 2019 Odd problems with accuspark are begining to appear , im forming a view they are best avoided just based on the ramblings and Cars that arrive with misfires, I guess many are fine. Both delco and lucas do a good job both need an odd oil down inside to lube the spindle bushes , delco are notorious for running dry and wearing the shaft you can rebuild lucas but delco can be a mend to destruction Pete Link to comment Share on other sites More sharing options...
AidanT Posted April 27, 2019 Report Share Posted April 27, 2019 Ditto that Pete Aidan Link to comment Share on other sites More sharing options...
Badwolf Posted April 27, 2019 Report Share Posted April 27, 2019 Amazingly, my antique electronic ignition is still working. It can be returned to 'normal' at the flick of a switch and can also be used as an imobiliser. Its a Sparkrite SX1000 system. That's the kiss of death for it now! Link to comment Share on other sites More sharing options...
NonMember Posted April 27, 2019 Report Share Posted April 27, 2019 My GT6 had a Sparkrite on it when my brother bought it. Had a switch to return to "normal" because it relied on the points anyway. I think I took it off because it gave problems but in any case, I fitted Lumenition because it's a worn Delco disi which was giving forty degrees of scatter as the shaft rattled around. The Lumenition optical thing isn't sensitive to that so it runs much nicer now. And that Lumenition unit has been on there twenty years and only given trouble once, when someone unplugged it and didn't push the connector back on fully. Link to comment Share on other sites More sharing options...
Badwolf Posted April 27, 2019 Report Share Posted April 27, 2019 Thats the one. I don't think I have changed my points since the restoration 30 years ago. I think the points only take a low 'trigger' current when the unit is set to electronic. Must look out the instructions. Link to comment Share on other sites More sharing options...
Nick Jones Posted April 27, 2019 Report Share Posted April 27, 2019 On 26/04/2019 at 10:33, Paul H said: Now cruising at 50 ish the engine becomes hesitant and “unhappy” It's called "lean hitching". Richen it up a touch - Johnny's choke suggestion is a good check. Nick 1 Link to comment Share on other sites More sharing options...
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