Missing elan plus 2
23 posts
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Before I rip its head off, any clues would be most welcome, I have a miss fire, changed the points, cap, plugs, rotor arm.leads, compression checked all 150+psi, checked the cams and have clearances, substituted the carbs. But still it persists. It might be a sticking valve? cannot think what else to do...the dizzy has no wear on the lobes or any wear that I can see
Holding the acc open at around three thousand rpm it cuts in and out but you cannot point to a particular cylinder as the culprit. Perhaps a dizzy change might be the quickest option, any one have a spare / idea. or can supply the model type?
cheers
Glen
Holding the acc open at around three thousand rpm it cuts in and out but you cannot point to a particular cylinder as the culprit. Perhaps a dizzy change might be the quickest option, any one have a spare / idea. or can supply the model type?
cheers
Glen
- stonks
- First Gear
- Posts: 20
- Joined: 26 Mar 2007
Might be the coil that's at fault. Try swopping that. I would put sticking valves lower down on the list.
Dave Chapman
Dave Chapman
- david.g.chapman
- Fourth Gear
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I would add a Condensor to that list.
Richard
Richard
Richard
'72 Sprint
'72 Sprint
- richardcox_lotus
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Did you check for any wobble in the distributor shaft? If you set the points at .015, and there's .015 of wobble, then the points will randomly not open.
Up and down movement of the shaft shouldn't be excessive, either.
Greg Z
'72 Sprint
Up and down movement of the shaft shouldn't be excessive, either.
Greg Z
'72 Sprint
Greg Z
45/0243K Sprint
45/7286 S3 SE DHC
45/0243K Sprint
45/7286 S3 SE DHC
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gjz30075 - Coveted Fifth Gear
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bad new plugs? Had bad new champions before now on more than one occasion.
Try NGK one hotter than the standard. worked for me...
Try NGK one hotter than the standard. worked for me...
- zeteclotus
- Second Gear
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- Joined: 07 Sep 2006
I have changed the plugs - again, removed the dizzy again, changed the rotor arm, condensor, and points again, the cap is new. The dizzy has no noticeable wear, either axially or vertically. all the lobes are regular and unworn, i have Refitted it and yes its marginally better. but its still not right, next stop will be to replace the points and condensor with a contactless unit and another new but non ballasted coil, I can then rule this area out full stop. BTW also removed the base plate and checked & lubed the weights - replaced the LT wires. New plug caps and the leads were replaced at one of my other earlier attempts. Also have replaced the carbs with some pre loved ones. better but not quite right. Thanks for all your ideas though.
- stonks
- First Gear
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- Joined: 26 Mar 2007
Have you tried looking at the timing with a strobe? It gives you a very good idea of whether or not the distributor and everything else is in good shape.
Even with a perfect distributor you can get an alarming amount of scatter in the timing as a result of poorly adjusted timing chain, worn skew gear, or excessive jack-shaft end-float. You may also see "missed" sparks synchronised with a stumble in the engine.
Paddy
Even with a perfect distributor you can get an alarming amount of scatter in the timing as a result of poorly adjusted timing chain, worn skew gear, or excessive jack-shaft end-float. You may also see "missed" sparks synchronised with a stumble in the engine.
Paddy
1963 Elan S1
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paddy - Coveted Fifth Gear
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How about the earthing strap between the engine and chassis? I was once asked to help a friend diagnose rough running. I was looking it over in the early evening and was amazed to see arcing at a bad engine earth connection. Replacing the earth strap solved the problem.
Russ Newton
Elan +2S (1971)
Elite S2 (1962)
Elan +2S (1971)
Elite S2 (1962)
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CBUEB1771 - Coveted Fifth Gear
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