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  Very poor running Elan
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   Author  Topic: Very poor running Elan  (Read 690 times)
Bomba-doo
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Very poor running Elan
« on: December 16, 2016, 05:27:44 AM »
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I have an old elan, I think '75? It has electric start. Anyway, it runs very poorly. If I had to describe it, its sounds a lot like timing is way off. (Sounds like it firing every second time or something) I took side off expecting to see timing plate/stator had moved. It had not, and looks to be correct with timing marks.
Other than timing, any other possible issues it could be? I have the motor out and on bench would just like to look at anything it could be while its out. I am planning on putting in new condenser as well.
Thanks
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cdem72
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Re:Very poor running Elan
« Reply #1 on: December 22, 2016, 07:54:57 AM »
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Did you check the carb settings? If they are too rich, it will run like a dog.
« Last Edit: December 22, 2016, 11:43:54 PM by cdem72 » Report to moderator Logged

'62 tincab; '69 399 T'NT; '70 292, 340 bliz, 340 T'NT; '71 246, 291 bliz, 440, 640, 775 T'NT; '72 293, 340, 440 bliz; '73 345 bliz, '74 440 T'NT, '75 245 rv
Bomba-doo
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Re:Very poor running Elan
« Reply #2 on: January 5, 2017, 07:17:00 PM »
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Well I decided to take the motor out and look inside. It only has 90lbs compression so certainly could use a looking at. Putting in new condenser too. The piston looked "sloppy" in the cylinder? It's an Elko with 68 74 (going on memory with the 4). Looking at another motor I had laying around it has a 69 43 (once again not sure of the last digit). But the larger piston fits much nicer in both cylinders. But is it too big? How much does it expand with heat? I believe the bore is 69, so putting in a piston that seems larger just don't seem right? I'll get a caliper at work and measure the cylinder just to be sure, but looking for opinions on what I have going on.
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Re:Very poor running Elan
« Reply #3 on: January 9, 2017, 04:06:26 PM »
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"May" have found my problem with the engine running so rough. Broken wire. Well, almost broken wire. While hooking up meter to check timing, and putting one lead on the black wire in the connection block that connects to the chassis wiring, the continuity was all over the place. Bend the wire slightly and it was fine, let it go and it wasn't. I guess when hooked up and running the spark was very intermittent. Explains too, maybe, why it got slowly worse and worse as the connection got worse. At least I hope. Find out when its all back together.
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Bomba-doo
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Re:Very poor running Elan
« Reply #4 on: January 18, 2017, 07:01:01 PM »
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Well got the engine all back together, and seems to be running fine. I do not know the exact cause for the very poor running condition for sure. I fixed the bad wire, changed piston and rings, installed new capacitor, new gaskets, cleaned points and adjusted the timing (advanced lever),  and changed plug wire. Compression went from 90 to 120lbs. Haven't had it out yet, but its running smoothly in the garage.
Hope this is it. We have snow now and young fella wants it running almost as much as i do.
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Bomba-doo
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Re:Very poor running Elan
« Reply #5 on: February 16, 2017, 06:57:41 PM »
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My problem is still here. After doing all the things i mentioned earlier, the motor ran great for about three days and a hundred trips around the house. It worked flawlessly, then all the sudden it lost power, back firing and missing again. At one point i even seen a spark coming out of the cooling vent (the plastic part that fits over the top of the motor) so that isnt good. So I am wondering now if a gasket went on the head, or even where the cylinder attaches to the base, how would the motor react? I did manage to get it running about half throttle and above and sounded good at that speed, but not below. I considered water in the gas, but it ran perfect for about three days. If it means any thing, the spark plug has a nice tan color to it.
Any thoughts or help greatly appreciated.
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EricR
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Re:Very poor running Elan
« Reply #6 on: February 16, 2017, 07:03:44 PM »
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Something has come apart- at least need to pull the fan shroud and look.
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Re:Very poor running Elan
« Reply #7 on: February 20, 2017, 05:02:35 PM »
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Can somebody tell me how the motor would react if the condenser was malfunctioning? I am suspicious about this part because the first time i looked over the motor i replaced the condenser with one i ordered online. I bought two at the time. The motor ran great for a little while, then started misfiring badly. I replaced a number of parts, (plug, plug wire, coil, new piston and rings)and the condenser again. Three days of running wonderful, and \i have the exact same problem. I am pretty sure it is misfiring.
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Re:Very poor running Elan
« Reply #8 on: February 20, 2017, 07:52:57 PM »
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Very well could be condenser again. Often the after market condensers doo not fit very tight in the stator plate, poorly enough that they don`t make good connection. I know time consuming but you might try to stake the condenser in the plate ( lightly center punch the plate in several places around the condenser).
Bones
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