No spark
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Hi,
I have no spark in plugs. This after changing to a new starter (now works excellent), and refurbishing my tacho (haven't got any rpms yet so I can't see if it works).
I have measured voltage at the coil poles, and they are 11,5V on positive and 1,0V on the other.
I have a pertronix electric ignition. Plug cables/plugs are ok.
Why is this? Could it be a short circuit in the tacho, or is it the distributor?
/Ulf
I have no spark in plugs. This after changing to a new starter (now works excellent), and refurbishing my tacho (haven't got any rpms yet so I can't see if it works).
I have measured voltage at the coil poles, and they are 11,5V on positive and 1,0V on the other.
I have a pertronix electric ignition. Plug cables/plugs are ok.
Why is this? Could it be a short circuit in the tacho, or is it the distributor?
/Ulf
1974 Lotus Elan +2 130/5
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Hi,
as a partial reply to your post, RVI tachos have the ignition low voltage signal through them, so there is a possibility of a short which would translate in no spark... I believe there are a couple variations of RVI tachos, bottom line being that a white wires in the lotus dash loom would do a loop around a piece of soft metal that would convey the coil input current inside as a sensor. So in case you have these 2 white wires make sure both are connected to the tacho, or if you want the tacho out for test purposes have the 2 white wires connected to each other.
as a partial reply to your post, RVI tachos have the ignition low voltage signal through them, so there is a possibility of a short which would translate in no spark... I believe there are a couple variations of RVI tachos, bottom line being that a white wires in the lotus dash loom would do a loop around a piece of soft metal that would convey the coil input current inside as a sensor. So in case you have these 2 white wires make sure both are connected to the tacho, or if you want the tacho out for test purposes have the 2 white wires connected to each other.
S4SE 36/8198
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nmauduit - Coveted Fifth Gear
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Ulf
11.5V on one side and 1.0V on the other sounds good,but do the figures change as you rotate the engine?
John
11.5V on one side and 1.0V on the other sounds good,but do the figures change as you rotate the engine?
John
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john.p.clegg - Coveted Fifth Gear
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Is your static advance set correctly? When I converted to electronic ignition I had to guess at a static setting. I kept rotating the distributor until I heard a "cough" then moved it a bit more until the engine would fire. I knew my plugs were firing as I put an inductive timing light clamp on the HT leads and cranked the engine while looking for the light to flash (it did!).
Mechanical Engineer, happily retired!
'67 S3 SE FHC
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'67 S3 SE FHC
See Facebook page: W J Barry Photography
Put your money where your mouse is, click on "Support LotusElan.net" below.
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Galwaylotus - Coveted Fifth Gear
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Hi, I had similar problems with 2 Pertronix units and fortunately had the original Lucas unit to keep me going till I bought an Accuspark dizzy. My local mechanic said early Pertronix units were reliable but had questions about latest type.
Cheers, Ian
Cheers, Ian
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