Is this enough spark

Anonymous-0 · Dec 17, 2011

Working on issues with a IHC B414 that does not want to run, tested compression 145 - 150. Does not appear to have manifold leak good suction on intake and strong exaust pressure.

With a in line spark tester I get the following result on each cylinder
Turn key from off to run, very tiny weak flicker, turn to start and through four counts : 1 weak , 2 weak , 3 weak , 4 dull strong spark.

Do I have spark ignition issues here, what should the point gap be set at

rustyfarmall · Dec 17, 2011

(quoted from post at 08:08:35 12/17/11) Working on issues with a IHC B414 that does not want to run, tested compression 145 - 150. Does not appear to have manifold leak good suction on intake and strong exaust pressure.

With a in line spark tester I get the following result on each cylinder
Turn key from off to run, very tiny weak flicker, turn to start and through four counts : 1 weak , 2 weak , 3 weak , 4 dull strong spark.

Do I have spark ignition issues here, what should the point gap be set at

Don't know the gap, but the points might just be dirty. Remove the distributor cap, remove the rotor, and then fold a one dollar in half, manually open the points and drag that dollar bill through them. Do it two or three times until the bill comes out clean.

teddy52food · Dec 17, 2011

You have a bad cap or rotor. You shouldn"t be getting those 3 weak sparks at all.

Bob M · Dec 17, 2011

Pull the wire from the center post on the dist cap and put your tester (or a good spark plug) on the end.

Now while crank the engine - you should get a fat, blue spark every half revolution of the crank.

If you do, problem is with the cap/rotor/plug wires. But if spark is still weak be looking for a problem with the points (including point gap), condenser, coil, etc.

old · Dec 17, 2011

I have never had any luck with those fancy spark testers and I just use the old tried and true way. Pull the center wire from the distributor cap and hold it about a 1/4 inch from some bear metal and crank it over. You should get a spark that is blue/white in color and jump that gap. No jump and yellow you got problems. Points I am just guessing but should be around 0.025 give or take a little bit. Also use the same test at all the plug wires and you should get the same thing at all 4 if you do not then you could have a bad rotor or cap if you have it at the coil wire but not the plug wires. Sorry but to me the best test equipment you can have is your own eyes and knowledge.

Tom Fleming · Dec 17, 2011

Really sounds like dirty points to me.

Is this enough spark

Anonymous-0

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rustyfarmall

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teddy52food

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Bob M

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old

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Tom Fleming

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