.. Accel coils - Wrist Twisters
 
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post #1 of 12 Old 06-17-2012, 12:21 PM Thread Starter
Tirone
 
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.. Accel coils

..... can a coil [for the #2 and 3 cylinder] be defective at lower RPM's??...only...

it seems like it clears up at the higher RPM's>>>>> it pulls hard.

With the motor cold, and starting the motor up, I can hold the #2 and 3 header pipes with my hands. but, turning the throttle up, they become hot.

just notice it, the other night after a long fast run. and after that run, I changed the plugs, and have the same results.......thanks

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post #2 of 12 Old 06-17-2012, 12:25 PM
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Check plugs 2 & 3, could be your Fuel Pressure Regulator.

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post #3 of 12 Old 06-17-2012, 04:27 PM
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first off what bike are we talking here?

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post #4 of 12 Old 06-17-2012, 05:07 PM
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Quote:
Originally Posted by nd4spdbh View Post
first off what bike are we talking here?
Yea, probably should've asked this...

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post #5 of 12 Old 06-17-2012, 11:10 PM Thread Starter
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..... old school, a 86 Yamaha Fj1200.
So, it does not have a fuel pressure regulator.
is there an easy way to check the coils? before I exchange them.

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post #6 of 12 Old 06-18-2012, 02:08 AM
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I would start with trying to find a FSM for your bike and go through the troubleshooting procedures in it.

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post #7 of 12 Old 06-18-2012, 11:14 AM
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+1, fsm, this is the way to go.
Gut feeling could be spark plugs, but also could be idle circuit of the carb, especially if it was often parked

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post #8 of 12 Old 06-18-2012, 03:29 PM
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ya have the carbs been recently cleaned? if not like stated the slow circuit of the carbs could be blocked.

You could try taking the wires off plugs 2 n 3 one at a time, and hooking to another plug to see if you get spark at lower rpms.... or hook one dem fancy spark plug tester lights inline.

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post #9 of 12 Old 06-18-2012, 04:44 PM Thread Starter
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..... first... thanks for the help guys...... I may have found the problem!!

What I did is, swop the coils, to see if the problem would follow the coil.
and when I pulled the plug wire of off the #3 plug, the little metal boot that connects to the top of the plug, was still on the plug. [broken]
So, I am thinking,.... at low RPM's there is not a good connection [causing the miss].
just ordered, from Dennis Kirk the coil [just to make sure] and wires.

I did call Dyna [ignition], and he said, it is possible that the Dyna ign. could cause that problem..... I have had issues with it before.

and I have had the carbs. apart.

I should receive the new parts, Thursday. Thanks again [time will tell]

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post #10 of 12 Old 06-18-2012, 04:50 PM
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Glad you found your gremlin!

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post #11 of 12 Old 06-18-2012, 09:35 PM Thread Starter
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..... Thanks

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post #12 of 12 Old 06-18-2012, 10:03 PM
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yup.... its very possibly to have the spark not be able to bridge some gap at lower rpms (the break in your boot) but at higher rpms with a more powerful spark.... its able to.

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