Author Topic: Weird intermittent spark (Read 5655 times)

Sdsbassist · « **on:** March 18, 2016, 03:32:38 PM »

Found cyl 1 pipe was cold. When I hooked up a timing light to the wore, found that it was sparking, but inconsistent. 4 looks fine. Check connections?

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Gene · « **Reply #1 on:** March 18, 2016, 03:35:48 PM »

Replace the plug cap? Clip back about 1/4 of the wire for a good connection. Cheap, easy check.

Stev-o · « **Reply #2 on:** March 18, 2016, 03:56:13 PM »

Did you replace plugs, points, condensers & caps?

If no, C'mon Man!

Sdsbassist · « **Reply #3 on:** March 18, 2016, 04:08:48 PM »

It's just the one cyl which should Elim what steve just said. I tried two plugs in cyl 1 plug boot and it was arcing more widely than the others. Bad cap?

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Sdsbassist · « **Reply #4 on:** March 18, 2016, 05:05:00 PM »

The other issue could be gas I'm guessing

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Sdsbassist · « **Reply #5 on:** March 18, 2016, 05:16:35 PM »

Just pulled plugs and it's wet....flooded?

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HondaMan · « **Reply #6 on:** March 18, 2016, 06:26:18 PM »

Quote from: Sdsbassist on March 18, 2016, 05:16:35 PM

Just pulled plugs and it's wet....flooded?

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Just wet, from not firing..

Sdsbassist · « **Reply #7 on:** March 18, 2016, 06:28:42 PM »

So would the weird arching cause it to not even spark when it actually in the cylinder.

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Sdsbassist · « **Reply #8 on:** March 18, 2016, 06:31:37 PM »

I'm considering plugging wire 1 to 4, and 4 to one to see if that makes any change. Would narrow it down to wires or carbs?

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Sdsbassist · « **Reply #9 on:** March 18, 2016, 06:42:49 PM »

here is a bad interpretation of what I see what I ground plugs to head to test them. #1 shoots the spark more randomnly then the others.

Stev-o · « **Reply #10 on:** March 18, 2016, 07:14:57 PM »

Did you replace plugs, points, condensers & caps?

If you are not going to give it a proper tune up, you are just going to chase your tail.

Sdsbassist · « **Reply #11 on:** March 18, 2016, 07:15:46 PM »

No.

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calj737 · « **Reply #12 on:** March 18, 2016, 07:48:11 PM »

Yes, swapping 1/4 plug leads might produce different results. If the problem follows the lead, then you have a cap or wire problem (likely). If not, then you have a plug problem (likely).

You said the plug was, but was it clean and wet? Or fouled and wet?

Sdsbassist · « **Reply #13 on:** March 18, 2016, 07:55:24 PM »

Are any of you suspecting coals?

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Stev-o · « **Reply #14 on:** March 18, 2016, 07:57:16 PM »

Quote from: Sdsbassist on March 18, 2016, 07:55:24 PM

Are any of you suspecting coals?

I would bet it's not coals

Sdsbassist · « **Reply #15 on:** March 18, 2016, 07:57:54 PM »

I'm cool with that. Does honda carry boots? Any better value or brand?

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Sdsbassist · « **Reply #16 on:** March 18, 2016, 07:58:31 PM »

Quote from: Stev-o on March 18, 2016, 07:57:16 PM

Quote from: Sdsbassist on March 18, 2016, 07:55:24 PM
Are any of you suspecting coals?

I would bet it's not coals

It's gonna be something simple. She sounded good on 3 cyl. She will sound amazing on 4

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calj737 · « **Reply #17 on:** March 18, 2016, 07:58:56 PM »

Quote from: Stev-o on March 18, 2016, 07:57:16 PM

Quote from: Sdsbassist on March 18, 2016, 07:55:24 PM
Are any of you suspecting coals?
I would bet it's not coals

And I doubt its the coils either

Did you swap the plug leads yet?

Sdsbassist · « **Reply #18 on:** March 18, 2016, 07:59:26 PM »

Yes and I really wanna try but got 4 kids sleeping. Before lunch tomorrow

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calj737 · « **Reply #19 on:** March 18, 2016, 08:01:16 PM »

That's no excuse, wake those brats up to the roar of your SOHC4!!!! You've got members waiting on you tick, tock, tick, tock...

Sdsbassist · « **Reply #20 on:** March 18, 2016, 08:01:37 PM »

Don't do this to me bro!!

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calj737 · « **Reply #21 on:** March 18, 2016, 08:03:27 PM »

Daddy DayCare! Daddy DayCare!

Well just update us on the outcome. If you can sneak away, something that you can do quietly is to test the resistance of each cap and post those results. If you need to be indoors and monitor sleeping angels, then that can wait too.

Sdsbassist · « **Reply #22 on:** March 18, 2016, 08:04:21 PM »

I closed that up for the night. But that post was definitely the best ever.

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Stev-o · « **Reply #23 on:** March 18, 2016, 08:29:39 PM »

Quote from: Sdsbassist on March 18, 2016, 07:57:54 PM

I'm cool with that. Does honda carry boots?

I'm guessing you mean plug caps. NGK....

http://www.ebay.com/itm/HONDA-SOHC-CB750-CB750K-CB750F-CB750A-NGK-SPARK-PLUG-WIRE-RESISTOR-CAPS-/311312216593?hash=item487ba77211:g:SkwAAOSwpDdU-7-u&vxp=mtr

Sdsbassist · « **Reply #24 on:** March 19, 2016, 11:57:19 AM »

So put in a different plug, swapped the 1 and 4s and started for 2 min. 1 pipe still cold cold cold. Still damp with a bit of fuel smell.

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Author Topic: Weird intermittent spark (Read 5655 times)