Misfire Cylinder 1 and 3

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Misfire Cylinder 1 and 3

Postby Roadhog on Jul Fri 26, 2013 8:20 pm

So, I have an annoying misfire on my dune buggy. Carb is good, no vacuum leaks, has electronic ignition which is timed spot on, valves are spot on, spark is good, new plugs... I keep getting a constant misfire on cylinders 1 and 3. By constant I mean they aren't even firing. It sounds like they pick up when you open up the throttle, but not 100%. It's driving me nuts, so any ideas are greatly appreciated. :banghead:
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Re: Misfire Cylinder 1 and 3

Postby YASHA7FOLD on Jul Fri 26, 2013 8:21 pm

Did it ever get hot on you?
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Re: Misfire Cylinder 1 and 3

Postby Roadhog on Jul Fri 26, 2013 8:27 pm

YASHA7FOLD wrote:Did it ever get hot on you?


Nope, has a massive oil cooler. Uploading a video.
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Re: Misfire Cylinder 1 and 3

Postby YASHA7FOLD on Jul Fri 26, 2013 8:39 pm

Do you have a fan on the cooler?
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Re: Misfire Cylinder 1 and 3

Postby YASHA7FOLD on Jul Fri 26, 2013 8:42 pm

Just asking because I have a 92 plate cooler on mine and it still needed a fan. But then again it's under the car. Where is yours located ?
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Re: Misfire Cylinder 1 and 3

Postby Roadhog on Jul Fri 26, 2013 9:15 pm

Yeah, the cooler has a fan and its mounted away from the engine.

Here is a video
[youtube]http://www.youtube.com/watch?v=hNc7TIWDQ6g[/youtube]
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Re: Misfire Cylinder 1 and 3

Postby SweaterVest on Jul Fri 26, 2013 9:20 pm

Compression?


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Re: Misfire Cylinder 1 and 3

Postby Roadhog on Jul Fri 26, 2013 9:23 pm

SweaterVest wrote:Compression?


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Lost my compression tester, but going to buy one tomorrow. Doubt it would lose compression from sitting over the winter, but you never know.
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Re: Misfire Cylinder 1 and 3

Postby YASHA7FOLD on Jul Fri 26, 2013 9:30 pm

Sounds like carb issues. Have you tuned it lately? And a compression test wouldn't hurt either.
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Re: Misfire Cylinder 1 and 3

Postby Roadhog on Jul Fri 26, 2013 9:35 pm

YASHA7FOLD wrote:Sounds like carb issues. Have you tuned it lately? And a compression test wouldn't hurt either.


Maybe, but not sure why it would cause just cylinders 1 and 3 to misfire. I'll grab another carb kit though and go through it again.
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