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engine miss/skip

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Old Sep 1, 2015 | 07:50 PM
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Default engine miss/skip

I'm looking for suggestions as to why my UC has an intermittent skip/stumble particulary when riding roughly 35 to 40 mph at 2500 rpms. Initially I thought I had gotten a bad tank of gas but it has continued to ride this way for about 2 months now and I have filled it up at reputable stations many times since the problem first arose. It runs fine at highway speeds but runs like crap at slower cruising speeds. Any ideas?
 
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Old Sep 1, 2015 | 08:21 PM
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All stock or has it been tuned?
 
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Old Sep 1, 2015 | 09:35 PM
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Originally Posted by dawg
All stock or has it been tuned?
Stock engine, Thunder Max ECM, after market exhaust, air cleaner.
 
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Old Sep 2, 2015 | 11:22 AM
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I've had similar symptoms happen to me a few times.

1st time the in-tank fuel line had a small hole in it.

2nd time was dirty sensor in the intake, probably the IAC. I locked the throttle open, and hosed every sensor I could see with WD-40.

3rd time turned out to be battery connections. Connections were tight, but needed to be really tight.
 
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