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| Gas Yamaha Gas Yamaha Golf Cars; G1 through "The Drive" and U-Max Utility Vehicles |
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05-21-2016, 04:11 PM
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#1 |
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Getting Wild
Join Date: May 2016
Location: GTA
Posts: 94
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Slight pop and backfire at low speed...
...especially when going slow around objects, trees etc. At constant speed no problems.
It's a 2003 with fresh 91, can of sea foam, just completely tuned. I only bought it a few weeks ago and it did it then too, but the owner said that it was a trade off for the governor being tweaked fairly aggressively. I thought maybe a tune and fresh fuel would help, but no luck. Is this a symptom of the governor mod? It will do 45 kph (28 mph)  |
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05-22-2016, 10:40 AM
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#2 |
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Getting Wild
Join Date: May 2013
Location: Northeast Michigan
Posts: 141
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Re: Slight pop and backfire at low speed...
Maybe jet is plugged or needs to be jetted properly.
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06-04-2016, 09:34 PM
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#3 |
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Getting Wild
Join Date: May 2016
Location: GTA
Posts: 94
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Re: Slight pop and backfire at low speed...
Is it not a symptom of increasing the governor speed?
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06-05-2016, 01:40 AM
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#4 |
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Gone Wild
Join Date: Jun 2015
Location: NW Iowa
Posts: 1,669
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Re: Slight pop and backfire at low speed...
Air box not sealed?
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06-05-2016, 06:11 AM
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#5 | |
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maintaining a low profile
 Join Date: Oct 2009
Location: SW Virginia USA
Posts: 6,314
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Re: Slight pop and backfire at low speed...
Quote:
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06-05-2016, 06:12 AM
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#6 | |
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Gone Wild
Join Date: Jun 2014
Location: Sunset Bay, TN
Posts: 2,390
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Re: Slight pop and backfire at low speed...
Quote:
What is at play when any engine is backfiring: (1) Timing both ignition as well as valve timing. (2) Air or vacuum leak in the intake tract. (3) Exhaust leak nearest the head. |
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06-05-2016, 06:20 AM
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#7 |
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Gone Wild
Join Date: Sep 2012
Location: Missouri
Posts: 2,755
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Re: Slight pop and backfire at low speed...
If it's just when your driving it slow around things and on and off the throttle it sounds like there's a good chance it may be running lean!
So, make sure the air box is sealed as it should be. Then I'd look at removing, cleaning good and checking the carb. You may have a jetting problem. |
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