2000 Kia Sephia Hiwould Stuck Open Thermostat Make Engine Run Rough Also Could C

2000 KIA SEPHIA
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RIEBED
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hi would a stuck open thermostat make the engine run rough, also could a clogged gas cap do the same?
Dec 22, 2011 at 4:42 AM
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KHLOW2008
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The stuck open thermostat would not cause the problem but a faulty gas cap would as it involves the EVAP system.
Dec 22, 2011 at 12:01 PM
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the reason I suspect this to be atleast part of the issue is that it happens even more intensely after I get gas-I will have the cap checked by a mechanic(pressure gauge I suspect) or what?

Thanks for the response
Dec 22, 2011 at 3:32 PM
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MHPAUTOS
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Replace the thermostat as well if it is suspect, if stuck open the engine may run to cool and this will affect tune as the coolant temp sensor, fit a new cap and report back what the effect is.
Dec 23, 2011 at 8:56 PM
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Thanks for the reply-I followed what you recommended to do and it did smooth out substancially-
Thanks Again
Dec 24, 2011 at 9:10 PM
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