WOULD A STUCK OPEN THERMOSTAT MAKE THE ENGINE ...

2000 Kia Sephia

Tiny

riebed

December, 22, 2011 AT 4:42 AM

Hi would a stuck open thermostat make the engine run rough, also could a clogged gas cap do the same?

FOUND 4236 RELATED QUESTIONS

Running Rough

27 ANSWERS
34 IMAGES

Idles Rough/changed Ects

37 ANSWERS
3 IMAGES

4 Answers

Tiny

KHLow2008

December, 22, 2011 AT 12:01 PM

The stuck open thermostat would not cause the problem but a faulty gas cap would as it involves the EVAP system.

Tiny

riebed

December, 22, 2011 AT 3:32 PM

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

Tiny

mhpautos

December, 23, 2011 AT 8:56 PM

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.

Tiny

riebed

December, 24, 2011 AT 9:10 PM

Thanks for the reply-I followed what you recommended to do and it did smooth out substancially-
Thanks Again

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