Question about 2005 Kia Sportage
The "rattle" will be detonation caused by spontaneous combustion from incorrect air/fuel ratio and incorrect ignition timing
it is most prominent under acceleration or under load ( up hills , high speeds etc) and will melt pistons if left unattended
run the fault codes to find the faulty sensors , but I suspect that the heated oxygen sensors(HO2S) in the exhaust manifolds before the cat converters will be at fault as they report the gas composition back to the ECM so that the mixture can be adjusted correctly ( indicated by the poor economy)
there are knock sensors on the block which are indicated as faulty as they should be reporting this condition to the ECM to adjust the settings
finally it could come down to low fuel pressure or faulty injectors
what ever it is you need to get a proper fault code reading and have the problem fixed asap as it will cause engine damage if not fixed
Posted on Jun 25, 2017
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Posted on Jan 02, 2017
SOURCE: Engine rattle
It could very well be! Now that you mention it, the exhaust does sound louder when the engine is cold. Could that be a leak or something? But, it does get quieter after it warms up. Thanks for the response!
Posted on Aug 20, 2008
Possibility its the speedometer if it speeds up and slows down . If cable driven make sure cable ois fully seated and locked in place. good luck
Posted on May 07, 2009
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