car jerks while driving

1999 HYUNDAI SONATA
105,000 MILES
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SONIMJN
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  • 3 POSTS
hard to pick up normal speed, seems like it jerks when it has to change gear, heat not working gas pedal has to be pushed all the way sometimes to gain speed. Harder going up on hills, doesn't go fast enough, seems to jerk whenever i try to increase speed as if it jerks to change gear. Heat just stopped working, checked anit-freeze fluid,it's full and no water leaking. Not sure what is wrong with it. transmission fluid is also full.
Mar 15, 2012 at 8:08 PM
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FIXITMR
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Tune up? possible CAT plugged?
Mar 15, 2012 at 8:20 PM
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SONIMJN
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  • 3 POSTS
no heat , only cool air blows
Mar 16, 2012 at 1:36 AM
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FIXITMR
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do you have auto or manual temp control. is CEL coming on?
Mar 16, 2012 at 5:47 AM
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SONIMJN
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yes, check engine light is on, I think its manual temp control , its got knob for hot/cool and buttons for AC, defrost and a knob for different sides of air from vents
Mar 16, 2012 at 3:38 PM
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FIXITMR
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you need to get light codes read and post back with them.
Mar 16, 2012 at 5:08 PM