2004 Hyundai Sonata car shakes and jumps

SLAVICA

MEMBER
2004 HYUNDAI SONATA
4 CYL
2WD
AUTOMATIC
84,000 MILES

The other day my car didn't want to speed up when I stepped on the gas after slowing down, then a couple of minutes later once I slowed down again it started to shake. Once I came to a complete stop it started jumping even my seat was moving. It also made a loud noise coming from the engine, it sounded like it was going to explode. Does anyone know what this could be? I want to sell it but I need to know if it's something that could be worth fixing first

5 Replies

LEGITIMATE007

MECHANIC
5,121 POSTS

Sounds like the timing belt slipped a few teath, and may have caused some valve damage, will it start? And how does it sound while idling?

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Saturday, March 20th, 2010 AT 8:59 PM

SLAVICA

MEMBER
3 POSTS

It starts but it sounds very loud, then once it warms up the sound quiets down, but once it reaches 2 rpm it sound really loud again, not below, not over only on 2rpm, I dont know if that means anything. I head the timing belt replaced a few weeks ago, and he said he also tightened another belt, forgot which one

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Wednesday, March 24th, 2010 AT 12:57 PM

LEGITIMATE007

MECHANIC
5,121 POSTS

I still think it skipped a few teeth, and caused damage, either that or a push rod, lifter, or rocker arm. I would have a compression test done. That will narrow it down, check the coolant and transmission fluid. Also check the oil and fill them all to specification

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Wednesday, March 24th, 2010 AT 2:09 PM

SLAVICA