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

Saturday, March 20th, 2010 AT 8:49 PM

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?

Was this

answer

helpful?

Yes

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

Was this

answer

helpful?

Yes

-1

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

Was this

answer

helpful?

Yes

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

SLAVICA