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2001 Kia Sephia engine vibration

Tiny
BDBSNOWBOARDER
  • MEMBER
  • 2001 KIA SEPHIA
  • 118,000 MILES
At idle while in drive/reverse the engine idles very rough. There is no CEL. I have changed spark plugs, wires, coils, disassembled the throttle body and cleaned it along with the IAC, replaced all motor/trans mounts, inspected vacuum hose's, replaced air filter. Still no fix whats next?
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Thursday, November 21st, 2013 AT 7:00 AM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check fuel pressure with a gauge and check compression auto parts rent gauges
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Thursday, November 21st, 2013 AT 7:04 AM
Tiny
BDBSNOWBOARDER
  • MEMBER
  • 2 POSTS
What should my pressure and compression be?
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Thursday, November 21st, 2013 AT 7:08 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Fuel pressure 46-51psi should be at least 25 psi after engine shutoff for 15 minutes. Compression can vary 193 psi is new so if below that ok but there should not be a variance of 20% per cylinder.
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Thursday, November 21st, 2013 AT 7:25 AM

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