2002 C320 throttle body Oscillating
Thread Starter
Member
Joined: Aug 2012
Posts: 194
Likes: 18
C63 P31, C320
2002 C320 throttle body Oscillating
Can't figure out whats wrong with the car. No check engine lights.
I could use mechanical god right now. No check engine light. Car shakes like an earthquake. Sounds like the throttle body is pulsating opening and closing.
I've changed CPS sensor mass air flow sensor replaced all vacuum hoses. Brand new plugs and wires resealed all valve covers. New engine mounts.
I can't think of anything else about to sell this as a parts car very soon if I can't figure it out
Thread Starter
Member
Joined: Aug 2012
Posts: 194
Likes: 18
C63 P31, C320
MBWorld Fanatic!
Joined: May 2017
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C320
Check live data with the engine running. Throttle position, smooth running, misfire count, temp sensors etc
Last edited by tjts1; Feb 18, 2019 at 11:41 AM.
Thread Starter
Member
Joined: Aug 2012
Posts: 194
Likes: 18
C63 P31, C320
WELLLLLL i fixed the issue. A piece of plastic was stuck inside the EGR valve causing it to stay open. I removed the EGR valve and removed the red plastic clip that came from the DIPSTICK plug. One of the fingers broke off and lodge itself inside the EGR valve. OMFG. The car idles so smooth you can't even tell its running. Just wanted to share the update!
