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Question on ECU

Tiny
JOHNMILAN
  • MEMBER
  • 2001 MERCEDES BENZ CLK430
  • 155,000 MILES
I have recently experienced some odd rpms when idle, stopped at a light, or when going in reverse and after starting the car.
When stopped at a light sometimes the rpms either go up to 16000-20000, or the car feels like it is going to stall. When going in reverse the car feels like it is going to stall, when idle and then accelerating, the car feels very sluggish.
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Sunday, May 13th, 2012 AT 8:45 PM

11 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Do you have a check engine light?

Check the fuel pressure, idle air control, EGR valve, and throttle position sensor
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Sunday, May 13th, 2012 AT 9:23 PM
Tiny
JOHNMILAN
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  • 6 POSTS
NO OTHER LIGHT IS ON. You cannot get a cel when the computer is not working. Throttle body was cleaned and nothing changed.
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Sunday, May 13th, 2012 AT 9:30 PM
Tiny
RASMATAZ
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If the computer is no good, I don't think it'll be running
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Sunday, May 13th, 2012 AT 9:41 PM
Tiny
JOHNMILAN
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  • 6 POSTS
Then why would there be no response from a scan? The scanner was tested next on another car and it worked?
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Sunday, May 13th, 2012 AT 10:20 PM
Tiny
RASMATAZ
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Check if the PCM is being powered up-Do you have a scantool or a code reader
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Monday, May 14th, 2012 AT 2:19 AM
Tiny
JOHNMILAN
  • MEMBER
  • 6 POSTS
Yes we used the scantool and no response.
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Monday, May 14th, 2012 AT 3:49 AM
Tiny
RASMATAZ
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You sure the scantool is compatable
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Monday, May 14th, 2012 AT 8:56 AM
Tiny
JOHNMILAN
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  • 6 POSTS
Yes used on a bummer next
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Monday, May 14th, 2012 AT 11:24 AM
Tiny
JOHNMILAN
  • MEMBER
  • 6 POSTS
If the ecu was down, would the srs light, or check engine light go on?
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Monday, May 14th, 2012 AT 11:31 AM
Tiny
MIKE H R
  • MECHANIC
  • 3,094 POSTS
Hey Raz I need some quick help! This is Mike from South Carolina. Have some friends here that need to go back North for work tomorrow. His jeep wont start has juice. Can you tell me where the neutral safetty switch and where the fuse is for it so I can get them on there way. Can not get into to Mitchell and Don't have a updated book. Your help would be appreaciated Mike. By the way How is the weather? Will talk later Mike Ritzel
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Sunday, May 27th, 2012 AT 5:31 PM
Tiny
RASMATAZ
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No problem -What year and model?
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Sunday, May 27th, 2012 AT 9:32 PM

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