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  #1  
Old 01-24-2014, 01:22 AM
ShaneHobson ShaneHobson is offline
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Idle fault

The fault goes like this :
When in Drive with foot on the brake the car idles perfectly. Push the transmission into Neutral or Park position the engine idle swings between too high and too low. Also most of the time the check engine light comes on.

All suggestions are welcome.

Video posted here :
http://www.youtube.com/watch?v=XuAjfoj6Xok
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  #2  
Old 02-02-2014, 03:49 PM
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SilverSpear SilverSpear is offline
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Re: Idle fault

This seems to be a common problem with SVXi lately, my issue didn't go away yet and I am pretty sure it is caused by ICV.

I assume I only need to remove the throttle body to reach the ICV?
If so, how shall we clean it? I've heard it is a very sensitive part to clean, a strong solvent will risk damaging it on the inside.
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  #3  
Old 02-02-2014, 04:38 PM
92 SVX 92 SVX is offline
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Re: Idle fault

Quote:
Originally Posted by SilverSpear View Post
This seems to be a common problem with SVXi lately, my issue didn't go away yet and I am pretty sure it is caused by ICV.

I assume I only need to remove the throttle body to reach the ICV?
If so, how shall we clean it? I've heard it is a very sensitive part to clean, a strong solvent will risk damaging it on the inside.
how about maf sensor cleaner spray in and around?
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Old 02-02-2014, 04:58 PM
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SURTEESS SURTEESS is offline
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Re: Idle fault

What is ICV ?
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  #5  
Old 02-02-2014, 05:12 PM
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Re: Idle fault

Quote:
Originally Posted by SURTEESS View Post
What is ICV ?
ICV Cleaning
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  #6  
Old 02-03-2014, 03:38 AM
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SOLVED: Idle fault

As I suspected, removed the ICV today and had it cleaned with Carb Cleaner then Electronic Contact Cleaner, and put it back together. Car is AS NEW again. The idle stabilized as it should and I am extremely happy now.
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1994 Silver SVX in hybernation, awaiting for the monsterous awakening (Lebanon)
1967 Mercedes-Benz 250SL Euro Specs, Hard/Softtop, White/Red. Under Complete Restoration
2013 Mercedes-Benz SL350 Euro Specs, White/Red. Mint... Another step into SL Collection.
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  #7  
Old 10-05-2014, 01:17 AM
ShaneHobson ShaneHobson is offline
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Re: Idle fault [solved]

Finally got around to taking my car to Hamish to sort out the three check engine codes and idle fault.

Idle fault is as described in original posting.
CEL codes are :
11 crank angle sensor
12 starter switch
37 oxygen sensor

After three days of investigation he finally solved all problems in one step by disconnecting a relay fitted by an auto electrical at the same time as rebuilding the starter motor.

Only been driven 30km so far.
I'll get a 250km trip in on Tuesday.

One of the CELs would pop up after travelling about 70km, so Tuesday will be the real test.

During the diagnostics Hamish also cleaned the two crank sensors and removed an old alarm / immobiliser. These might have been contributing as well.

Once I've proven everything is fault free, I'll take it to Bryan to get the remote starter & new alarm installed.
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  #8  
Old 10-08-2014, 08:51 PM
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SVX8588 SVX8588 is offline
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Re: Idle fault [solved]

Quote:
Originally Posted by ShaneHobson View Post
After three days of investigation he finally solved all problems in one step by disconnecting a relay fitted by an auto electrical at the same time as rebuilding the starter motor.
Can you explain a little more about this relay? I'm also having an electrical idle problem that sounds very similar to yours, though I'm not getting a CEL.
My problem is mostly a high (sometimes very high - 2000 rpms or more) idle, and occasionally a bouncing idle when it's not high.
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