PLEASE HELP! Still have SC issues...

dirtyhogan · 11-04-2009, 01:43 AM

Replaced BOSCH with Johnson CM30 pump, replaced IAT sensor, replaced fuses, bled coolant, I have no clue where the relay is in front of the SAM.
and my SC still cuts out.

I removed the pannel in the wheel well and can feel the pump pumping when the car is running. Is there a chance this pump is not pumping at full potential becuase of a relay issue?

Stock pulley, stock HE...

I'm lost for where to go next! Should I hook up an OBD2 and check intake temps? What are normal readings on these cars?

What else could be the problem?

SC runs when I first start the car, pulls until it gets mildly hot then cuts out, if I cruise without throttle it cuts back in briefly then cuts back out which leads me to believe it's either a problem with my computers ability to properly read IAT's or my sytem is not cooling properly.

Any tests or suggestions to narrow down this issue?

Is there anything else that could be causing this problem?

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Beaker · 11-04-2009, 02:30 AM

The issue you described second last sentence is 100% what I have... but I haven't put in a CM30 yet (have ordered one)..

I know when I hooked up to the computer to check errors with my mechanic the other day he said there were some IAT warnings and so I'm going to replace the sensors .. but you seem to have already done that so I'm not help!

Hope you find the answer's you're looking for..

gt4awd · 11-04-2009, 02:41 AM

If the new pump is running the relay should be good. So that takes the pump, relay, IAT sensor, fuses, and air in line out of the question. Not sure what's left to check after that, but hopefully someone will know. Quick question. What is the average temperature in your area at this time?

dirtyhogan · 11-04-2009, 02:54 AM

30 to 40f, I"m lost for ideas... Only thing I can think of is some fault from the IAT to the ECU...

gt4awd · 11-04-2009, 03:00 AM

One thing that comes to mind is a problem with the electromagnetic clutch on the supercharger... You can verify this by monitoring the IAT, and if the supercharger is disengaged below 195F you have a problem with the clutch

dirtyhogan · 11-04-2009, 03:42 AM

Hmm... Sounds good, two wires going to the clutch wonder in there could be a short there... Got any test ideas?

TemjinX2 · 11-04-2009, 04:18 AM

maybe check for air bubbles in the coolant lines?

dirtyhogan · 11-04-2009, 04:20 AM

checked that.. bled the lines quite a few times... Maybe I've got a leaky ic and thats creating air in the system and adding heat.

dirtyhogan · 11-04-2009, 04:34 AM

I'm going to make my reservoir and see if it's losing coolant.

TemjinX2 · 11-04-2009, 04:36 AM

i had a leaky intercooler and i didn't have my sc cut out. The coolant from my resevoir would get lower and i could see white steam coming from the bottom of the engine when i drive for a while and let it sit.

TemjinX2 · 11-04-2009, 04:37 AM

i would get a obd II reader and see if it throws any codes. Preferably if you know anyone with a star machine it'll list the reasons why it cuts out.

dirtyhogan · 11-04-2009, 05:05 AM

No lights are on... MB have soft codes that don't throw CEL's?

TemjinX2 · 11-04-2009, 05:12 AM

you can have codes without throwing a cel. With star you can see all the mercedes codes and history. Usually a cheap obdii reader can still see most of the codes.

dirtyhogan · 11-04-2009, 05:13 AM

sounds good... I'll check that tomorrow, I'll also check IAT's. Thanks again!

W203Ramos · 11-04-2009, 09:53 PM

I can't recall what thread it was but, it was a loose connection on the sc clutch. which caused the sc to disengage despite iat's being normal...if I find the thread I'll post back GL

OBD II SCANNER http://shop.ebay.com/i.html?_kw=obd&...rcedes&_ckw=II saw on ebay hope this helps.

loudandheard · 11-05-2009, 01:42 AM

I'm about to do all the things that you have done. I'm worried I'm going to have the same out come. I did recently change my supercharger bearing, but I think I was having the problem before that. So I'm not sure if the pulley could be affecting the clutch.

dirtyhogan · 11-05-2009, 02:34 AM

Ramos any luck finding that link?

Cheers!

11-04-2009, 02:41 AM	#3
gt4awd Junior Member Join Date: Sep 2008 Posts: 61 Drives: 2002 C32 AMG Kompressor - Silver	If the new pump is running the relay should be good. So that takes the pump, relay, IAT sensor, fuses, and air in line out of the question. Not sure what's left to check after that, but hopefully someone will know. Quick question. What is the average temperature in your area at this time? __________________ 2002 Silver C32 AMG Kompressor Sedan [91,000 Miles] Clear Side Markers - CL Style Grille - Flat Hood Emblem Silencers Removed - NGK Iridium IX - Magnecor KV85 185MM LET - LET Stage 2 ECU - NeedsWings PSK Custom Y-Splitter Intake - Boost & A/F Ratio Guages

11-04-2009, 03:00 AM	#5
gt4awd Junior Member Join Date: Sep 2008 Posts: 61 Drives: 2002 C32 AMG Kompressor - Silver	One thing that comes to mind is a problem with the electromagnetic clutch on the supercharger... You can verify this by monitoring the IAT, and if the supercharger is disengaged below 195F you have a problem with the clutch __________________ 2002 Silver C32 AMG Kompressor Sedan [91,000 Miles] Clear Side Markers - CL Style Grille - Flat Hood Emblem Silencers Removed - NGK Iridium IX - Magnecor KV85 185MM LET - LET Stage 2 ECU - NeedsWings PSK Custom Y-Splitter Intake - Boost & A/F Ratio Guages Last edited by gt4awd; 11-04-2009 at 03:03 AM.

11-04-2009, 04:18 AM	#7
TemjinX2 MBWorld Fanatic! Join Date: Dec 2007 Location: Corona, CA Posts: 3,153 Drives: 02 c32	maybe check for air bubbles in the coolant lines? __________________ 2004 ex civic coupe = sold 1994 Integra gsr jdm front = sold 2002 Mercedes c32 amg = the new project My carputer http://forums.mbworld.org/forums/sho...d.php?t=237456 My tsx retrofit project http://forums.mbworld.org/forums/sho...d.php?t=242212 TemjinX2's rides http://forums.mbworld.org/forums/sho...=1#post3053382 TemjinX2's $20 seat control module fix http://forums.mbworld.org/forums/sho...55#post3068555

11-04-2009, 04:36 AM	#10
TemjinX2 MBWorld Fanatic! Join Date: Dec 2007 Location: Corona, CA Posts: 3,153 Drives: 02 c32	i had a leaky intercooler and i didn't have my sc cut out. The coolant from my resevoir would get lower and i could see white steam coming from the bottom of the engine when i drive for a while and let it sit. __________________ 2004 ex civic coupe = sold 1994 Integra gsr jdm front = sold 2002 Mercedes c32 amg = the new project My carputer http://forums.mbworld.org/forums/sho...d.php?t=237456 My tsx retrofit project http://forums.mbworld.org/forums/sho...d.php?t=242212 TemjinX2's rides http://forums.mbworld.org/forums/sho...=1#post3053382 TemjinX2's $20 seat control module fix http://forums.mbworld.org/forums/sho...55#post3068555

11-04-2009, 04:37 AM	#11
TemjinX2 MBWorld Fanatic! Join Date: Dec 2007 Location: Corona, CA Posts: 3,153 Drives: 02 c32	i would get a obd II reader and see if it throws any codes. Preferably if you know anyone with a star machine it'll list the reasons why it cuts out. __________________ 2004 ex civic coupe = sold 1994 Integra gsr jdm front = sold 2002 Mercedes c32 amg = the new project My carputer http://forums.mbworld.org/forums/sho...d.php?t=237456 My tsx retrofit project http://forums.mbworld.org/forums/sho...d.php?t=242212 TemjinX2's rides http://forums.mbworld.org/forums/sho...=1#post3053382 TemjinX2's $20 seat control module fix http://forums.mbworld.org/forums/sho...55#post3068555

11-04-2009, 02:30 AM	#2
Beaker Junior Member Join Date: Aug 2009 Posts: 17 Drives: 2001 C32 AMG	The issue you described second last sentence is 100% what I have... but I haven't put in a CM30 yet (have ordered one).. I know when I hooked up to the computer to check errors with my mechanic the other day he said there were some IAT warnings and so I'm going to replace the sensors .. but you seem to have already done that so I'm not help! Hope you find the answer's you're looking for..

11-04-2009, 02:54 AM	#4
dirtyhogan Junior Member Join Date: Oct 2009 Posts: 34 Drives: 06 Elise (total loss)	30 to 40f, I"m lost for ideas... Only thing I can think of is some fault from the IAT to the ECU...

11-04-2009, 03:42 AM	#6
dirtyhogan Junior Member Join Date: Oct 2009 Posts: 34 Drives: 06 Elise (total loss)	Hmm... Sounds good, two wires going to the clutch wonder in there could be a short there... Got any test ideas?

11-04-2009, 04:20 AM	#8
dirtyhogan Junior Member Join Date: Oct 2009 Posts: 34 Drives: 06 Elise (total loss)	checked that.. bled the lines quite a few times... Maybe I've got a leaky ic and thats creating air in the system and adding heat.

11-04-2009, 04:34 AM	#9
dirtyhogan Junior Member Join Date: Oct 2009 Posts: 34 Drives: 06 Elise (total loss)	I'm going to make my reservoir and see if it's losing coolant.

11-04-2009, 05:05 AM	#12
dirtyhogan Junior Member Join Date: Oct 2009 Posts: 34 Drives: 06 Elise (total loss)	No lights are on... MB have soft codes that don't throw CEL's?

11-04-2009, 05:12 AM	#13
TemjinX2 MBWorld Fanatic! Join Date: Dec 2007 Location: Corona, CA Posts: 3,153 Drives: 02 c32	you can have codes without throwing a cel. With star you can see all the mercedes codes and history. Usually a cheap obdii reader can still see most of the codes. __________________ 2004 ex civic coupe = sold 1994 Integra gsr jdm front = sold 2002 Mercedes c32 amg = the new project My carputer http://forums.mbworld.org/forums/sho...d.php?t=237456 My tsx retrofit project http://forums.mbworld.org/forums/sho...d.php?t=242212 TemjinX2's rides http://forums.mbworld.org/forums/sho...=1#post3053382 TemjinX2's $20 seat control module fix http://forums.mbworld.org/forums/sho...55#post3068555

11-04-2009, 05:13 AM	#14
dirtyhogan Junior Member Join Date: Oct 2009 Posts: 34 Drives: 06 Elise (total loss)	sounds good... I'll check that tomorrow, I'll also check IAT's. Thanks again!

11-04-2009, 09:53 PM	#15
W203Ramos Member Join Date: Jan 2009 Location: NY Posts: 81 Drives: '03C32 Obsidian Black, 08 C 300 4matic White, '08R350 4matic Majestic Black	I can't recall what thread it was but, it was a loose connection on the sc clutch. which caused the sc to disengage despite iat's being normal...if I find the thread I'll post back GL OBD II SCANNER http://shop.ebay.com/i.html?_kw=obd&...rcedes&_ckw=II saw on ebay hope this helps. __________________ code 3 intake, K&n filters, johnson cm 30 pump. Last edited by W203Ramos; 11-04-2009 at 09:56 PM.

11-05-2009, 01:42 AM	#16
loudandheard Senior Member Join Date: Mar 2007 Location: Houston, TX Posts: 303 Drives: c32 AMG	I'm about to do all the things that you have done. I'm worried I'm going to have the same out come. I did recently change my supercharger bearing, but I think I was having the problem before that. So I'm not sure if the pulley could be affecting the clutch.

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11-05-2009, 02:34 AM	#17
dirtyhogan Junior Member Join Date: Oct 2009 Posts: 34 Drives: 06 Elise (total loss)	Ramos any luck finding that link? Cheers!