Fuel system cleaner / P0300
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Joined: May 2013
Posts: 120
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From: Florida
2008 S65 AMG, 2005 SL65 AMG, 2005 Porsche Carrera, 2011 Shelby GT500, 2001 Acura CL Type S
Fuel system cleaner / P0300
I have been getting a random P0300 ("multiple misfire") code and clearing it. I have new sparkplugs and new coil packs.
Car runs fine and from what I have read so far, adding some fuel system cleaner like "Seafoam" might help. Before I do that
, I wanted to ask if anyone had this problem with the CL?
Thank you,
S.
Car runs fine and from what I have read so far, adding some fuel system cleaner like "Seafoam" might help. Before I do that
, I wanted to ask if anyone had this problem with the CL?Thank you,
S.
Member
Joined: Dec 2009
Posts: 192
Likes: 4
From: Western New York, USA
2004 CL500
no misfire problems here, but I'd be careful what ya dump into it. the only non MB fuel additive that the manufacturer approves (that I know of) is Techron by Chevron. I've used it several times
Thread Starter
Member
Joined: May 2013
Posts: 120
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From: Florida
2008 S65 AMG, 2005 SL65 AMG, 2005 Porsche Carrera, 2011 Shelby GT500, 2001 Acura CL Type S
I have brand new spark plugs, brand new coil packs, drove car for 1200+ miles, no loss in power, no weird noises. Added techron twice on half-empty tank, then I added Seafoam after that. Car responds even better after two techrons and seafoam.
Car runs great. After I reset the check engine code, it comes up again while driving without loss in power or any other indications.
I won't be able to take the car to service for another month. Thank you for your suggestions, I will add that to the list for checkup.
Btw, I am getting 19.6mpg with the CL (spirited and "normal" hwy driving combined. If you are not taking your CL to the open road, you are not fully enjoying it It is literally awesome - it inspires awe and it is a bit terrifying
Car runs great. After I reset the check engine code, it comes up again while driving without loss in power or any other indications.
I won't be able to take the car to service for another month. Thank you for your suggestions, I will add that to the list for checkup.
Btw, I am getting 19.6mpg with the CL (spirited and "normal" hwy driving combined
. If you are not taking your CL to the open road, you are not fully enjoying it It is literally awesome - it inspires awe and it is a bit terrifying
Last edited by CL600CK60V12; May 26, 2015 at 09:37 AM. Reason: md
Thread Starter
Member
Joined: May 2013
Posts: 120
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From: Florida
2008 S65 AMG, 2005 SL65 AMG, 2005 Porsche Carrera, 2011 Shelby GT500, 2001 Acura CL Type S
P0300
I can clear the code with Actron but the P300 code (random misfire) comes back after a while ("P0300 Mod $10") while driving but without any loss of power.
Now that you mention the battery: I did have the new battery installed just before the road trip because the old one was too weak.
In May, I took the CL600 on a road trip. On the first leg of 1300 miles, I poured two bottles of Techron and two bottles of Seafoam - this improved the throttle response and car drives like a dream. Absolutely no hesitation. Frightening acceleration
The beast is getting 19.6mpg, 400-mile range on a full tank.
In fact, since running through the second bottle of "Seafoam", the code has been cleared and did not come back for a week now - knock on wood.
This year, I am putting some miles on this thing - no more "garage queen".
Now that you mention the battery: I did have the new battery installed just before the road trip because the old one was too weak.
In May, I took the CL600 on a road trip. On the first leg of 1300 miles, I poured two bottles of Techron and two bottles of Seafoam - this improved the throttle response and car drives like a dream. Absolutely no hesitation. Frightening acceleration
The beast is getting 19.6mpg, 400-mile range on a full tank.
In fact, since running through the second bottle of "Seafoam", the code has been cleared and did not come back for a week now - knock on wood.
This year, I am putting some miles on this thing - no more "garage queen".
Last edited by CL600CK60V12; May 30, 2015 at 09:08 PM. Reason: md
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Thread Starter
Member
Joined: May 2013
Posts: 120
Likes: 0
From: Florida
2008 S65 AMG, 2005 SL65 AMG, 2005 Porsche Carrera, 2011 Shelby GT500, 2001 Acura CL Type S
Seafoam
yes - I put "Seafoam" in the fuel tank.
Last edited by CL600CK60V12; Jun 1, 2015 at 06:00 PM. Reason: md
Thread Starter
Member
Joined: May 2013
Posts: 120
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From: Florida
2008 S65 AMG, 2005 SL65 AMG, 2005 Porsche Carrera, 2011 Shelby GT500, 2001 Acura CL Type S
Also, this car does not like humidity and I am still struggling how to keep it away from electrical components. Even though ESP is enclosed in the plastic box under the hood, that box is not airtight. It is the worst place for sensitive electronics.
It also does not like heat. Driving in 75F+ weather leads to "heat soak". Even though I read the extensive thread about pumps and heat exchangers, it is still not clear to me which pump/heat exchanger combination would circulate enough coolant to reduce heat soak. Renntech offers a cooling upgrade but I cannot find any real data on how effective it is.
It also does not like heat. Driving in 75F+ weather leads to "heat soak". Even though I read the extensive thread about pumps and heat exchangers, it is still not clear to me which pump/heat exchanger combination would circulate enough coolant to reduce heat soak. Renntech offers a cooling upgrade but I cannot find any real data on how effective it is.
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Joined: Nov 2007
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From: Gulf Coast but not Florida
GLK350, SL63 AMG
seafoam is not MB certified nor is BG
I would stick with regular use of Chevron Techron. They spent the money to pass the certification test. I called Seafoam and BG that some dealers use; they have no plans to seek MB certfication
After a period of non-driving, I had a stumble in one cylinder in the CL55. I filled up with Shell 93 and two TechronsI'm told dealer have hide the BG equiptment when the MB factory service folks come buy eek:
Regular use of Techron beats buying spark packs for no reason.
After a period of non-driving, I had a stumble in one cylinder in the CL55. I filled up with Shell 93 and two TechronsI'm told dealer have hide the BG equiptment when the MB factory service folks come buy eek:
Regular use of Techron beats buying spark packs for no reason.
Thread Starter
Member
Joined: May 2013
Posts: 120
Likes: 0
From: Florida
2008 S65 AMG, 2005 SL65 AMG, 2005 Porsche Carrera, 2011 Shelby GT500, 2001 Acura CL Type S
Seafoam
I drove the CL for 3000+ miles recently and used two bottles of 20oz Techron and three bottles of Seafoam.
Car responds much better now and it sounds much more aggressive. Fuel economy improved also.
I added Techron/Seafoam to half a tank each time and drove until the needle was half in the "red", then filled up, drove to half a tank, repeat the process.
Car responds much better now and it sounds much more aggressive. Fuel economy improved also.
I added Techron/Seafoam to half a tank each time and drove until the needle was half in the "red", then filled up, drove to half a tank, repeat the process.
