Replaced CPS. Idles fine, but dies immediately under load. Have scan stats.
Replaced CPS. Idles fine, but dies immediately under load. Have scan stats.
Hello,
For a week my 04 coupe w/52k had been stalling after 10-15 minutes of driving. It would crank, but not restart. After an hour of cooling down, it would start with CEL, but would only run another 5 minutes until it died again. Code was first P0410, secondary air injection system, then a few days later P0335, for CPS.
I got a Duralast CPS from Autozone. The harness plug doesn't click into position like the stock one did; it in is position, but takes little effort to pull off. I bought a K&N recharge kit and soaked the filters pretty well and followed the provided instructions. Bought used; it came with some blue Septre cone air filters.
After install, started right up with no CEL; cleared the ESP light with wheel rotation. It ran idling for a good ten minutes, but as soon as I was in gear and tried to accelerate, it got a CEL and died. I tried this a few times with the same outcome.
I bought an Autel MS310 scan tool. The freeze frame says:
DTC freeze frame - P0335
Fuel system 1 - CL
Fuel system 2 - CL
Load value (%) - 31.4
Engine coolant temp - 187
Short term fuel trim 1 (%) - 6.3
Long term fuel trim 1 (%) - 0.0
Short term fuel trim 2 (%) - 6.3
Long term fuel trim 2 (%) - 0.0
Intake manifold absolute pressure - 12.1
Engine RPM - 2150
Vehicle speed MPH - 11
This is a great site and I have benefited from it for two years. Thanks for all of your support to the community!
For a week my 04 coupe w/52k had been stalling after 10-15 minutes of driving. It would crank, but not restart. After an hour of cooling down, it would start with CEL, but would only run another 5 minutes until it died again. Code was first P0410, secondary air injection system, then a few days later P0335, for CPS.
I got a Duralast CPS from Autozone. The harness plug doesn't click into position like the stock one did; it in is position, but takes little effort to pull off. I bought a K&N recharge kit and soaked the filters pretty well and followed the provided instructions. Bought used; it came with some blue Septre cone air filters.
After install, started right up with no CEL; cleared the ESP light with wheel rotation. It ran idling for a good ten minutes, but as soon as I was in gear and tried to accelerate, it got a CEL and died. I tried this a few times with the same outcome.
I bought an Autel MS310 scan tool. The freeze frame says:
DTC freeze frame - P0335
Fuel system 1 - CL
Fuel system 2 - CL
Load value (%) - 31.4
Engine coolant temp - 187
Short term fuel trim 1 (%) - 6.3
Long term fuel trim 1 (%) - 0.0
Short term fuel trim 2 (%) - 6.3
Long term fuel trim 2 (%) - 0.0
Intake manifold absolute pressure - 12.1
Engine RPM - 2150
Vehicle speed MPH - 11
This is a great site and I have benefited from it for two years. Thanks for all of your support to the community!
Join Date: Jan 2008
Location: North Plains, OR
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Re: Replaced CPS. Idles fine, but dies immediately under load. Have scan stats.
I am going to go out on a limb and say replace the CPS again with one that fastens correctly. I have used the Bosch and a Napa one that is identical (but no MB star) and have had no issues with them. Your connection may be going bad on you when it gets hot... I fought this battle for quite a while previously...
Re: Replaced CPS. Idles fine, but dies immediately under load. Have scan stats.
Thank you for your prompt responses!
I will get a new CPS from Napa; I actually went there, but they were not in stock and sold for $87. Autozone had them in stock for only $55.
Not sure where to get a Bosch, except...Amazon for $39? Bosch 0261210170.
Amazon.com: Bosch Mercedes Benz Crank Reference Position Sensor: Automotive
I will get a new CPS from Napa; I actually went there, but they were not in stock and sold for $87. Autozone had them in stock for only $55.
Not sure where to get a Bosch, except...Amazon for $39? Bosch 0261210170.
Amazon.com: Bosch Mercedes Benz Crank Reference Position Sensor: Automotive
Join Date: Jun 2009
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Join Date: Jan 2008
Location: North Plains, OR
Age: 74
Posts: 5,180
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Received 6 Likes
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5 Posts
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