Pinging sound and red header
Thread Starter
Junior Member
Joined: Jan 2019
Posts: 67
Likes: 1
W203 C32 amg
Pinging sound and red header
So I recently replaced my tps map sensor throttle body, new o2 sensors due to code p0221, car was running like **** but after all that it’s gotten better still idled a little high. After replacing I started up the car after about 3-5 min I noticed my header (driver side) was starting to flow red. What could be the cause of this? Also there’s a pinging sound.
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So I recently replaced my tps map sensor throttle body, new o2 sensors due to code p0221, car was running like **** but after all that it’s gotten better still idled a little high. After replacing I started up the car after about 3-5 min I noticed my header (driver side) was starting to flow red. What could be the cause of this? Also there’s a pinging sound.
I recommend that you remove your exhaust system to check the header and cats for any signs of wear. I would not drive the vehicle in the meanwhile, to avoid any further serious damage.
Did you record the a video or sound file?
Hope that helps.
Thread Starter
Junior Member
Joined: Jan 2019
Posts: 67
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W203 C32 amg
Some OEM headers tend to crack on the inside without you noticing it, since the material is double-walled. The loose metal parts can clog the header and cause high temperatures. The other issue could be a melting or clogged catalytic converter. Oil consumption or aging can cause the cat to melt or break. Then the engine could suck parts of the cat into the header or (worst case) combustion chamber. This could cause severe damage to your engine.
I recommend that you remove your exhaust system to check the header and cats for any signs of wear. I would not drive the vehicle in the meanwhile, to avoid any further serious damage.
Did you record the a video or sound file?
Hope that helps.
I recommend that you remove your exhaust system to check the header and cats for any signs of wear. I would not drive the vehicle in the meanwhile, to avoid any further serious damage.
Did you record the a video or sound file?
Hope that helps.
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Joined: May 2009
Posts: 79
Likes: 31
.
If you don’t have cats and a single walled header, you can ignore my post above.
Sounds more like a bearing to me. Have you tried running the engine with the belt off(only for a few seconds because everything with a belt is out of operation)? Could also be a bad supercharger bearing.
This would not explain the glowing header on the driver side though.
Keep us posted and good luck!
Thread Starter
Junior Member
Joined: Jan 2019
Posts: 67
Likes: 1
W203 C32 amg
If you don’t have cats and a single walled header, you can ignore my post above.
Sounds more like a bearing to me. Have you tried running the engine with the belt off(only for a few seconds because everything with a belt is out of operation)? Could also be a bad supercharger bearing.
This would not explain the glowing header on the driver side though.
Keep us posted and good luck!
Sounds more like a bearing to me. Have you tried running the engine with the belt off(only for a few seconds because everything with a belt is out of operation)? Could also be a bad supercharger bearing.
This would not explain the glowing header on the driver side though.
Keep us posted and good luck!
Member
Joined: Jun 2018
Posts: 249
Likes: 44
From: San Antonio, TX
2005 C55 AMG
Running super lean would cause excessive engine temps to the point of meltdown (it would also explain the pinging). Since you just replaced the TPS and O2 sensors, I'd start there. Either one or more of the new sensors is bad or the wrong specs - did you use OEM or universal/aftermarket sensors? Check the fuel trims, O2 sensor readings, MAF rate etc. A scan tool with live data would pick that up...
Did you replace just the TPS sensor or the whole MAF and or throttle body? Many have problems with non-OEM MAF sensors. Buy only OEM or genuine Bosch from a reputable seller. There is a strong possibility that there's a massive air leak somewhere. Did you get everything sealed up?
Swap the old sensors back in to troubleshoot.
Code P0221 is Throttle/Pedal Position Sensor/Switch B Circuit Range/Performance Problem. The accelerator pedals themselves also occasionally go bad. You may have been barking up the wrong tree with O2 sensors and need a new pedal. There are threads here about that.
Did you replace just the TPS sensor or the whole MAF and or throttle body? Many have problems with non-OEM MAF sensors. Buy only OEM or genuine Bosch from a reputable seller. There is a strong possibility that there's a massive air leak somewhere. Did you get everything sealed up?
Swap the old sensors back in to troubleshoot.
Code P0221 is Throttle/Pedal Position Sensor/Switch B Circuit Range/Performance Problem. The accelerator pedals themselves also occasionally go bad. You may have been barking up the wrong tree with O2 sensors and need a new pedal. There are threads here about that.
Last edited by Spooky55; Feb 8, 2021 at 10:45 PM.
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Thread Starter
Junior Member
Joined: Jan 2019
Posts: 67
Likes: 1
W203 C32 amg
Running super lean would cause excessive engine temps to the point of meltdown (it would also explain the pinging). Since you just replaced the TPS and O2 sensors, I'd start there. Either one or more of the new sensors is bad or the wrong specs - did you use OEM or universal/aftermarket sensors? Check the fuel trims, O2 sensor readings, MAF rate etc. A scan tool with live data would pick that up...
Did you replace just the TPS sensor or the whole MAF and or throttle body? Many have problems with non-OEM MAF sensors. Buy only OEM or genuine Bosch from a reputable seller. There is a strong possibility that there's a massive air leak somewhere. Did you get everything sealed up?
Swap the old sensors back in to troubleshoot.
Code P0221 is Throttle/Pedal Position Sensor/Switch B Circuit Range/Performance Problem. The accelerator pedals themselves also occasionally go bad. You may have been barking up the wrong tree with O2 sensors and need a new pedal. There are threads here about that.
Did you replace just the TPS sensor or the whole MAF and or throttle body? Many have problems with non-OEM MAF sensors. Buy only OEM or genuine Bosch from a reputable seller. There is a strong possibility that there's a massive air leak somewhere. Did you get everything sealed up?
Swap the old sensors back in to troubleshoot.
Code P0221 is Throttle/Pedal Position Sensor/Switch B Circuit Range/Performance Problem. The accelerator pedals themselves also occasionally go bad. You may have been barking up the wrong tree with O2 sensors and need a new pedal. There are threads here about that.
replaced entire throttle body, besides harness. So new throttle body, new map sensor new tps, new o2 sensors. Everything is oem from fcpeuro.
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Member
Joined: Jun 2018
Posts: 249
Likes: 44
From: San Antonio, TX
2005 C55 AMG
Well, it sounds like you bought all the right parts... I still suspect a lean condition from a large air leak or bad sensor causing excessive fuel trims. If it's a bad sensor, at least FCP is good about replacements but you don't want to melt your motor in the meantime. Could also be a leak after the MAF or around the throttle body or even something as simple as a clogged fuel filter or injectors. Spray some starting fluid down around the throttle body and see if the idle changes.
Did you change the fuel filter by chance? It sounds like you're buying everything OEM, but on the off chance - the fuel regulator is built into the stock fuel filter.
When did the car start running poorly and throwing codes? Were the headers and downpipes installed recently or had they been there awhile? You may need a tune to compensate for the freer flowing exhaust - that may be beyond the ECU's ability to adjust enough without help.
Take a look at the fuel trims, MAF rates, and O2 sensor readings. I wouldn't spend any more money throwing parts at it. Look at the data - the answer is there somewhere.
Did you change the fuel filter by chance? It sounds like you're buying everything OEM, but on the off chance - the fuel regulator is built into the stock fuel filter.
When did the car start running poorly and throwing codes? Were the headers and downpipes installed recently or had they been there awhile? You may need a tune to compensate for the freer flowing exhaust - that may be beyond the ECU's ability to adjust enough without help.
Take a look at the fuel trims, MAF rates, and O2 sensor readings. I wouldn't spend any more money throwing parts at it. Look at the data - the answer is there somewhere.
Last edited by Spooky55; Feb 10, 2021 at 05:20 AM.
Junior Member
Joined: Oct 2019
Posts: 53
Likes: 8
From: Melbourne
2002 C32 AMG (SOLD), 2004 C55 AMG
What's the more detailed code? P0221 is generic - star, autel, icarsoft scanners will give you specific codes. Either way, this can relate to either your TPS plug or TB plug depending on the code. In my case, I had codes for TB actuators, replaced it and it persisted. Replacing the plug of the harness solved it.
