Hello,
Backstory:
I was having some issues with my 99 SLK230, at first it was throwing these error codes: P1420, P1525, P1236, P0304, P1235, P0443 . I've done enough research to find that it was potentially the k40 relay being burnt... So I took it out of its casing and sure enough the A3 was semi-crispy... So I re-soldered that area as well as a few others that looked weak (I used a professional soldering tool that heats high)... Plugged it back in and it ran even worse then before! I was thinking maybe I soldered wrong because when I would accelerate it would chug as if it's going to die. Then I let it run for a few minutes in idle came back out and it would move forward and reverse with extreme chugging. I scanned it and now it shows only P0304 & P0303 ... PROGRESS!
Issue:
The P0303 & P0304 is causing it to chug horribly, I can't WOT the gas pedal or it'll kill the RPM's to around 500. I see these are misfirings and you can definetely hear it... But I am unsure what would cause not just one, but TWO misfirings.. including one new one.
I haven't checked the injectors or spark plugs yet (I have however added some fuel additive [NOT TECHRON] that is supposed to help clean the injectors), I havent cleaned the MAF (I have cleaner), I havent swapped the coil packs yet either...
I do not want to do a compression test yet until all other routes have been taken.
Potential solution:
I was thinking about cleaning the MAF with some cleaner & letting it run for a good 5-10 minutes on idle and test it out. Or potentially going and swapping the spark plugs and injectors.
Thank you all,
Alex
PS: Sorry for my poor writing skills. Also sorry my first thread isn't an introduction thread!
Backstory:
I was having some issues with my 99 SLK230, at first it was throwing these error codes: P1420, P1525, P1236, P0304, P1235, P0443 . I've done enough research to find that it was potentially the k40 relay being burnt... So I took it out of its casing and sure enough the A3 was semi-crispy... So I re-soldered that area as well as a few others that looked weak (I used a professional soldering tool that heats high)... Plugged it back in and it ran even worse then before! I was thinking maybe I soldered wrong because when I would accelerate it would chug as if it's going to die. Then I let it run for a few minutes in idle came back out and it would move forward and reverse with extreme chugging. I scanned it and now it shows only P0304 & P0303 ... PROGRESS!
Issue:
The P0303 & P0304 is causing it to chug horribly, I can't WOT the gas pedal or it'll kill the RPM's to around 500. I see these are misfirings and you can definetely hear it... But I am unsure what would cause not just one, but TWO misfirings.. including one new one.
I haven't checked the injectors or spark plugs yet (I have however added some fuel additive [NOT TECHRON] that is supposed to help clean the injectors), I havent cleaned the MAF (I have cleaner), I havent swapped the coil packs yet either...
I do not want to do a compression test yet until all other routes have been taken.
Potential solution:
I was thinking about cleaning the MAF with some cleaner & letting it run for a good 5-10 minutes on idle and test it out. Or potentially going and swapping the spark plugs and injectors.
Thank you all,
Alex
PS: Sorry for my poor writing skills. Also sorry my first thread isn't an introduction thread!