Codes P0300, P0301, & P0303 etc... HELP!!!

[LasVegas]

have a 2000 c230 Kompressor (W202). It has 175,000 miles.

I was passing a car yesterday and gave it some gas to get by and the check Engine light came on. It drove very rough and badly after the Check Engine light came on. I got it home and checked the codes. There was one code, P0301.

I did a compression check:

Cylinder 1 psi: 160 & 155

Cylinder 2 psi: 130 & 135

Cylinder 3 psi: 160 & 160

Cylinder 4 psi: 120 & 120

I then installed new spark plugs and spark plug wires (I had bought some a month back, hadn’t installed them yet).

I then changed the places of the two coils. I put #1 & #2 coil where coil #3 & #4 was, and vice versa.

Now I have five new Check Engine codes: P0300, P0301, P0303, P0300 P, & P0301 P.

Anyone have any advice or answers. Thanks in advance.

Vegas

 

[toolman1954]

Hi,
Welcome to the forum, first of all I would not be happy with the compressions on pots 2 and 4, they are a bit low. How did you do the compression test? are the second figures after you had squirted a drop of oil down the plug holes? If so I would think its head off time and get the valves sorted out, and measure the play at the top of the piston.
Your P0300 codes are for a cylinder misfire 1 and 3, but if you have swapped the coil packs around then they would have been for 2 and 4, I presume. It seems that both coil packs are faulty and need changing.
With 175,000 miles on the clock, perhaps the engine is getting a bit tired and needs pulling down and a set of new rings and the head done, and it may then last another 175,000 miles.

Steve

 

[LasVegas]

So an update.

When I swapped the coil packs it triggered more Check Engine codes. My guess was the coils were bad. I bought two new coil packs from Autohausaz, installed them and my C230 is running well again. Problem solved.

Thanks for everyone that responded

 

[toolman1954]

Hi,
Thanks for coming back and reporting on your positive outcome.

Steve.