e24kgold

So over the past few weeks my 2005 c230k m271 has be idling rough on cold stard but is fine once you start driving. I was just going to do plugs on the next service. Today I put in a can of techron and ran it hard for a few miles then went and filled up the tank. Drove for a few more miles then I have no power, the engine is missing bit time with a bad shudder. I ran the codes and got 12, cylinder 1,2,3,4 misfire, too lean, evap leak, and bank something or another. I'm guessing the usual suspects of plugs, coil packs, O2 sensor, MAF, anything else i should be looking for? I hope i can drive it to the shop tomorrow.

e24kgold

Anyone?

Johnsct

How many miles? My guess without knowing any details is bad coils.

e24kgold

195,100 mi. What about the $12hose?, I hear a hissing coming from that area. No way all the coils go bad at once right?

LILBENZ230

If that hose recall has never been done that's a prime suspect for sure. Have you installed the cam isolation wires? I ask to rule out oil contamination in the wiring.

e24kgold

I know nothing about the cam isolation wires. Enlighten me please!

Glyn M Ruck

The hose is the most likely.

Please note that Techron does not work instantaneously. It requires as much stop start heat soak type of mileage as possible to work best/most quickly. It will still clean up in open road mileage but takes longer.

e24kgold

I think its the hose too, will I dp any damage if I drive it 12miles to the shop?

Glyn M Ruck

No.

e24kgold

Turns out it was a vacuum line

Glyn M Ruck

That figures. Any air leak will cause the symptoms you describe. The "Hose" is actually a vacuum line.