Shanr

Have been getting misfires on cylinder 1,2 and 3, this occured 1 second after i floored it, a friend who owns an exact same car as me with the same milleage had his cats fail For him, so we asumed that was the issue, we removed both primary cats and it still missfires, could the secondary cats create this problem aswell? Im drivning the car every now and then to hopefully get a New code, but nothing! Allthough now i cant rev over 2,5k without it misfiring, and after the misfires theres a hade idle, IF i restart it its to normal, and IF i rev it while in neutral it spins like it should?! Pls help, every answer is appreciated

Oshkoshbigjosh

Could be a coil, wires, or sensor. I got misfires in cyclinder 1 and 5 for some reason and I haven't been to my mechanic yet but I'm sure it's the coils. I also get a rough idle. Let me know what you come up with

Lenin

Shanr, what year is your car? If its 2002, this could be the cam on the passenger side. Clear the codes and see if they come back. Hopefully its just the injectors or something electrical related to ignition.

Shanr

yes my c32 is a 2002, have cleared the cider multiple Times to see if anything New pops up, but so far Nothing, isnt the cams worst case scenario?

Lenin

When you say "cleared the codes multiple times to see if anything new pops up, but so far nothing" do you mean that the codes are not going away? And yes, the cams are the worst possible case. You already ruled out the primary cats.

Shanr

when i clear the codes the engine light goes off, IF i then start the car and drive it, it drives on all 6 cylinders, until i rev it to 2,5-3k or IF the compressor starts to whine = more airflow, therefore i thought it might be the cats who is clogged and making the misfires, the primary cats Where bad so i cleared those anyways, i have nice idle IF i restart the car after the engine light comes on = limp mode activates, it only idles like **** IF i drive the car till it misfires, rebot the car and it is back to normal

Lenin

When the CEL comes back, do you know if it is again all three cyls on the passenger side? From what you are describing, this doesn't sound good. Sounds more and more like the cam issue.

Shanr

IF it Where the CAMs wouldnt it be idling and running badly all the time? IF you hade a Broken camshaft the engine Would run bad all the time? I get it to drive nicely, like a normal car IF i dont rev it, sounds to me like some air issue somewhere

Lenin

Shanr, it's hard to help you since you are not answering my questions. When the CEL comes back, what codes do you get? i hope its not the cam but it does sound like it is. Good luck.

Shanr

i get the exact same codes everytime, misfire cylinder 1,2 and 3, and i think, Im not sure thought, but IF 1 cylinder misfires enough, doesnt limp mode activate so the entire bank misfires? I am going to leave it to a dealer ship next week to change plugs, check wires etc, just to remove all the cheap and possible problems

Morphh

Check the hoses cmg off valve covers pvc
they disentegrate from inside out and cause a misfire, cause they leak air. They connect underneath throttle body
p0410 is secondary air pump is gong, change relay and pump

insame1

PLEASE don't let the dealer do your spark plugs. they quoted me $1600 for plugs and wires on my c55 and I bought the same parts and installed them for $375.

Lenin

It can be the hoses that Morphh had mentioned. Also check the air filter on the passenger side and may be swap it with the filter on the driver side. The key is that it is the entire bank that is misfiring.

Shanr

seems like you are on to something that could explain My problems with the car! What does the words "cmg" "pvc" and "gong" mean? Thanks For your tip!

Shanr

its a living hell changing the plugs without the correct tools ive heard from a friend at works who owns an exact same car, Leaving it to a dealership where i know the guy who owns it, have already bought plugs, Im going to send the car next week to the mechanic When Im off from work!

Shanr

a couple of days after the car broke i checked the airintakes, filters etc and changed to New k&n filters on both sides! IF Anyone knows, could the valve cover gasket be the reason to My car problems?

insame1

Good on ya. Just FYI it took me about an hour with a standard tools.

Slide

Did this get figured out? My 2003 C32 is suffering from the same symptoms and codes. Drives fine unless I push the throttle a little too far. Then the passenger side bank misfires, starting with cylinder #2. Shut the car off and restart, drives decent, but not as smooth an idle as normal. First problem code I ever had with the car just before this started was a bad o2 sensor on the passenger side. Replaced it, and about a week or two later this misfire code issue started. Hopefully Shanr will respond and let us know what he found out.

insame1

If you do the valve cover gaskets at the same time as the plugs it's way easier.

Pansu

Valve cover gaskets dont cure misfire

insame1

Agreed but, if you need to do them and you are also needing to do plugs it is best to do them at the same time.

Gramma_Benz

Had the same problem, it was my cams.

C3Duece

Shanr -
How many miles are on your car and is it modded at all?

PJmak

Until they leak so bad and the oil goes down to the plugs

c32jet

How did you ultimately figure out it was the cam(s). I have same issues described here - my car is 2002 C32 - 140K miles.
When I punch it - the CEL will blink - it will instantly run pretty shaggy till I pull over, turn it off, then back on again. I have 8 codes - P0303 / P0302 / P0300 / P0422 / P0300 / P0301 / P0300 / P0302. It had what I would call a 'bobble' at stop lights that has been annoying. Would shake the car at the light... otherwise runs pretty good. I experienced the blinking CEL and shaggy run a few weeks back on what I would call 'mild accelleration' not WOT - just a little kick to pass another car. I am able to make it go shaggy and blink CEL at will with WOT.

New plugs and new wires seem to have gotten rid of the 'bobble'. Going now to clear all the codes and see what pops up if anything. I have had the misfire codes for some time now.
I also am wondering if CATs or CAMs or maybe fixed it with new plug wires (a week ago - not driven it much since).

More info..
4 Codes / 8 Codes? What does the READY mean?

This morning I took it out after the above post... not so sure my 'bobble' is gone... seems better but... I cleared the 8 codes from above.
Here is what I got after two runs on the freeway - the first was good and solid - the second popped the Blinking CEL and then went to a solid CEL. It did not go instantly shaggy requiring me to pull over. I was close to home and seemed to run fine. Got back and these are the codes now. I just cleared the codes before I took it out.

Also... could any of this be caused by an intercooler leak? It used to have the occasional drink of coolant. Now I have not added coolant in probably a year or two.

Thanks for the help.