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The amount of kms driven without cel was under 6km, i did pull the charcoal canister off and it was fine just alot of road filth, the vent valve attached to it you can blow through unrestricted but i...

Egr stainless steel line is kinked at intake manifold and the flange bolts both are tight, the pipe has play at the manifold where it sits down into it.

And I'm worried that if i change the ckp sensor i will need to get a ckp variation relearn done for it to work right, neither chev dealers down here understand what i mean when i ask about it...

Jb fraser thanks for the response, i have noticed these past 2 days that when it runs at cold start the misfire is only the flashing cel, when its at full temperature the misfire is physically...

If i had a way to post videos or pictures of everything I'm running into then it would be easier to explain what I'm talking about.

I'm starting to lean back towards vacuum leak at the manifold, its dry in my garage and when i start and let car warm up and reach misfire, i shut it off, and the bottom bolts of intake manifold are...

I'm also wondering that if I change out the ckp sensor will i have to do a case relearn?

Evap checked out fine, this all brings me back to the ckp sensor, when the car is at full temperature the ckp resistance measured at 2k ohms reads .660 but bounces up as far as .835/.880, and where i...

Ok so now I'm confused yet again, when its low in fuel there is no misfiring, as soon as i fueled up earlier this evening, turned on key, started up, immediately there was the misfire, I'm pulling...

I'm hoping for no more p0300 code, but on that note, when the car is below 1/4 tank close to 1/8 or empty there is no code, but when i fill up it comes back.

Also by putting the upstream o2 in place of the downstream o2 got rid of the p0141 code.

Factory muffler but looks newer, same as the first resonator after the cat its the newest exhaust piece on the whole car "bosal"

On top of this all the snow we got in the past week caused a broken exhaust at the muffler lol

Results from today include, the downstream o2 sensor is and was shot, put upstream o2 in place of downstream and blocked off upstream(i know stupid idea) only due to being end of the day, took for a...

K 53 is 01.0-01.9ohms
K 36 is 01.9-02.1ohms
M 2 is 01.3-01.5ohms

Doing that o2 wiring test from plug to ecu, tested voltage on all wires first and there is voltage readings on all wires, tested the dark green wire for resistance and on 200 setting for ohms it...

I pulled the cat, its actually fairly new and clear, next is o2 sensors

It is running rich, plugs burning black and all, with the timing being off in the beginning the plugs all burnt whit which caused the same misfire and it had a very noticeable performance issue, but...

There is no noticeable performance change other than higher fuel consumption, and the lt and st fuel trims when it goes into ol_fault both drop to 0.0, and yes i would like to test that connector to...

I haven't been trying to sound ignorant or rude, when the misfire starts there is no fuel trim readings period both st and lt go to 0.0 and i was also told to try swapping the upstream and downstream...

The p0141 code has to do with the o2 heater circuit, and the car has all kinds of power, so would that still warrant a plugged or semi plugged cat?

My question is still on going, it's not internal, the fuel system goes into ol_fault and fuel trims go to 0, the cel flashes and throws p0300 and p0141 both as stored and pending codes, if everything...

Now with the engine running the voltage on both signal and live does not change from the 2.53v

Alright, it is completely air tight, cylinder leak down test held at 55psi, fuel pressure is 48 at prime and 54 when idling, pcv valve has been changed and it no longer has a vacuum leak, i just...

When i run my obd2 reader it shows under pending codes unless being driven a p0300 code, when driven the cel flashes and it goes in ol_fault because of the p0300 code, now i believe it has something...