random misfire p0300
 

I have a chrysler 300 in my shop it has a p0300 code in it . So far we replaced egr valve and tube intake gaskets , plugs and coils ect sensor 5 motor vacs due to heavy sludge build up, cleaned throttle plate it only runs rough at idle . In closed loop

on your scanner which cyls are missing and how bad what engine size and year is this

Plus at your shop? u dont have a ASE master tech there?

I seem to remember a TSB for this.....

Rotating the valves, combustion chamber cleaner, and beating the snot out of it...?????

But I cant seem to find it.....

p0300 on a 2005 chrysler 300
 

i did a combustion cleaner no there is no master tec here its a multiple cyl misfire the car just shakes at idle mil flashes then pops on can i drill a small hole in throttle plate cuz as soon as u raise idle a bit it smooths out

u do what u want to your cust car and hope it does not backfire in your face.

what kinda advise is that kevin ive tried everything under the sun valve cleaning 5 motor vacs egr valve andtube plugs all coils intake gaskets temp sensor o2 sensors even had it at the dealer and besides the hole can be covered up with a dab of jb weld or silicone if i do it this is a used car shop and the car was here when i got this job the hole would be in front of map-maf sensor so it wont get detected by ecm im no retardt been in the business for 20 years my boss dont wanna put any more cash in to this piece of junk i was looking for an answer not a sarcastic comment so if u can help fine i have no problem payin fees so if u feel u can help please do so thanks

do u not have a good enough scanner to tell which one is missing and how bad it is missing? what year 300 as for hack jobs I cant and wont help with any of that BS that's why I said u do what u want in that regards I want no part of it.

What biz have u been in for 20 years?