Code P0300?
#2
CF Senior Member
Join Date: Aug 2011
Location: Slidell, Louisiana
Posts: 343
Likes: 0
Received 0 Likes
on
0 Posts
the code is a random misfire could be bad plugs, wires, vacuum leak, PCM. It can many things because multiple things can cause a misfire. Tell us the year and size motor and maybe a description, does it come and go or stay, is your truck running really rough, or anything else that can help us figure it out.
#4
my 05 with a 4.8 same motor just different pistons,crank and rods has the same problem, i do not get a check engine light but when i tried to get a inspection it has this code, i also would get a pop thru the intake when taking off sometimes. i changed the intake gasket,this helped the intake leak.there are 2 different gsts i bought the most expensive one,i changed plugs and wires but still have random misfire.do not know where to look next
Thread
Thread Starter
Forum
Replies
Last Post
advanceauto
Express & G-Series Vans
3
February 27th, 2010 9:51 AM
tat2dup81
Silverado & Fullsize Pick-ups
0
September 28th, 2009 6:16 PM
warrennaujalis
New Member Welcome Area
0
October 28th, 2006 10:24 AM