Question about Cars & Trucks
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
New users get to try the service completely Free afterwhich it costs $6 per call and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
SOURCE: #4 CYLINDER MISFIRE
Hi the most likely fault would probably be head gasket, it maywell show no other signs of fault as it can blow into next cylinder.
Have a compression test carryed out and all 8 cylinders should be within 10% of each other.
Posted on Feb 08, 2009
First see what #2 spark plug looks like, probably time for a tune up. A compression test will verify engine is in good mechanical condition. Also check the 3 peice intake manifold for leaks - this is common, but ususally the miss smoothes out off idle if this is the case.
Posted on Jun 28, 2009
SOURCE: Check engine light
A multi misfire may mean that one or more of the following has happened:
Faulty spark plug or wires, Faulty coil (pack), Faulty oxygen sensor(s), Faulty fuel injector(s), Stuck/blocked EGR valve / passages, Faulty camshaft position sensor, Defective computer.
The engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wire, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the the problems were faulty fuel injectors.
Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.
Good luck and hope this information helps, keep me posted, be glad to help you get the truck running 100% again. Not sure if your running a K&N air filter, and if you are there may be a flim of oil on the MAF sensor that is making you run lean. You may want to spray down the MAF sensor with a can of MAF cleaner.
Posted on Jul 02, 2009
My car was misfiring also. My mechanic reccomended using a few bottles of techron fuel injector cleaner, as my car was used alot previously for city driving. Over time, if it is not opened up and run good and hard at speed on the highway, they become clogged and it will misfire. I spent 30 bucks on two bottles, used it on two tanks, and all the hesitation and lights have gone away! It was awesome, hard tyo fiund a good honest mecghanic who will reccomend a 30 dollar fix that isnt even done by them, rather than a few hundred dollars worth of repairs that wont solve your problem.
Posted on Aug 10, 2009
P0303 Cylinder 3 mis-fire Possible causes misfire does not return,defective Camshaft Position (cmp)or CKP sensor,vacuum leak,defective ignition system.
Posted on Dec 12, 2009
Tips for a great answer:
Dec 31, 2016 | Cars & Trucks
Sep 19, 2014 | 1999 Toyota Corolla
Dec 12, 2011 | 1995 Nissan Maxima
Mar 22, 2011 | Honda Accord Cars & Trucks
Jan 02, 2011 | 1998 Ford Explorer
Jun 21, 2010 | 2007 Hyundai Sonata Limited Sedan
Jan 15, 2010 | 2002 Kia Sportage
Nov 13, 2009 | 2001 Mazda MPV
Jun 30, 2009 | 2003 Nissan Altima
14 people viewed this question
Usually answered in minutes!