Miss fire when cold stops as motor warms code po301

SOURCE: 1995 Toyota camry Le 4C Missing Problem -

i have came across simler problems in the past so im going to give you a list of four main suspects number 1; a broken or pereshed vacuum hose at the trottle body or inlet manifold.2 a blocked injector 3 a fuel injection system fault 4 a disconnected /leaking or perished crankcase ventilation hose.Before you try any of these by a can of fuel cleaner and run it through your system remember a small piece of dirt half the size of grain of salt is enough to cause this problem good luck.adrian

Dar

• 2007 Answers
• Posted on Jun 05, 2009

SOURCE: 1994 Toyota Truck Hilux I did a tune up plugs

If it just started this after the tune up, you probably have a faulty spark plug.

SOURCE: engine check light& error code p0301 on my 2003 rav 4,

Unless your computer in your car is faulty... the check engine light came on because it, or one of your vehicle's many sensors detected something within your vehicle was not operating under preset factory conditions. Fortunately, the error code that was extracted was indeed a cylinder # 1 misfire, which is fairly basic. Could be a bad spark plug, wire, etc. or you may have gotten some condensation inside the plug boot. Your mechanic did indeed clear the code, but drive it for awhile and see if it repeats. Normally with a cylinder misfire, you'll notice a small stutter when you accelerate or idle. If your Check Engine light returns, have the codes extracted once more. If the same cylinder is misfiring, have him replace the spark plug and wires.

SOURCE: 22RE no power. 240K on body Rebuilt motor w/ 1k on it.

check to see if plug wires are cracked or burnt threw from laying on exhaust manifold

SOURCE: 2001 Toyota Tacoma Engine Miss

Start with the plug wires.You may need new plugs but my experiance is that the plug wires are the first to go.