Question about 2001 Audi A4
P0300 - Combination misfire detected
P0301 - Cyl 1 misfire
P0302 - Cyl 2 misfire
If it has a lot of miles it needs a tune up.
Fill tank with high quality premium fuel
Check fuel pressure
Posted on Sep 30, 2009
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Posted on Jan 02, 2017
its like you have cylnder misfire or more , did you check all the wire .plug if any one bad or the wire have fire , and you check if the fuel pump good . i would like to ask you that , Did the problem come on suddenly or was some previous action or work done......
Posted on Nov 12, 2011
SOURCE: po302 code,po301,po300
usually a p0300 is a random missfire code due to a fuel problem probaly bad gas , use some in tank fuel treatment such as techron or lucas injector cleaner, after adding fuel disconnect negative terminal to batt, to clear codes and see what happens
Posted on Dec 27, 2008
Clean the EGR valve seat. The EGR may have become stuck. A good way to check for vacuum leaks is to use smoke near every intake vacuun hose . And near the intake manifold. The valve will **** in the smoke. If you clean the EGR valve and it still misses. Replace it. The EGR can cause random misfire.
Posted on Jan 06, 2010
Testimonial: "ok ill give that a try i never herd the smoke test before but i like it sounds like it will work"
No its not a very common problem in kia,but this problem is seen in all brand/models of car.The error codes are indicating.Coil pack and spark plug fault.------ There are a lot of causes of engine misfiring, but the most common cause is bad spark plugs or spark plug wires and a worn coil pack. When one of these causes occurs it will affect air/fuel mixture firing inside the engines cylinder.The first thing to do to fix a car with engine misfiring is to replace the spark plug and the spark plug wires, replacing this parts usually fix the problem. However, if engine misfiring remains then the next part to be replace is the coil pack.-------.Also try cleaning the fuel injectors,and spark plug wires.IF the spark plug wires seems wet or moisture got collected on them,Clean then and dry them then recheck.But most probably,the coil pack and spark plug wires needs to be replaced.There are two things one there is misfire and other the codes that are also indicating.So this parts are to be replaced to solve the problem.-----------This should help.Thanks.Helpmech.
Posted on Jan 29, 2011
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