At Fixya.com, our trusted experts are meticulously vetted and possess extensive experience in their respective fields. Backed by a community of knowledgeable professionals, our platform ensures that the solutions provided are thoroughly researched and validated.
Re: Random missfire. all the time. when driving on...
Most likely to check the distributor cap and rotor. Pins can corrode pretty bad (greenish dust). If ok check the intake manifold gaskets for signs of coolant where they meet the cylinder head.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
? 2:56
https://www.youtube.com/watch?v=OyvdWeyDHf4
Feb 5, 2010 - Uploaded by Scotty Kilmer
Scotty Kilmer, mechanic for the last 46 years and counting, shows how to fix your car if the check engine light ...
The misfire detection monitor, a software strategy built into the computer, is designed to detect an engine misfire. The computer can also normally identify the ...
If the problem isn't fixed the error code will keep returning. You'll need to get the ignition system checked from the spark plugs back over, (plug leads, ignition coil, etc). The injectors might need checking as well.
2002 Envoy sle 4.2 L straight 6. Random misfire(PO300). After erasing codes for several days, I finally took my car on the highway and ran it at high speed(70+) for about 4 to 5 miles. Check engine light came on as before but this time it gave me(PO305). Random misfire cylinder 5. So I switched coil 5 with coil 2. Went back out on the highway and repeated as before. This time it gave me(PO302). This was telling me I had a bad coil. Replacing one coil pack solved the problem. The professionals told me low fuel pressure would not give me random misfire, but rather a O2 code because the engine is running lean. Thank you------------------------------------ thank you very much.
the flashing light is telling you the engine is miss firing, not that there is fuel in the exhust a miss fire is the only thing that will cause the light o flash the P0300 is a random misfire so i cant tell you witch cylinder but replace the coils that should take care of it....good luck
These are misfire codes.This means that your vehicle is missing.The 300 is a random misfire and the 305 is for cylinder 5,and the 306 is for cylinder number 6.Check the plugs if they are good then you could have bad coils.They are top of the plugs.Hope this helps.Good luck.
that's a multiple cylinder missfire code(random). Has it been a bit shaky recently? if you haven't performed a tune up recently, it's time to do so. replace plugs, wires, and in some cases, the distributor cap and rotor if equipped.
PO229 indicates tps circut inttermitent.
Po300 303 and 304 indicate missfires on cyl 3 and 4.. Was the fuel filter primed before starting the engine? If not ,remove and reinstall filter. Then prime filter with pump that is on fuel filter adapter. Once this is done restart and verify o/k
Code p0300 is the code for "random missfire detected". The "check engine" light is flashing to warn you that severe damage is being done to the catalytic converter.(very expensive)..
×