Took car out today engine light was not on coming home went up hill engine light blinking on an off went out they check code can back code 302 misfire cylinder two do you think that could be coil packs or dirt in the injector ? I have put new plugs in and new wires in and cleaner for injector in gas tank
Error Code: P0302
Description:
Cylinder 2 - Misfire Detected
Possible Causes:
-Wiring, Loose Connectors, Corrosion.
-Ignition system (Spark plug gaps too wide, weak coils, spark plug wires)
-Fuel injectors.
-Fuel pressure too high (38-44psi). Stuck closed regulating valve.
-EVAP canister purge valve.
-Evaporative emission system.
-Low compression.
-Base engine problems.
-Engine control module (ECM).
Additional Notes:
This feature search for engine misfire in a specific cylinder. Most of the time the cause for a misfire is a lack of combustion in a cylinder due to absence of spark, poor fuel metering, or poor compression.
It is very possible that you got a bad plug wire check and make sure the plug wire is seating right and staying in place
SOURCE: Check engine light on
There are three kinds of gasoline engine misfire scenarios, first there is the "under load" misfire and there is the "at engine idle" misfire, and finally there is misfire continuously. All engine misfires exist because one of three things has occurred. First, a cylinder has lost compression, a cylinder needs a certain amount of compression to operate correctly. Second, the ignition system has failed or is failing intermittently, spark is needed at the time of compression to ignite the fuel air mixture. Third, the fuel air mixture is incorrect, proper mixture is needed for the ignition system to ignite fuel properly. If any of these conditions occur in the engine, the engine will misfire.
1. Low or no compression can be caused by
a. burned or leaking intake or exhaust valves
b. worn or broken piston or piston rings
c. worn out camshaft
d. wrong weight motor oil was installed holding the cam followers from adjusting
e. broken valve spring
f. failed head gasket.
2. Ignition system has failed or is failing
a. spark plug has fouled or is worn out
b. ignition coil
has failed
c. spark plug wires have shorted
e. engine control module coil driver has failed
3. Fuel/Air Mixture is incorrect
a. vacuum leak at the intake manifold
b. fuel injector has failed
c. EGR valve is stuck open
d. mass air flow sensor has failed
e. oxygen sensor has failed
f. air intake boot is cracked
common problems:
1. fuel injector has failed or is failing
2. spark plug wire has shorted
3. spark plug is worn out or is cracked
4. ignition coil has failed is failing
Testing a coil on the car is pretty easy. No special tools are required. Just remember to be careful, the amount of electricity generated by your ignition system can be dangerous.
If your coil is already off the car, or if you would like a more specific data-driven test, you can bench test your coil. To set up the test, remove one spark plug wire from its plug, then remove the spark plug using a spark plug socket. Next put the spark plug back into the spark plug wire. Be careful not to let anything drop into the empty spark plug hole -- very bad.
SOURCE: 99 toyota check eng.lt on code po300,po303,po305,po171,p0420
Hey Dan, It cannot hurt to change the Plugs and wires. Make sure and Check all the Fuses and Relays also. Sometimes the Realays can blow or just get old and send a Code also.
SOURCE: 99 Toyota Corolla multiple misfire problem
This is what you need to do, change the plug wires, because if there is a bad wire you would definitely experiences sputter or a stutter, so do the plug wires and at the same time do the spark plugs, this should take care of your problem. if not let me know and i will give you the next step
Testimonial: "So far the car is working fine after I replaced the spark plugs and wires! Thanks so much!"
SOURCE: Have a 1999 Toyota Tacoma with a 3.4. Vehiclw was
Most likely I a would suspect the fuel rail had moisture in it. If you checked emissions it would most likely show no HC and alot of 02 and no CO. If it does show alot of HC then I would suspect sticking valves intermittantly . The pinging really points to no fuel issue tho. If you pull the injector connector off and no change then I would remove the fuel rail and inspect. Also make sure the wires are in the correct locations. It easy to get them wrong.
SOURCE: toyota 4 runner 1998, recurring
Hi! Pretty much a PCM (powertrain control module) problem. The PCM has connectivity on all electrical current that runs inside the car including the engine, transmission, accessories, etc. If the PCM is faulty something will surely fail, one good example is the bad reading on the scanner. Please try to swap PCM and see how it goes. Hope this helps and thank you for using FixYa!
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Remember a flashing CEL indicates a more serious DTC than steady on
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