What causes a Toyota random cylinder misfire condition?
Start by checking for intake leaks, intake gaskets are commonly caused of multi-cylinder misfiring. If no leak is found the next step is to replace the spark plugs. If the problem persists more tests needs to be done to diagnose the problem, see “Possible Causes” There is a factory service bulletin for the following Toyota models:
What are the misfire codes on a Toyota OBD II?
P0303 Cylinder #3 Misfire. P0304 Cylinder #4 Misfire. Sometimes, even tho’ your OBD II equipped Toyota is suffering a bona-fide misfire, the PCM doesn’t set/register any misfire codes (no check engine light either). Lack of power upon acceleration.
Where are the misfire codes on my pick up?
The check engine light (CEL) will be on. One or more misfire codes (P0300-P0304) will be stored in your pick up’s PCM memory (PCM = Powertrain Control Module = fuel injection computer). P0300 Random Cylinder Misfire. P0301 Cylinder #1 Misfire. P0302 Cylinder #2 Misfire. P0303 Cylinder #3 Misfire. P0304 Cylinder #4 Misfire.
What causes a misfire code on an engine?
For example, the misfire code could be caused by a bad Coil-on-Plug (COP) ignition coil, or a bad fuel injector, or in one engine cylinder having very low compression, and the list could go on but I think you get the idea.
What to do about a misfire in a Toyota Tundra?
If you have any doubt as to were top dead center is (TDC) pull spark plug #1 and insert a long enough rod down inside and put a dial indicator on top of the rod and measure. You can almost get it perfect with the naked eye. Now looking at your belt, which is 100 times better than mine when I replaced my timing belt.
What causes a P0300 Toyota to misfire?
P0300 TOYOTA Possible Causes Faulty spark plug (s) Faulty ignition coil (s) Clogged or faulty fuel injector (s) Intake air leak Fuel injectors harness is open or shorted Fuel Injectors circuit poor electrical connection Ignition coils harness is open or shorted
What are timing marks on Toyota Tundra 4.7?
Check your timing. Pull the top covers, line the marks up and see if anything is off. There are threads in here to show proper timing marks. On the 4.7l its NOT 0. It’s a lil dowel/tit mark on the bottom cover and the letter T on the top for your cam’s.
What causes a faulty spark plug on a Toyota Prius?
P0300 TOYOTA Possible Causes Faulty spark plug (s) Faulty ignition coil (s) Clogged or faulty fuel injector (s) Intake air leak Fuel injectors harness is open or shorted Fuel Injectors circuit poor electrical connection Ignition coils harness is open or shorted Ignition coils circuit poor electrical connection
What should I do if my spark plug misfire?
Step 9 – A spark plug must be properly gapped with a specific measurement from the electrode, a misadjusted air gap can result in a misfire. Step 10 – Using a proper spark plug with a correct air gap will help ensure operation of the ignition system.