06 Tacoma Misfires...

a couple days back, i've noticed a series of misfires, and intermitent sputtering. what are the possible causes of this mystery problem?

 

nope, bone stock...

 

okay, its an 06, 4.0l engine, daily driver, most noticable while accelerating...

 

there are no extremes as it relates to temperature. the climate is tropical (jamaican climate)

 

sounds like some old spark plugs

 

could tainted petrol be a factor? noticed this sputtering after a precarious fill up...

 

can't be more than 600 miles or so

 

600 miles? where did you get your plugs? where they gapped properly?

 

gotten from the dealership...

 

work also done by dealers...

 

you might want to have the dealership take a look at spark plugs could have been gapped wrong also you injectors might need to be cleaned

 

okay, its got little under 50 thousand miles on it. and yes, the check engine light has appeared...

 

get the code read and let us know what it says.

 

My car did that when it sucked water in the intake. At least that's what I assume. Only happened when it rained and I drove through even the slightest amount of standing water. I had a short ram intake on it, and could duplicate the symptom when I poured Seafoam cleaner into the intake while the engine was running. I switched back to the stock intake and the problem disappeared. Until my wife went to go to school after it had been very humid for a few days and the car hadn't been driven. She drove to 2 miles or so back, and when I took it back out right after that it ran fine.

So maybe make sure the intake is dry. My CEL came on during that as well. It flashed while the engine was stuttering, and went off when I drove it (and the engine ran fine). It also came on every time before when it stuttered in the rain/standing water. Not sure what the code was though as the light never stayed on long enough to read it.

 

You got an ignition problem. Check the coil pack, plug wires, plug gap. Make sure the plugs are torqued correctly. Make sure there are no hairline cracks in the coil packs. Condensation can collect and cause a misfire. Sounds like the $tealer fucked up your ride dude.