Misfire after changing spark plugs! :(

Maybe...

Bumped a plug when putting it in, disturbing the gap?
Got anti-sieze or other contaminant on the insulator?
Used a metal gapping tool on iridium plugs (a no-no)?
Insulator cracked when you torqued it? (it happens)
Didn't get a coil connector completely on at reassembly?
Contaminated the coil connector contacts?
Were give and used wrong plugs?
Contaminated the MAF when you cleaned it?

Is the ECU throwing a code?

In my experience, vacuum leaks show up with rough idle.

All I can think of right now and it's probably none of them, but someplace seemingly unrelated to where you worked.

Good luck.

 

Basically, it starts to shake really bad and I can hear the engine having a bit of a hard time, but when I accelerate, the problem totally goes away.

 

haha i was just spewing ideas didn't even realize there was no dist!!

 

X2!

I would also suspect that you pulled a plug wire apart at the boot or cracked a white plug insulator when installing.

Once you accelerate and volt soak the coil, it has enough constant juice to jump the broken/wide gap, wherever that might be.

You can fire it up and clamp a timing light on each individual wire for a quick check.

 

This would work if the Tacoma had a distributor and wires, but it uses individual coil packs on each plug.

I would suspect a bad plug, champions are really not the right choice for this truck, I wouldn't use a champion plug in any engine but that's really just my preference. go with denso or NGK.

 

I ended up changing my oil, diff fluid, and tranny fluid and it stopped. I have no idea what the problem is.

 

Exact same thing happened to me. Heres what I did and it worked. Start by pulling one coil pac harness off at a time while the engine is running. My luck it was the first one that I changed the plug on. The engine did NOT slow down. Next I inspected the wires.....Good, then I pulled the coil pac and pulled the new Plug.. Bingo! When the plug fell out of the socket it hit the edge of the cylinder head and closed the gap to zero! I regapped the plug to .041 and she runs like a beotch! Good luck

 

By pulling the coil pack out while engine is running, couldn't you run the risk of getting severly shocked?

Thanks.

 

http://www.google.com/products/cata...Y_6sAPDxO2FDA&ved=0CEIQ8wIwAg&biw=974&bih=571#

 

I have exact same issue. And NO codes. When you give it a little gas uphill it kinda shutters but then you put your foot to it plenty of power and great acceration. Hope changing my oil works. If not guess I’ll start pulling plugs.

 

I don't know what it is, but I know for a fact it isn't the oil causing your problem.

 

Your issue is the plug you used, get denso or ngk plugs only. Nothing else

 

This thread is from 2011 LOL

 

Did you crack a plug going back in?

 

^ this. Or did you drop one? It's possible that even the parts store dropped one and cracked the porcelain and that plug will miss fire ever so slightly

 

This happened to me with a Toyota Avalon.

 

Believe it or not when I change my plugs I always do one side,then I start the truck too make sure everything is working properly on that side,before doing the other side.

Thats a sure sign one of the wires is either crossed/damaged/or not plugged all the way in properly.