Tacoma 4cyl idles rough, heditates, multiple misfires

Go to auto zone scan the code it is free.

need to find out why the misfire bad coil ,wire ,wrong plug gap etc check injectors and fuel presure --what ever is causing misfire is also probably causing problems with transmission shifting

How to Fix error code P0300 for random misfires on your car ...

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Oct 15, 2010 - How to Fix error code P0300 for random misfires on your car ... amisfire (code P0304) on a 1999 Mercury Villager 3.3L · How to Fix error code P0500 ... I reset my codes and it ran fine for a couple of days, then I started getting ...

(code P0305) on a 1999 Mercury Villager 3.3L - auto repair

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Sep 7, 2010 - The vehicle is a '99 Mercury Village, 3.3L, with 150000 miles on it. The chief ... How to Fix error code P0300 for random misfires on your car ...

2000 Villager Misfire - Car Forums and Automotive Chat ...

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May 24, 2010 - 2000 Villager Misfire Villager Car Forums. ... i was told that the 3.3L engines of 1999-2002 nissan quests/ mercury villagers are INTERFERENCE engines! ... Hope the following may help, and I will post if my last fix works. ... I have a 1999mercury villager that is showing a random multiple cylinder misfire ...

Rough Idle - 2000 Mercury Villager - RepairPal

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Repair the code issue, because your Villager has OBD-II which is a very helpful Diagnostic system. Upvote (4) ... My 1999 Villager was running poorly; rough idle, lack of power at highway speeds and the engine problem light indicated random miss-fire, etc. I had new spark ... Have code po306 cylinder 6 misfire detected.

P0301 - OBD-II Trouble Code - RepairPal

Sounds like it did not go back together right.

have you checked for a vacuum leak?pcv attached,no leaks around plenum,engine coolant temp sensor reading right.

HAVE VECHICLE SCANNED.AT AUTO ZONE THEY WILL DO IT FREE.SOUND LIKE FAULTY TPS SENSOR,FAULTY EGR VALVE OR O2 SENSOR.MANY THINGS WILL CAUSE ROUGH IDLING LEAN MISFIRE CAUSED BY VACUUM LEAK PVC VALVE OR INTAKE.CLOGGED FUEL FILTER,DIRTY FUEL INJECTORS.GETTING CAR SCANNED WILL SAVE YOU TIME AND MONEY.

Perform a valve clearance inspection and adjust if necessary. Tight or sticking valves will cause a misfire or rough running concern. Note: Perform valve adjustment when the engine is stone cold. 4cyl: INT 0.26mm EXH: 0.30mm (V6 engine are hydraulic and no adjust necessary.) Also check for a sticking or stuck open EGR valve. For diagnostic purposes only: Remove the EGR valve. Place a business card over the EGR passage and bolt the EGR valve back on. This plugs the EGR ports and if the misfire goes away the EGR valve is partially stuck open and is defective.
Check for low fuel pressure. Check for low compression. Check cam timing. Check for a weak ignition coil. Also don't over look the possibility of worn or broken engine mounts which cause excessive engine movement and engine vibration. -hope this helps

Have the fault codes pulled with a scanner. also check the ignition wires, you may have a bad one witch causes the misfire. I had same problem on my late 99 Toyota tacoma . auto zone check codes for free.

pulls codes first auto zone checks for free

You have a shorted circuit somewhere. Look at the plug wires for contact with ground.