Question about 1995 Toyota Tacoma

1 Answer

My 1995 Tacoma with a 3.4 v6 has been running very rough and has no power. I have replaced plugs, plug wires, O2 sensors, MAF sensor, and changed the fuel. I get a misfire code on cylinders 2,4,6. I pulled off the plenum and the intakes to cylinders 2,4,and 6 are clean. The intakes to 1,3, and 5 are very dirty. What would cause one bank to differ so much from the other?

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • Toyota Master
  • 33,344 Answers

I would consider checking all the vacuum lines under your hood. if all else fails go join www.tacomaworld.com awesome message boards there for tacos. tell em fixer sent ya

Posted on Sep 09, 2017

Ad

6 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad

Anonymous

  • 178 Answers

SOURCE: maf?/ missfiring

have the map sensor checked to see if it is within range you say you have codes maf make sure all clamped duct work is tight and not loose clamps .iac motor clean bore if the pintle gets stuck will cause rough idle hesitation even no start conditions scan tools only test the idle air control valve motor not the bore that extends to block varnish gets built up on the pintle and in the bore wich binds the in and out operation

Posted on Sep 12, 2008

Toyota Ed

  • 1861 Answers

SOURCE: 5vz-fe misfire codes

Replace the coil pack.

Posted on Dec 26, 2008

Toyota Ed

  • 1861 Answers

SOURCE: the 4runner is throwing 3

Replace the coil pack..

Posted on Dec 26, 2008

Anonymous

  • 1 Answer

SOURCE: 99 4runner 5vz-fe 3.4 misfire

I know this post is old, but right on the engine theres a sticker that says use multi-ground plugs only. I read a similar problem like yours and it seemed to turn out that the spark was arcing to ground over the ceramic on the plug. So maybe it could have something to do with the single ground plugs.

Posted on Jan 23, 2009

Teddi B

  • 232 Answers

SOURCE: Tacoma 4cyl idles rough, heditates, multiple misfires

Possible fuel delivery problem, fuel pump, fuel line, clogged fuel filter, leaking injectors or injector O-rings, faulty pressure regulator etc. Check your fuel pressure.

Posted on Jun 20, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I change both o2 sensor but the code is still coming on the wires ok what can be the problem


Usually an O2 sensor code is a result of another problem. Your problem is coming from the motor & the sensors are just reading it. Bad wires,coils, plus, vacuum leaks even low coolant or running hot will give you O2 sensor codes. Sounds likes you should start on wires themselves. Is it running rough? Missing? Check the plug wires & coils first. Disconnect the batt to clear the codes & take it from there. Good Luck

Sep 23, 2015 | 2002 Toyota Tacoma

2 Answers

Just replaced MAF sensor with full tune up, but now idles rough..


replace the IAC, idle air control valve at throttle body. replace fuel fiter, put drygas in tank, todays fuel w/ethenol is bad news for older vehicles.

Jan 03, 2013 | 2000 Toyota Tacoma PreRunner

1 Answer

Diagnosed with ignition coil problem, replaced coil, spark plugs & wires, inspected pcm, vehicle running rough in gear, acceleration is rough, smooths out when it gets going. oil on one spark plug....


2006 3.9 has to be a T-Bird or LS

There are no spark plug wires

It has Coil-On-Plug individual coils

Plugs don't fail --they get changed at 60,000 miles
give or take,say every 3 years

The front (2) O2 Sensors get repalced at 100,000
miles. The ones closest to the engine

Clean MAF Sensor at least once a year

I have no idea how you inspect a pcm,if your
at home & have no scanner or PC Based Software

Egr Valves fail early on those & other fords

You could test,not look at,actually put an oscilloscope
on the TPS Sensor

Any oil on a spark plug requires a new valve cover gasket

If a coil was replaced based on a code alone,you may have
replaced a good one,not what needed to be replaced if any

Jul 13, 2011 | Ford Freestar Cars & Trucks

1 Answer

I'm getting codes with obd II read for o2 sensor 1 bank 1 and sensor 1 bank 2 i have a rough running 2004 ford escape 3.0 V6


If the O2 Sensors are original,you could just change the front 2

The ones closest to the engine.

Any other issue you need to actually diagnose, as codes
are for just that reason

They don't ever tell you to replace anything

Running rough is more the O2 Sensors

Plugs
MAF Dirty
Vacuum Leaks
Ignition Coils going bad

May 31, 2011 | Ford Escape Cars & Trucks

2 Answers

How do i fix my 2001 cadillac catera idle problem. ive tried fuel injector cleaner, changed the spark plugs, and o2 sensors, but it still idles rough and im throwing these codes. bad o2 sensor bank 1...


The problems you are describing indicate to me that you likely need to replace the coil pack that runs from the spark plugs ,and the plug wires end up at it.It also may be the spark plug wires,get a water bottle and spray the wires after dark and if you get a light show from them then replace them,if not,replace the coil pack.

Jul 15, 2010 | 2001 Cadillac Catera

1 Answer

2001 Tacoma running rich but the scanner is reading a lean code


No, disconnecting the sensor and seeing no change would be a indication the maf was bad. Your computer takes information from your mass air flow sensor (maf), o2 sensor, cam position, and knock sensor to regulate the correct mixture. I would suspect a bad o2 sensor upstream. Try taking off the o2 sensor and seeing if there is black carbon on the base of the o2 sensor. If it has black carbon on the base it could be a bad o2 sensor. This problem could also be easily solved by hooking up a mechanics diagnostic computer to pin point the problem. Sometimes, you can clean the mass air flow with a special cleaner to help it generate a more accurate reading.

Apr 20, 2010 | 2001 Toyota Tacoma

2 Answers

Rough idle after initial startup.


Really the sky is the limit here. See when you first start vehicle the computer is in open loop which means it is not monitoring the O2 sensors and fuel control is set to a calibrated setting. After the Heaters heat up the O2 sensors it then goes into closed loop and starts monitoring the O2 sensors to control air/fuel. So anything in the fuel and air mix could be causing your problem like false air volume reporting from the MAF sensor,a vacuum leak,unmeasured air getting into the engine behind the MAF sensor from a leaking hose,,a faulty pcv system,lazy O2 sensors, etc.
I would first recommend cleaning the MAF sensor and resetting the keep alive memory.Get a T20 torx bit and remove the MAF and get some electrical cleaner and spray the MAF bulbs clean then let it air dry or blow it dry with light shop air. Then disconnect battery for about 30 minutes to reset the strategies and see if this cures your problem. It will take probably 50 miles of driving for the strategies to reset.

Apr 15, 2009 | Lincoln Town Car Cars & Trucks

1 Answer

92 Buick Le Sabre engine stumbling/hesitation


Have you checked fuel pressure? How about spark on all 6 cylinders? Maybe a coil?

Apr 12, 2009 | 1992 Buick LeSabre

1 Answer

Rough start on 2001 escape


how about a simple tune-up?  Plugs and filters.

Mar 28, 2009 | 2001 Ford Escape

Not finding what you are looking for?
1995 Toyota Tacoma Logo

Related Topics:

96 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toyota Experts

Marvin
Marvin

Level 3 Expert

85206 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22484 Answers

Jonah Oneal

Level 3 Expert

14092 Answers

Are you a Toyota Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...