96 Tacoma 3.4 ignition and code question.

4x4Wire Trail Talk Forums: Jeep, Toyota, Mitsubishi, Pajero, Isuzu, Kia, 4WD, 4x4, SUV, Off-Road and OutdoorWire Forums

Print Thread

Rate Thread

96 Tacoma 3.4 ignition and code question. #787470 02/08/07 01:46 AM

Anonymous

Unregistered

My 96 3.4 tacoma chk eng. lite came on with a code of P0302= misfire #2 cyl. I have checked plugs and wire (NEW Bosch.) but still runs like a fouled plug. Has anyone had this problem and or its resolve under their belts? I read on another site that some people have had the same symptom because they had installed platinum plugs. (Which I have). They prefer factory. Anyone here feel the same? What do I do next? Advise? Thanks. "S"

Re: 96 Tacoma 3.4 ignition and code question. #787471 02/08/07 04:12 AM

Joined: Aug 2003

Posts: 712

Waskom, Texas

john_luttrell Offline

Rock Warrior

Run OEM spec plugs only in these trucks. The ignition system was designed to run on a specific spark plug. I would change the spark plugs and do a compression test while I had the plugs out. If it still has a miss on that cylinder with the correct spark plugs installed and the compression was good in that cylinder, you have a bad coil for that cylinder.

John Luttrell
2001 4x4 short cab, 3 inch lift with 33 inch mudders and Powertrax no-slip in the rear

1991 Jeep YJ, 4 inch suspension lift on 33" BFG's

Re: 96 Tacoma 3.4 ignition and code question. #787472 02/08/07 05:31 AM

Joined: Aug 2005

Posts: 273

Costa Mesa, CA

BIGBURLYNAKEDMAN Offline

Mudrunner

Not that it would cause fouling in one of your cylinders (at least in my opinion), I've heard nasty things about Bosch plugs. I have also heard from several different sources that the stock plugs (dual-ground NGKs or DENSOs?) will perform much better than any Bosch plugs will; even in supercharged or heavily-modified engines. As for the OBD code troubleshooting, I agree with John. Plus, compression tests are really easy. <img src="/forums/images/graemlins/kewl.gif" alt="" />

'99 Tacoma Xtra cab V6 TRD
TRD Supercharged, URD 7th injector and 2.2" pulley, 32X11.5 BFG All-Terrains, OME 881 3-inch lift/Toytec AAL, 5100 Series Bilsteins all around, and ProComp 130 lights.
No I'm not some creepy naked guy...

Re: 96 Tacoma 3.4 ignition and code question. #787473 02/08/07 08:05 AM

Joined: Jan 2004

Posts: 217

Sunny SoCal

humanoid

Wheeler

Ditch those Bosch plugs and get some OEM Denso/NGK plugs. Our Tacos don't agree with those POS Bosch plugs.

Re: 96 Tacoma 3.4 ignition and code question. [Re: humanoid] #787474 02/09/07 06:55 AM

Joined: Oct 2002

Posts: 15,887

Fairbanks, Alaska

kewlynx

Toyota & Classifieds Moderator

The Bosch's are in a higher heat range, is why.

http://www.walkablecommunities.org/

Democracy is two wolves and a lamb voting on what to have for dinner. Liberty is a well-armed lamb contesting the vote.

**ubi apis- ibi salus**

Re: 96 Tacoma 3.4 ignition and code question. #787475 02/09/07 07:34 PM

Joined: Apr 2004

Posts: 402

Holland, MI

averkam

Mudrunner

I has CEL for misfire on #1. I changed out the plugs (they were far from new) and that fixed my problem. Different engine but similar PCM programing and logic.

NGK all the way!

On a car that I owned a few years back the PO had installed Bosch Platum plugs not long before I bought it (he was a friend). I kept running into a dead miss from time to time. What the heck. It got more frequent and more frequent. Turns out the problem was the spark plug had seperated inside and eventually the electrode fell off.

2000 Ext Cab SR5 4WD 2.7L 5-speed.

Moderated by 4x4Wire, Dandeman, kewlynx

Hop To

4x4Wire Social: