General Maintenance & Repairs Leaks | Squeaks | Clunks | Rattles | Grinds
Sponsored by:
Sponsored by: CARiD

random misfire code

Thread Tools
 
Search this Thread
 
Old Aug 21, 2010 | 11:19 PM
  #1  
02formuladriver's Avatar
Thread Starter
Teching In
 
Joined: Jun 2010
Posts: 16
Likes: 0
From: Hawaii
Question random misfire code

so i have an 02 formula i recently changed out my exhaust manifolds to bbk shorty headers and high flow cats....well had a misfire in the 6th cylinder car was idling rough so i popped off the coil pack cleaned it and runs fine but now its showing that i have a random misfire now anyone might know what it could be (also service engine light flashes)
Reply
Old Aug 21, 2010 | 11:37 PM
  #2  
cherryelky305's Avatar
TECH Resident
iTrader: (2)
 
Joined: Mar 2007
Posts: 751
Likes: 0
Default

could be anything, check for vaccum leaks, check plugs. Ive also had a fuel pump give a random misfire a few months before it finally went out.
Reply
Old Aug 22, 2010 | 03:12 PM
  #3  
FIREHAWK#608's Avatar
Teching In
 
Joined: Jan 2008
Posts: 10
Likes: 0
From: FRISCO, Texas
Default

more than likely the coil pack is your problem
Reply
Old Aug 22, 2010 | 03:38 PM
  #4  
02formuladriver's Avatar
Thread Starter
Teching In
 
Joined: Jun 2010
Posts: 16
Likes: 0
From: Hawaii
Default

yeah i think it might be the coil pack but i just cleaned off the electric connector and it didnt show the 6th cylinder misfiring it just gave the random misfire but im going to change out that coil pack and see what it does
Reply
Old Aug 22, 2010 | 05:09 PM
  #5  
ds98formula's Avatar
TECH Resident
15 Year Member
Photogenic
iTrader: (3)
 
Joined: Mar 2008
Posts: 965
Likes: 0
From: Joliet Illinois
Default

Do you have a scan tool? If so you can loom at misfire counts and see if it is still doing it. If you do not have a scan tool unplug you battary for awile and see if the code comes back it could just be a result of the coil you cleaned if 6 was misfiring and you fixed that it could have saved the random code misfire code. Did you every have p0306 and p0300 at the same time?
Reply
Old Aug 22, 2010 | 09:40 PM
  #6  
02formuladriver's Avatar
Thread Starter
Teching In
 
Joined: Jun 2010
Posts: 16
Likes: 0
From: Hawaii
Default

at first it was a p0306 now its just a p0300 code ive erased it and it popped back up again so im going to check my vac lines and seals and ive already ordered a new coil pack to replace that one so we'll see how it goes from there
Reply




All times are GMT -5. The time now is 10:41 PM.

story-0
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

Don't get dad new socks or a grill brush this year.

By Brett Foote | 2026-06-09 14:55:56


VIEW MORE
story-1
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-2
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-3
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-4
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-5
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-6
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-7
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-8
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-9
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE