PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Random Cylinder Missfire Code

Thread Tools
 
Search this Thread
 
Old Dec 14, 2009 | 10:21 AM
  #1  
FastB's Avatar
Thread Starter
Launching!
iTrader: (11)
 
Joined: May 2007
Posts: 231
Likes: 0
From: Houston, TX
Default Random Cylinder Missfire Code

Everything is stock except for my cam and exhaust. The cam swap was very recent and it has been tuned. Started throwing Random Cylinder Missfire so I find a loose spark plug and wire. Tighten them and code goes away. Drive it for a couple of days no problems and sitting in traffic one night Check engine light comes on again, same code. What could it be this time?
Reply
Old Dec 14, 2009 | 10:37 AM
  #2  
lovingdaddyof2's Avatar
Teching In
 
Joined: Mar 2007
Posts: 3
Likes: 0
From: eastampton nj
Default

Originally Posted by FastB
Everything is stock except for my cam and exhaust. The cam swap was very recent and it has been tuned. Started throwing Random Cylinder Missfire so I find a loose spark plug and wire. Tighten them and code goes away. Drive it for a couple of days no problems and sitting in traffic one night Check engine light comes on again, same code. What could it be this time?
whats the lift and duration of the cam? even with the tune if you idle to long with a decent size cam it will periodically throw that code
Reply
Old Dec 14, 2009 | 01:54 PM
  #3  
FastB's Avatar
Thread Starter
Launching!
iTrader: (11)
 
Joined: May 2007
Posts: 231
Likes: 0
From: Houston, TX
Default

226/234 .598”/.602” 111LSA +3 advance

That sounds reasonable I guess, but would the code re-set after the car has been turned off and cranked again?
Reply
Old Dec 14, 2009 | 02:01 PM
  #4  
lovingdaddyof2's Avatar
Teching In
 
Joined: Mar 2007
Posts: 3
Likes: 0
From: eastampton nj
Default

Originally Posted by FastB
226/234 .598”/.602” 111LSA +3 advance

That sounds reasonable I guess, but would the code re-set after the car has been turned off and cranked again?
thats the problem. yes it will reset itself if the problem doesnt happen within a certain amount of time. i have had the same thing for about 3 years now. if it shows a specific cylnder then i would worry. and it looks like your coming pretty close to your piston with that much lift on the exhaust i always heard .600 was about max with out cutting the pistons
Reply
Old Dec 14, 2009 | 02:30 PM
  #5  
FastB's Avatar
Thread Starter
Launching!
iTrader: (11)
 
Joined: May 2007
Posts: 231
Likes: 0
From: Houston, TX
Default

Patrick G. spec'd the cam for me so I hope it is ok. I don't think he would have spec'd me a cam based on the info I gave him that would not work. Thanks for the help.
Reply




All times are GMT -5. The time now is 02:19 PM.

story-0
10 Reasons Daily Driving a Swap Project SUCKS! (& 1 Reason to Do It Anyway)

Slideshow: 10 reasons daily-driving a swap project might not be for you. Or is it?

By Michael S. Palmer | 2026-06-17 09:39:05


VIEW MORE
story-1
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-2
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 | 2026-06-18 10:26:23


VIEW MORE
story-3
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-4
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-5
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-6
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-7
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-8
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-9
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