LT1-LT4 Modifications 1993-97 Gen II Small Block V8

P0300 misfire code... data info included

Thread Tools
 
Search this Thread
 
Old Dec 4, 2006 | 02:25 PM
  #1  
KillinFormula's Avatar
Thread Starter
Staging Lane
 
Joined: Dec 2002
Posts: 53
Likes: 0
From: Greenville Texas
Default P0300 misfire code... data info included

getting a random misfire code... here is all my infor at idle (doesnt really misfire at idle)

02 b1 s1 - between 1-850 mv (bounces around, normally says up in the higher range 500-800)

02 b1 s2 - 443 (PCMFORLESS)

02 b2 s1 - between 1-850 mv (bounces around, normally says up in the higher range 500-800) follows the 02 b1 s1 oxygen sensor pretty much

02 b2 s2 - 443 (PCMFORLESS)

Closed loop
IGN cycle DTC - no
ST trim 1 (%) - 0
ST trim 2 (%) - 0
LT trim 1 (%) - 25
LT trim 2 (%) - 25
maf (gm/sec) - 11.3-12
map (v) - 2.10
map ("hg) - 13.5-14.8
Baro (v) - 4.94
Baro ("hg) - 30.7
coolant - 198
intake air (F) - 97
IAC position - 55
IAC memory - 32
Desired idle - 800
FT cell - no
engine load - 4%
Knock retard - 1.0
spark advance - 22
CS counter - 5661
CCP duty cycle - 0

rpm fine res - 850-990
rpm lo res - -.76 to - 6.13
FT learn - yes

TPS norm (%) - no
EGr duty - no
AIR pump - off
Evap vac switch - off
A/F ratio - 14.7

ST trim avg B1 - 127
LT trim avg B1 - 144
ST trim avg B2 - 128
LT trim avg B2 - 144

MISFIRES after a short normal drining run, with a few revs (reset scanner before run)
1 - 4
2- 1486
3 - 0
4 - 0
5 - 43
6 - 0
7 - 1369
8 - 0

misfires before short run (before resetting scanner) (driving in low and high rpms)
1-6
2-1563
3-8
4-0
5-2982
6-0
7-1169
8-0

I can really feel the misfires down low like between 1000-2500 rpms

I have new plugs and opti.
__________________
1996 Formula M6
Mods: LT4 Hot Cam, 1.6 RR's, Moroso CAI, MAC Mids, ORY-pipe, Cut-out, LT4 KM, Air Foil, EGR!, AIR!, 3.73's, PCMFORLESS, Pro-kit springs, PHR adjustable, Grandsports- 9.5X17 front & 11X17 back, and Nitto 315s on back, Electric Cut-out, Shift Light, 160 thermo, 1LE elbow, B&M Ripper, and TA girdle. soon: LTCC and LCA's with Relocation brackets
Reply
Old Dec 4, 2006 | 08:09 PM
  #2  
KillinFormula's Avatar
Thread Starter
Staging Lane
 
Joined: Dec 2002
Posts: 53
Likes: 0
From: Greenville Texas
Default

FIXED.... bad coil wire.
Reply




All times are GMT -5. The time now is 06:26 AM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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
story-9
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE