Getting a Miss Under a Load

Reply Subscribe

Thread Tools

Search this Thread

Aug 29, 2011 | 09:22 PM

Wicked94z28

Thread Starter

11 Second Club

Joined: Feb 2011

Posts: 142

Likes: 0

From: Willard, OH

Getting a Miss Under a Load

when Im under a load I have a miss , its not horrible but its still killing me.... I just put a new set of ngk irridiums in it, wires have about 800miles on them and are 10.2's, still have it.... a couple days ago we but some "blueberry burnout" fuel additive in it but i ran that gas out , threw 10 in, ran that out, put 10 more in, and ran that out and just put 20 in the tank and its still going on...... opti is gm performance that I just replaced about 200miles ago... any ideas?

Aug 29, 2011 | 09:24 PM

defaultexistence

TECH Fanatic

iTrader: (11)

Joined: Sep 2005

Posts: 1,954

Likes: 1

From: fort walton beach,fl

Plugs or their gap what is gap?

Aug 29, 2011 | 09:27 PM

Wicked94z28

Thread Starter

11 Second Club

Joined: Feb 2011

Posts: 142

Likes: 0

From: Willard, OH

i left them alone at 50

Aug 29, 2011 | 11:18 PM

Wicked94z28

Thread Starter

11 Second Club

Joined: Feb 2011

Posts: 142

Likes: 0

From: Willard, OH

Should I gap them different?

Aug 30, 2011 | 02:16 AM

FormulaJoe

TECH Regular

iTrader: (5)

Joined: Dec 2010

Posts: 497

Likes: 0

From: Too close to the cities, MN

I'm dealing with a similar problem. The book says 45, right? I'm thinking I just need a tune..

Aug 30, 2011 | 02:43 AM

96LT1355Z28

10 Second Club

iTrader: (2)

Joined: Nov 2007

Posts: 841

Likes: 9

From: Holden, MO (KC)

Wicked, if you sig is accurate you might try gapping them a little tighter, when my gap was to big it would idle and drive in town fine but under WOT it would cut out and miss above 3000 rpm. I'm using Autolite 104's @ .030 now.

Aug 30, 2011 | 10:15 AM

Wicked94z28

Thread Starter

11 Second Club

Joined: Feb 2011

Posts: 142

Likes: 0

From: Willard, OH

96 that's about exactly what mines doing.... gonna go pull them and knock em down to 30 and ill.let ya know how it goes!

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Verdad Gallardo

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Pouria Savadkouei

Top 10 Most Powerful Chevy Trucks Ever Made!

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Verdad Gallardo

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Verdad Gallardo

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Verdad Gallardo

10 Camaros You Should Never Buy

10 LS Engine Myths That Refuse to Die

Verdad Gallardo

Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0

Brett Foote

10 Reasons the LS7 Is GM's Most Extreme Naturally Aspirated V8 Engine Ever

Verdad Gallardo

Aug 30, 2011 | 10:44 AM

RamAir95TA

TECH Senior Member

iTrader: (2)

Joined: May 2005

Posts: 9,467

Likes: 8

From: South Jersey

Likely an ignition issue. Cylinder pressures are higher under load which can blow out spark if the gap is too large or too weak.

Aug 30, 2011 | 03:28 PM

#10

Wicked94z28

Thread Starter

11 Second Club

Joined: Feb 2011

Posts: 142

Likes: 0

From: Willard, OH

That was the problem, gapped em at 30 and.now.she's running like she should....now time to break this Detroit locker launching tomarow night lol

Aug 30, 2011 | 03:58 PM

#11

defaultexistence

TECH Fanatic

iTrader: (11)

Joined: Sep 2005

Posts: 1,954

Likes: 1

From: fort walton beach,fl

ehhhhpp!

Aug 30, 2011 | 08:39 PM

#12

nascarnate326

TECH Fanatic

iTrader: (1)

Joined: Sep 2009

Posts: 1,574

Likes: 1

From: Michigan

I would guess ignition as well.

MAF, o2 sensor, plugs, wires, opti, idk what else it could be.

I did plugs, wires, opti, and MAF all at once.

Aug 30, 2011 | 08:44 PM

#13

wrd1972

TECH Veteran

iTrader: (12)

Joined: Mar 2006

Posts: 4,668

Likes: 5

From: Central Kentucky

Check for above normal resistance on the plug wires. I had small misfires due to the helical conductor being broken at the terminal on my MSD wires. Repaired the wires and all had acceptable resistance.

Aug 30, 2011 | 09:39 PM

#14

defaultexistence

TECH Fanatic

iTrader: (11)

Joined: Sep 2005

Posts: 1,954

Likes: 1

From: fort walton beach,fl

Lol !

Aug 30, 2011 | 09:40 PM

#15

RamAir95TA

TECH Senior Member

iTrader: (2)

Joined: May 2005

Posts: 9,467

Likes: 8

From: South Jersey

Apparently everyone missed the point where he mentioned he fixed his problem...

Aug 31, 2011 | 01:27 AM

#16

ls2pontiac

Self-Admitted Scammer

iTrader: (1)

Joined: Aug 2007

Posts: 497

Likes: 1

From: Orange County, CA

You need to convert to the EFI 24x system, screw the damn opti

Sep 1, 2011 | 09:55 AM

#17

Wicked94z28

Thread Starter

11 Second Club

Joined: Feb 2011

Posts: 142

Likes: 0

From: Willard, OH

Love the opti.....I'm.at the.point.with the opti where.I have a.lifetime.warranty and.got.so.good.at.swapping.them it.takes.less.then a hour for a.swap.and back on.the road!

Sep 1, 2011 | 03:30 PM

#18

jaycenk

TECH Addict

iTrader: (1)

Joined: Jun 2009

Posts: 2,210

Likes: 1

From: Holiday, FL

It's your blinker fluid level...you over filled it.
Good to know about the plug gap. I had no idea it would blow it out. lert me sumtin new today boss.