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

97 formula misfiring

Thread Tools
 
Search this Thread
 
Old Nov 3, 2009 | 06:39 PM
  #1  
Cruzer23's Avatar
Thread Starter
Launching!
iTrader: (3)
 
Joined: Jun 2009
Posts: 219
Likes: 0
From: Smyrna,TN
Default 97 formula misfiring

I have changed plus, wires, and fuel filter about 6 months ago. Felt around everything lookfs and feels connected and in good shape.

I'm running fuel injector cleaner just in case its that.

Guy at part store suggests cap and rotor. My dad says he didn't think I had that.

What would u suggest trying next? I worked since its been misfiring, tomorrow I'm off and can dig in and figure it out. Just hoping to find easier faster things to try first.

Thanks
Reply
Old Nov 3, 2009 | 08:14 PM
  #2  
Greenfire's Avatar
TECH Enthusiast
iTrader: (2)
 
Joined: Nov 2004
Posts: 713
Likes: 0
From: San Antonio, Texas
Default

Did you mess with the opti spark at all? Make sure they are connected to the proper plug. If you didn't hook them back up right it will cause it to misfire like crazy. Could be the rotor/cap in the opti how many miles are on the car? Is it the original opti?
Reply
Old Nov 3, 2009 | 08:24 PM
  #3  
Cruzer23's Avatar
Thread Starter
Launching!
iTrader: (3)
 
Joined: Jun 2009
Posts: 219
Likes: 0
From: Smyrna,TN
Default

I did the plugs and wires 6 months ago, if I didn't hook something up right it wouldn't take 6 months for it to start messing up would it?

It has 122xxx miles. I have only had it since 119xxx and I have not touched the opti. Dunno if previous owner did or did not.
Reply
Old Nov 3, 2009 | 10:33 PM
  #4  
Cruzer23's Avatar
Thread Starter
Launching!
iTrader: (3)
 
Joined: Jun 2009
Posts: 219
Likes: 0
From: Smyrna,TN
Default

If I change cap and rotor and it still misfires what else is should I try? Some friends guess it might be o2 sensors? Is that possible?

Sorry to be a pest but I really need this fixed fast, its my DD
Reply
Old Nov 3, 2009 | 10:46 PM
  #5  
whytryz28's Avatar
TECH Junkie
iTrader: (28)
 
Joined: Feb 2007
Posts: 3,757
Likes: 2
From: Hawaii
Default

What is it doing exactly?
Reply
Old Nov 4, 2009 | 04:39 AM
  #6  
Cruzer23's Avatar
Thread Starter
Launching!
iTrader: (3)
 
Joined: Jun 2009
Posts: 219
Likes: 0
From: Smyrna,TN
Default

At idle in park its just barely noticable u can hear it.

When in drive with foot on break, it is shaking, bucking, whatever. Not trying to die but won't sit still.

When accelerating u can really feel it missing. It starts going then u like bog down then it kicks back in.

I drove to the parts store and to work, but u can so feel it.
Reply
Old Nov 5, 2009 | 06:57 AM
  #7  
Cruzer23's Avatar
Thread Starter
Launching!
iTrader: (3)
 
Joined: Jun 2009
Posts: 219
Likes: 0
From: Smyrna,TN
Default

I pulled plugs and wires all looked fine and gapped right. Pulled 1 wire at a time off and started it and it sounds and runs the same. Pulled 3-4 same results.

If it was plug wire or distributor wouldn't u have instantly noticed a difference in it running?

So what do I try now?

Anyone?

Thanks
Reply
Old Nov 5, 2009 | 12:28 PM
  #8  
Firechicken399's Avatar
Banned
iTrader: (1)
 
Joined: Nov 2009
Posts: 3
Likes: 0
From: Telford Pa
Default

Same thing has happened to me more than once , could be a burnt wire that is laying on the exhaust manifold or the opti has water in it. good luck
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

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

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

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

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Nov 5, 2009 | 08:43 PM
  #9  
Cruzer23's Avatar
Thread Starter
Launching!
iTrader: (3)
 
Joined: Jun 2009
Posts: 219
Likes: 0
From: Smyrna,TN
Default

took it to dealer ship, he wanted to take the opti off and check it out, and replace the wire and plug of a cylinder that is missing.

i have everything off but the cap and rotor. took 2 screw off the cap, but the 2 that are in the holes of the cap, what tool do u use to get them out? i have one that fits it, but the skinny part is not long enough to go deep into the hole. so im stuck, going to parts store tomorrow see if they can help.
Reply
Old Nov 5, 2009 | 10:32 PM
  #10  
tdevil55's Avatar
12 Second Club
iTrader: (23)
 
Joined: Dec 2008
Posts: 220
Likes: 0
From: Hampton, VA
Default

Its something thats called the reverse torx in e-4. I found one at the local napa. Not too expensive, some say its hard to find.

Reply




All times are GMT -5. The time now is 11:42 AM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE