C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Testing an Optispark???

Thread Tools
 
Search this Thread
 
Old Apr 1, 2005 | 09:59 PM
  #1  
greggo's 94LT1's Avatar
greggo's 94LT1
Thread Starter
Instructor
 
Joined: Sep 2003
Posts: 118
Likes: 1
From: Plano TX
Default Testing an Optispark???

Does anyone know if there is a way to test an opti to make sure everything is good before I have to take out a 2nd mortgage on my house to buy another one?

I feel like I've waited all year for Christmas to get here and Santa dies on his way to my house right befor he arives.

I just got everything back together today from a mojor project (port & polish the heads and intake) among other things. I have several other mods I've done in the past and have had the PCM redone to reflect those changes. Nothing to re-program for here. It's been down 5 weeks now and took her out for a drive this afternoon and a slight miss developed after about 20 minutes of driving. Then, took the valve covers back off and re-adjusted the valves (took them to 0 lash, added 1/4 turn, and then locked them down with the poly locks). Now runs like total *** and can hardly get it to start. It's like ALL of the plug wires are crossed, but I KNOW they are run correctly....

HELP!!!
Reply
Old Apr 1, 2005 | 10:17 PM
  #2  
STL94LT1's Avatar
STL94LT1
Race Director
20 Year Member
Conversation Starter
All Eyes On Me
Liked
 
Joined: Jan 2002
Posts: 12,261
Likes: 85
From: O'Fallon Missouri
Default

It sounds like your valve lash may be off.
Reply
Old Apr 2, 2005 | 12:08 AM
  #3  
Gary04Z06's Avatar
Gary04Z06
Le Mans Master
25 Year Member
Conversation Starter
All Eyes On Me
Photogenic
 
Joined: Oct 2000
Posts: 6,197
Likes: 9
From: St. louis, MO
Default

Here is a post with a bunch of links talking about the opti:
http://www.crossedflags.com/nuke/htm...wtopic&t=16351
Reply
Old Apr 4, 2005 | 11:15 AM
  #4  
ToyC4's Avatar
ToyC4
Drifting
 
Joined: Feb 2004
Posts: 1,485
Likes: 2
From: Champaign, IL
St. Jude Donor '05
Default

Originally Posted by Gary96LT4
Here is a post with a bunch of links talking about the opti:
http://www.crossedflags.com/nuke/htm...wtopic&t=16351

very informative and helpful link
Reply
Old Apr 4, 2005 | 02:37 PM
  #5  
MikeC4's Avatar
MikeC4
Melting Slicks
 
Joined: Oct 2004
Posts: 2,510
Likes: 4
From: Austin Texas
Default

Originally Posted by Gary96LT4
Here is a post with a bunch of links talking about the opti:
http://www.crossedflags.com/nuke/htm...wtopic&t=16351
Don't know if you caught this, but at the end of one of the articles from the above URL, they list symtoms of a bad Optispark:

Symptoms:

* Car suddenly dies and won't restart
* Starts but immediately dies
* Extended cranking to start
* Rough idle
* Sputtering
* Backfiring
* Trouble reaching higher rpm
* Black smoke from exhaust
* Poor performance with car warmed up
* Weak plug wire spark
* Codes 16, 36, and 42 may be set (Did you check your error codes????)


Last edited by MikeC4; Apr 4, 2005 at 02:40 PM.
Reply

Get notified of new replies

To Testing an Optispark???





All times are GMT -4. The time now is 12:56 PM.

story-0
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-1
2027 Corvette vs The World: Every Model vs Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-20 17:58:41


VIEW MORE
story-2
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE
story-3
5 MOST and 5 LEAST Popular Corvette Model Years in History!

Slideshow: 5 most and least popular Corvette model years.

By Joe Kucinski | 2026-04-08 13:25:01


VIEW MORE
story-4
2027 Corvette Buyer's Guide: Everything You Need to Know!

Slideshow: 2027 Corvette buyer's guide

By Joe Kucinski | 2026-04-17 16:41:08


VIEW MORE
story-5
10 Things C8 Corvette Owners Hate (But Won't Tell You)

Slideshow: 10 things C8 Corvette owners hate, but won't tell you.

By Joe Kucinski | 2026-04-01 18:36:07


VIEW MORE
story-6
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!

Slideshow: Should you add one of these incredible Corvettes to your garage?

By Brett Foote | 2026-04-01 18:14:05


VIEW MORE
story-7
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)

Slideshow: Every Corvette Grand Sport explained

By Joe Kucinski | 2026-03-26 07:13:44


VIEW MORE
story-8
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!

Slideshow: Breaking down the 2027 Grand Sport, Grand Sport X, Stingray, and LS6 V8.

By Michael S. Palmer | 2026-03-26 13:48:45


VIEW MORE
story-9
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!

Slideshow: 5 reasons bad drivers crash sports cars & 5 ways to avoid a costly shame!

By Joe Kucinski | 2026-03-25 16:32:55


VIEW MORE