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

Problem?????

Thread Tools
 
Search this Thread
 
Old Jul 29, 2007 | 01:43 AM
  #21  
vinnies87's Avatar
vinnies87
Le Mans Master
 
Joined: Aug 2003
Posts: 9,884
Likes: 3
From: Magnolia Mississippi
St. Jude '03-'04-'05-'06-'07
Default

Get a FSM and start there.... or Check the Tech Tips..... or Use the Search function....
Reply
Old Jul 29, 2007 | 11:31 AM
  #22  
LAAllison's Avatar
LAAllison
Advanced
15 Year Member
All Eyes On Me
 
Joined: Jan 2006
Posts: 77
Likes: 0
From: Fairhope Alabama
Default Rough running

Lots of good ideas. The best thing is that all these are inexpensive and things most of us can do ourself.

Art


Roll Tide
Reply
Old Jul 29, 2007 | 01:17 PM
  #23  
Corvette85350's Avatar
Corvette85350
Thread Starter
Pro
 
Joined: May 2007
Posts: 714
Likes: 0
From: Fort Worth Texas
Default

Originally Posted by LAAllison
Lots of good ideas. The best thing is that all these are inexpensive and things most of us can do ourself.

Art


Roll Tide

Yeah, but most of what yall are saying is over my head. Lol.
Reply
Old Jul 29, 2007 | 01:31 PM
  #24  
jhammons01's Avatar
jhammons01
Le Mans Master
10 Year Member
 
Joined: May 2006
Posts: 9,226
Likes: 9
From: Irvine Ca
Default

Originally Posted by Corvette85350
Yeah, but most of what yall are saying is over my head. Lol.
Listen, while I have reservation about yanking a wire off with your bare hand.......it is a good way to figure out which wire is misfiring. Just use an insulated pair of pliers to grab the wire at the distributor.

Pull one at a time and listen for a difference. then make sure your completely return that wire on the distributor before you pull another.

Go through all 8 of them, you'll find one that leads to no change at all. Then at least you can tell the service writer that you have a dead cylinder and provide him with which cylinder number to focus on.

Or, you could try new Wires yourself. basically buy new wires, line them up on the driveway from longest to shortest. Then (when the car is off and cool) yank one wire off completely. Find the matching length wire from the new set and put it on the exact same spot the old one came off.......and pay attention the physical routing. Put your new wire in the same routing as the one you took off.

Now move to wire Number 2. and repeat the process.

Two hours later your ready to start the car and see if it makes a difference.

if it did, GREAT you found the problem, If it doesn't make a difference then you just performed a maintenance item that the Dealer charges $200 for doing and you only paid $45....stick a feather in your hat and call it a day.
Reply
Old Jul 29, 2007 | 02:16 PM
  #25  
golfman2008's Avatar
golfman2008
Drifting
 
Joined: Mar 2004
Posts: 1,500
Likes: 1
From: Mauldin sc
St. Jude Donor '05
Default

Originally Posted by Corvette85350
My 85 has been really shaky lately. Its like you either have to floor it, or it doesnt move at all. Its weird. And when youre just barely holding the gas it just shakes like crazy. Has anyone experienced this problem, or does anyone know what it is? Thanks, Zak.


Its sounds like Alzheimer I would take em to the car doctor






" Turn Your Bottom Breather Into a Ram Breather "
http://www.C4orceCorvette.com
Reply
Old Jul 29, 2007 | 05:06 PM
  #26  
Corvette85350's Avatar
Corvette85350
Thread Starter
Pro
 
Joined: May 2007
Posts: 714
Likes: 0
From: Fort Worth Texas
Default

Originally Posted by jhammons01
Listen, while I have reservation about yanking a wire off with your bare hand.......it is a good way to figure out which wire is misfiring. Just use an insulated pair of pliers to grab the wire at the distributor.

Pull one at a time and listen for a difference. then make sure your completely return that wire on the distributor before you pull another.

Go through all 8 of them, you'll find one that leads to no change at all. Then at least you can tell the service writer that you have a dead cylinder and provide him with which cylinder number to focus on.

Or, you could try new Wires yourself. basically buy new wires, line them up on the driveway from longest to shortest. Then (when the car is off and cool) yank one wire off completely. Find the matching length wire from the new set and put it on the exact same spot the old one came off.......and pay attention the physical routing. Put your new wire in the same routing as the one you took off.

Now move to wire Number 2. and repeat the process.

Two hours later your ready to start the car and see if it makes a difference.

if it did, GREAT you found the problem, If it doesn't make a difference then you just performed a maintenance item that the Dealer charges $200 for doing and you only paid $45....stick a feather in your hat and call it a day.

Yeah, I might just have to try new plug wires. I already thought about doing it anyway. Whats a good brand to buy, and what will it run me? Thanks, Zak.
Reply
Old Jul 29, 2007 | 05:09 PM
  #27  
CRV3TT3's Avatar
CRV3TT3
Burning Brakes
15 Year Member
 
Joined: Oct 2005
Posts: 1,176
Likes: 0
From: Suffolk Va
Default

MSD - $74.20 from Summit.

I just ordered a set last night.
Reply
Old Jul 29, 2007 | 05:21 PM
  #28  
Corvette85350's Avatar
Corvette85350
Thread Starter
Pro
 
Joined: May 2007
Posts: 714
Likes: 0
From: Fort Worth Texas
Default

Originally Posted by CRV3TT3
MSD - $74.20 from Summit.

I just ordered a set last night.

What does everyone else think? Is this the best brand to get?
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-1

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-2

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-3

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-4

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-5

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-6

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-7

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-8

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

 Michael S. Palmer
story-9

2027 Corvette vs The World: Every C8 vs Its Closest Competitor

 Joe Kucinski
Old Jul 29, 2007 | 06:02 PM
  #29  
CFI-EFI's Avatar
CFI-EFI
Race Director
10 Year Member
 
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Default

Originally Posted by Corvette85350
Yeah, I might just have to try new plug wires. I already thought about doing it anyway. Whats a good brand to buy, and what will it run me? Thanks, Zak.
How old are the plug wires? Do you have any good reason to suspect them? You can ohm them and maybe save your self the $45.00.



Originally Posted by Corvette85350
TPS voltage???
Originally Posted by Corvette85350
Yeah, but most of what yall are saying is over my head. Lol.
You need to order the FSM and read it, and study it. Besides guiding you through repairs and the invaluable trouble shooting charts, the manual explains the operation of many of the car's systems. Until "most of what yall are saying" isn't over your head, you are going to be at the mercy of having to "throw money" at the problems (like maybe the plug wires you haven't yet tested), or professional mechanics, some of which aren't a whole lot better informed than you are. Before you can be helped, much, you have to help yourself.

It sounds to me like you have some crossed plug wires. It will cost you nothing to trace them down and verify that all the wires are on the correct plugs.

RACE ON!!!
Reply
Old Jul 29, 2007 | 07:10 PM
  #30  
dan0617's Avatar
dan0617
Burning Brakes
15 Year Member
 
Joined: Dec 2006
Posts: 936
Likes: 2
From: Tyrone PA
Default

Originally Posted by jhammons01
SEEEE!!! that was a question I had in this and another thread.

Someone said the same thing about "just pull a wire off at the distributor". My question was while the motor was running?

Just being unsure of myself I didn't question further. But I'll say this......you only grab a wire, while the motor is running/starting, bare handed one time and one time only.
When I was 14 and my brother was 16, we were working on a missfire problem on his 4cyl AMC Spirit. It would only run at 1/2 throttle or more. I held the gas most of the way down, and he grabbed the coil wire thinking it was the first one to try........ .......is what he looked like running across the yard.
Reply
Old Jul 29, 2007 | 11:14 PM
  #31  
CentralCoaster's Avatar
CentralCoaster
Team Owner
 
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Default

Originally Posted by Corvette85350
What does everyone else think? Is this the best brand to get?
MSD is unnecessary and beyond your budget.

If you need new wires, get oem replacements.
Reply




All times are GMT -4. The time now is 06:44 AM.

story-0
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-1
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-2
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-3
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-4
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-5
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-6
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-7
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-8
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-9
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE