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

Surging help/Vacuum Question/ miss under load

Old Aug 3, 2008 | 12:51 PM
  #1  
cgroh89's Avatar
Thread Starter
TECH Resident
iTrader: (15)
 
Joined: Jan 2008
Posts: 822
Likes: 0
From: Memphis TN
Default Surging help/Vacuum Question/ miss under load

Well After months of battling my car I got it running. Broken valve springs bad o2 sensors crazy stuff

Right now at about 800-900 idling ( I think it is high) I have around 17-18 inches of vacuum, I have a comp cam almost the same specs of a hotcam along with rr beehives etc.

When I am crusing at say around 60mph and I put it in neutral the car will surge for a idle between 1300-1600 until I come to a complete stop

As well Under heavy load. say 60mph again in 6th gear , before I had all these issues of course if you stepped on the gas it would just take for ever to accelerate now, It has a hard miss and shakes the hole car

It is a 1993 Comp cam with hot cam specs New msd wires and tr55's msd coil the plugs are not fouled and the wires are not burnt , I went and started it at night and did not see any arching

So far before I got it drivable the o2's were dropping the stft down to 0 and I replaced those now it will stay in closed loop. As well I messed with it yesterday and found a broken injector wire. Fixed it but it did not fix the issue Any ideas ?
Reply


Thread Tools
Search this Thread

All times are GMT -5. The time now is 09:51 AM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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
story-8
Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0

The world was a better place when it was still around.

By Brett Foote | 2026-01-23 09:20:37


VIEW MORE
story-9
10 Reasons the LS7 Is GM's Most Extreme Naturally Aspirated V8 Engine Ever

Slideshow: The 7.0-liter LS7 was designed for absolute cutting-edge performance.

By Verdad Gallardo | 2026-01-07 18:36:00


VIEW MORE