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

engine performance

Thread Tools
 
Search this Thread
 
Old Sep 24, 2013 | 05:18 PM
  #1  
desserts13's Avatar
desserts13
Thread Starter
3rd Gear
 
Joined: Sep 2013
Posts: 3
Likes: 0
Default engine performance

i have a 1994 coupe with 75k on it last 2 years can not find a problem or cause .when on highway on longer drives and come into traffic and have to slow down and then try to regain speed it has bad hesitation and it sounds like it has knocking sound.it happens around45 to 55 miles mph and i have to regain speed slowly until i get beyond that speed, i cant just punch it.has anybody had this problem or may have any ideas.just changed fuel filter cleaned air intakes also my guy found a vacume line leak. thank you for any help
Reply
Old Sep 24, 2013 | 06:30 PM
  #2  
kimmer's Avatar
kimmer
Le Mans Master
15 Year Member
Conversation Starter
All Eyes On Me
Liked
 
Joined: Jul 2009
Posts: 6,381
Likes: 66
From: SF bay area C.A.
C4 of the Year Finalist
Default

Check your EGR, it may be stuck open a bit.
Reply
Old Sep 24, 2013 | 10:59 PM
  #3  
mxw128's Avatar
mxw128
Burning Brakes
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Feb 2002
Posts: 1,231
Likes: 28
From: South Riding VA
Default

I'd agree to check EGR... And what about the IAC? Maybe it's sticking open when you transition back to throttle? .. Just a thought...
Reply
Old Sep 25, 2013 | 08:08 AM
  #4  
desserts13's Avatar
desserts13
Thread Starter
3rd Gear
 
Joined: Sep 2013
Posts: 3
Likes: 0
Default

Originally Posted by kimmer
Check your EGR, it may be stuck open a bit.
thank you for your help will try anything thanks for taking the time
Reply
Old Sep 25, 2013 | 08:10 AM
  #5  
desserts13's Avatar
desserts13
Thread Starter
3rd Gear
 
Joined: Sep 2013
Posts: 3
Likes: 0
Default

Originally Posted by mxw128
I'd agree to check EGR... And what about the IAC? Maybe it's sticking open when you transition back to throttle? .. Just a thought...
going to mention this to my mechanic he"s frustrated as well thank you for your time
Reply
Old Sep 25, 2013 | 09:39 AM
  #6  
Mohammed_z's Avatar
Mohammed_z
Drifting
15 Year Member
Liked
 
Joined: Jan 2010
Posts: 1,624
Likes: 48
From: Saudi Arabia
Default

Originally Posted by desserts13
going to mention this to my mechanic he"s frustrated as well thank you for your time

Take the car and fix it yourself , if the mechanic is frustrated then he is not doing the best.
Reply

Get notified of new replies

To engine performance





All times are GMT -4. The time now is 06:48 AM.

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