CorvetteForum - Chevrolet Corvette Forum Discussion

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

Problems starting

Thread Tools
 
Search this Thread
 
Old May 4, 2006 | 11:04 PM
Share
  #1  
lange's Avatar
lange
Thread Starter
Racer
15 Year Member
 
Joined: Jul 2005
Posts: 362
Likes: 1
From: Montreal quebec
Default Problems starting
sometimes the vette starts right away very fast and sometimes the vette takes a good 5-6 seconds... and I think it happens only when it takes that long but a cloud of smoke gets out the exhaust.

When it starts right away, I doesn't seem to do so.

Anyone knows what might be the problem?
Reply
0
Old May 4, 2006 | 11:09 PM
Share
  #2  
vader86's Avatar
vader86
Team Owner
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2001
Posts: 62,066
Likes: 1,722
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Default
engine hot or engine cold
Reply
0
Old May 4, 2006 | 11:10 PM
Share
  #3  
CAP94's Avatar
CAP94
Melting Slicks
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Feb 2006
Posts: 3,308
Likes: 6
From: Kentwood MI
Default
My 94 LT1 does the samething but without the smoke. I've been wondering why also. I thought maybe fuel pressure.
Reply
0
Old May 4, 2006 | 11:14 PM
Share
  #4  
CAP94's Avatar
CAP94
Melting Slicks
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Feb 2006
Posts: 3,308
Likes: 6
From: Kentwood MI
Default
I have the problem first thing in the morning sometimes, and other times after stopping for a quick errand.
Reply
0
Old May 5, 2006 | 07:33 AM
Share
  #5  
lange's Avatar
lange
Thread Starter
Racer
15 Year Member
 
Joined: Jul 2005
Posts: 362
Likes: 1
From: Montreal quebec
Default
doesn't matter hot or cold. I never know if it's gonna do it or not.
It starts in a fraction of a sec really strongly or it takes 5-6 secs and emits a puff of smoke
Reply
0
Old May 5, 2006 | 09:31 AM
Share
  #6  
RRT vette's Avatar
RRT vette
Le Mans Master
15 Year Member
 
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
Default
Well what color is the smoke and what does it smell like? Burnt oil, coolant, unburnt fuel? And have you checked fuel pressure? Perhaps the fuel pump relay is on its way out causing longer than usual starts due to oil pressure having to build.
Reply
0
Old May 5, 2006 | 05:15 PM
Share
  #7  
87~C4~Driver's Avatar
87~C4~Driver
Intermediate
 
Joined: Jan 2006
Posts: 34
Likes: 0
From: Norfolk Virginia
Default
Originally Posted by RRT vette
Well what color is the smoke and what does it smell like? Burnt oil, coolant, unburnt fuel? And have you checked fuel pressure? Perhaps the fuel pump relay is on its way out causing longer than usual starts due to oil pressure having to build.
this maybe the prob. i replaced my FP relay a few weeks ago and it still starts either right up or a few sec's later, but the FP relay may be the cause. do you know how to test the relay? .... look into that.
Reply
0
Old May 5, 2006 | 07:46 PM
Share
  #8  
mpcorvette's Avatar
mpcorvette
Instructor
 
Joined: Jul 2005
Posts: 125
Likes: 0
From: St. Peters Missouri
Default
Reply
0
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

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

 Michael S. Palmer
story-1

2027 Corvette vs The World: Every Model vs Closest Competitor

 Joe Kucinski
story-2

10 Most Common Corvette Problems of the Last 20 Years!

 Joe Kucinski
story-3

5 MOST and 5 LEAST Popular Corvette Model Years in History!

 Joe Kucinski
story-4

2027 Corvette Buyer's Guide: Everything You Need to Know!

 Joe Kucinski
story-5

10 Things C8 Corvette Owners Hate (But Won't Tell You)

 Joe Kucinski
story-6

10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!

 Brett Foote
story-7

Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)

 Joe Kucinski
story-8

Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!

 Michael S. Palmer
story-9

5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!

 Joe Kucinski
Old May 5, 2006 | 09:58 PM
Share
  #9  
RRT vette's Avatar
RRT vette
Le Mans Master
15 Year Member
 
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
Default
Originally Posted by 87~C4~Driver
this maybe the prob. i replaced my FP relay a few weeks ago and it still starts either right up or a few sec's later, but the FP relay may be the cause. do you know how to test the relay? .... look into that.
The fuel relay harness is testable. You can use a jumper wire on terminal A and E first and last wires) on the harness (red and orange on my 86) and see if the pump gets primed. The ecm will only prime it for about 2 sec. This gives power to the fuse then the pump. The engine should start without the relay just takes longer crank for the oil pressure to reach 4 psi. The oil pressure switch is a back up in case the relay fails so you don't get stranded. Use a test light on the FP fuse and turn the ignition on and the tester should light up for 2 sec. If it does then the relay is good. If the relay is good it should relay a charge to the fuel pump. When you turn the key on and hear the pump prime for 2 sec then the relay is good.
Last edited by RRT vette; May 5, 2006 at 10:06 PM.
Reply
0

Get notified of new replies

To Problems starting

Back to Subforum
C4 Tech/Performance
View Next Unread
Fuel injector question




Click for Advanced Search
Reply Closed Thread Share
Forum Jump
Trending Topics

All times are GMT -4. The time now is 01:20 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