Fueling & Injection Fuel Pumps | Injectors | Rails | Regulators | Tanks

Car is REALLY sluggish on first startup. Like it's loading up.

Thread Tools
 
Search this Thread
 
Old Nov 13, 2007 | 04:00 PM
  #1  
snketr's Avatar
Thread Starter
TECH Enthusiast
iTrader: (3)
 
Joined: Sep 2003
Posts: 654
Likes: 0
From: St Louis, MO
Default Car is REALLY sluggish on first startup. Like it's loading up.

When i start the car after it's been sitting for a while it's really finicky, like it's loading up on fuel and needs to be gone to WOT to clean it out. It'll hesitate and accelerate like crap if I'm normally driving it. But as soon as I get it past 3k it's fine after that. It's weird, like an old carb setup. Every now and then I can feel a slight hesitation also.


I'm getting a MAF code, so I'm replacing it. Think that could be the cause?

Also, when I go to start it after it's been sitting for about 20-30 min, it barely comes to life or I'll have to crank for about 10 sec before it starts, both times I have to give it gas to get it to rev up. it'll idle at like 200 rpm otherwise.
Reply
Old Dec 3, 2007 | 09:58 AM
  #2  
snketr's Avatar
Thread Starter
TECH Enthusiast
iTrader: (3)
 
Joined: Sep 2003
Posts: 654
Likes: 0
From: St Louis, MO
Default

Anyone? Bueller?
Reply
Old Dec 3, 2007 | 10:16 AM
  #3  
apex1's Avatar
Staging Lane
 
Joined: Mar 2006
Posts: 89
Likes: 0
From: Terre Haute, IN
Default

Oil pump get it checked out and please stop reving to build pressure! Sounds like oil pressure to me.
Reply
Old Dec 5, 2007 | 03:43 PM
  #4  
snketr's Avatar
Thread Starter
TECH Enthusiast
iTrader: (3)
 
Joined: Sep 2003
Posts: 654
Likes: 0
From: St Louis, MO
Default

Oil pressure? I've got great oil pressure at all times.
Reply
Old Dec 5, 2007 | 04:25 PM
  #5  
DuronClocker's Avatar
11 Second Club
15 Year Member
iTrader: (25)
 
Joined: Nov 2005
Posts: 1,241
Likes: 1
From: Clearwater, FL
Default

How many miles on it? The restart problem sounds like leaky fuel injectors.

What does it do if it sits overnight? Does it fire quickly, or does it still take a long time to fire? I understand how it acts once its running.
Reply
Old Dec 5, 2007 | 04:31 PM
  #6  
snketr's Avatar
Thread Starter
TECH Enthusiast
iTrader: (3)
 
Joined: Sep 2003
Posts: 654
Likes: 0
From: St Louis, MO
Default

If it sits over night it fires right up. I has new Lucas 30# injectors on it.
Reply
Old Dec 6, 2007 | 08:13 AM
  #7  
DuronClocker's Avatar
11 Second Club
15 Year Member
iTrader: (25)
 
Joined: Nov 2005
Posts: 1,241
Likes: 1
From: Clearwater, FL
Default

My vote is for leaking fuel injectors then.

They leak til pressure is bled off when you turn the car off, and the gas doesn't have time to evaporate if you try turning the car on too quickly, and it has a hard time starting. If it sits overnight, the leaked fuel evaporates, and the car starts right up.

Had the exact same problems on my '88 TA. Swapped the stock 80k/17-year-old injectors for some newer LT1 injectors at the time, and all was well
Reply
Old Dec 6, 2007 | 08:55 AM
  #8  
snketr's Avatar
Thread Starter
TECH Enthusiast
iTrader: (3)
 
Joined: Sep 2003
Posts: 654
Likes: 0
From: St Louis, MO
Default

Hmm, I guess I'll try to get a set and see what it does.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

 Pouria Savadkouei
story-1

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

 Verdad Gallardo
story-2

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-3

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-4

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-5

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-6

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-7

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-8

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-9

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo




All times are GMT -5. The time now is 02:50 AM.

story-0
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-1
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-2
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-3
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-4
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-5
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-6
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-7
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-8
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-9
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