Generation III External Engine LS1 | LS6 | Bolt-Ons | Intakes | Exhaust | Ignition | Accessories
Sponsored by:
Sponsored by:

Hard Starting

Thread Tools
 
Search this Thread
 
Old Jun 19, 2007 | 12:39 PM
  #1  
BAD LUK's Avatar
Thread Starter
Staging Lane
 
Joined: Jul 2005
Posts: 58
Likes: 0
Unhappy Hard Starting

Engine seems to be having a hard time starting lately. Not as bad in the morning as when its hot and it takes 5 sec or so of cranking before starting.
Sometimes when its cold, I will crank for the normal ~1 sec without it starting (it normally would) and crank it again right away and it will fire up.
Once it starts, it runs kind of rough (surging), but still seems to drive strong.

Another thing I noticed is that the temperature gauge shows the same as it always does after driving for a while, but it feels extremely hot under the hood.

I tried to search for "hard starting" in titles only and it gave me a bunch of non related threads.

Is there anything that I should know that is prone to causing this problem before I start tearing into everything?

118k+ mi, Stock wires, 100k+ mi on NGK-TR55IX plugs, changed fuel filter at 90K mi, stock water pump/thermostat, periodic sea foam treatment (put a can in the gas tank yesterday to see if maybe dirty injectors)

Just started acting like this the other day.
Reply
Old Jun 19, 2007 | 04:25 PM
  #2  
bad6as's Avatar
11 Second Club
iTrader: (17)
 
Joined: Mar 2005
Posts: 4,796
Likes: 0
From: Maryland
Default

i would change the plugs and wires and reset the pcm
Reply
Old Jun 19, 2007 | 07:00 PM
  #3  
NC98Z's Avatar
TECH Fanatic
iTrader: (1)
 
Joined: Sep 2003
Posts: 1,306
Likes: 0
Default

I'm having the same problem. I posted up in the diagnostic forum and this is beginning to sound like a tuneing issue.
Reply
Old Jun 26, 2007 | 08:59 AM
  #4  
BAD LUK's Avatar
Thread Starter
Staging Lane
 
Joined: Jul 2005
Posts: 58
Likes: 0
Default

I haven't done anything yet, although I have been noticing that when I go to start in the morning (cold start) the volt gauge will be halfway between 12 and 18 volts. After driving for a while and getting warmed up, the needle makes it's way to 12 and hovers there, sometimes going a little below. When the RPMs go up, the needle moves slightly above 12 but not always. I'm figuring the alternator is crapping out when it gets hot. Could this also be affecting the hard starting? By the way, should I get a replacement alternator or just go with a rebuild kit? I will definitely change the plugs and wires as well.
Reply
Old Jun 26, 2007 | 11:15 AM
  #5  
SIK02SS's Avatar
TECH Addict
iTrader: (11)
 
Joined: Feb 2005
Posts: 2,193
Likes: 2
From: Brunswick, GA
Default

same problem...but i have a vacuum leak i've neglected
Reply
Old Jun 26, 2007 | 11:27 AM
  #6  
KameleonTransAm's Avatar
TECH Enthusiast
iTrader: (1)
 
Joined: Jul 2006
Posts: 600
Likes: 0
From: JAX, FL
Default

Ok I'm very sorry to jump in but to one of the previous poster's how do you reset the PCM? I think my car needs this bad.
Reply




All times are GMT -5. The time now is 07:30 AM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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-9
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