Conversions & Swaps LSX Engines in Non-LSX Vehicles
Sponsored by:
Sponsored by:

How many seconds does it take before your LS1 starts?

Thread Tools
 
Search this Thread
 
Old 10-08-2017, 08:37 PM
  #1  
Teching In
Thread Starter
 
72farmer's Avatar
 
Join Date: Jul 2017
Posts: 23
Likes: 0
Received 0 Likes on 0 Posts
Default How many seconds does it take before your LS1 starts?

I have a 02 5.3 Silverado engine in my 87 c10 truck.Sometimes it cranks up to 4 seconds before it fires up.Other times it fires up in under a second.Seems like it always fires fast the first time it is started each day.
It don't seem to help if I prime it twice instead of 1 time.
Is this normal?
Old 10-09-2017, 12:08 AM
  #2  
TECH Fanatic
iTrader: (7)
 
CattleAc's Avatar
 
Join Date: Dec 2007
Location: Dakota Territory
Posts: 1,483
Received 306 Likes on 206 Posts

Default

Fuel pressure regulator is probably leaking...

Start it, then shut it off and pull the vacuum line off of the regulator, and look for raw fuel.
Old 10-09-2017, 09:24 AM
  #3  
Teching In
 
2slowTA's Avatar
 
Join Date: Jan 2016
Posts: 45
Likes: 0
Received 0 Likes on 0 Posts
Default

Or fuel pump acting up. Hopefully it's the regulator.
Old 10-11-2017, 06:43 PM
  #4  
Staging Lane
iTrader: (2)
 
dlabooda's Avatar
 
Join Date: May 2011
Location: Ft Worth, TX
Posts: 77
Likes: 0
Received 1 Like on 1 Post

Default

Rent a fuel pressure test kit from the parts store and watch what the pressure does after you prime it. My Chevelle had a hell of a time starting and I lived with it for a year before finding out the hose coming off the in the tank fuel pump was leaking.
Old 10-13-2017, 01:03 PM
  #5  
Teching In
 
2slowTA's Avatar
 
Join Date: Jan 2016
Posts: 45
Likes: 0
Received 0 Likes on 0 Posts
Default

Had that^^^^^^happen too. The output hose from the pump developed a split at the nipple so, the initial prime wasn't good. Once it started, it seemed to run ok untill upper rpm. It didn't "pull" as hard as I thought it should and had a small, random hitch. Once I figured this out, it was a different car.



Quick Reply: How many seconds does it take before your LS1 starts?



All times are GMT -5. The time now is 06:13 AM.