LS3 engine idle problems
Thread Starter
2nd Gear
Joined: Feb 2011
Posts: 2
Likes: 0
LS3 engine idle problems
Hi ,
I have just built in my Corvette a LS3 crate engine,
When I start the car it has sometimes the right idle and sometimes a low running till dying idle.
When I have started and engine got the right idle , and put than the 400th automatic gearbox in drive (pure mechanical no sensors connected with the engine etc ) the idle get running
up between the 1500 and 1800 rpm.
The Mil (Malfunction Indicator Light) is glowing strong with making contact, and is glowing very very weak when engines running, while no any errors occur on the testbox
Anybody who can help?
T.I.A
I have just built in my Corvette a LS3 crate engine,
When I start the car it has sometimes the right idle and sometimes a low running till dying idle.
When I have started and engine got the right idle , and put than the 400th automatic gearbox in drive (pure mechanical no sensors connected with the engine etc ) the idle get running
up between the 1500 and 1800 rpm.
The Mil (Malfunction Indicator Light) is glowing strong with making contact, and is glowing very very weak when engines running, while no any errors occur on the testbox
Anybody who can help?
T.I.A
Team Owner
Joined: Sep 2005
Posts: 20,352
Likes: 568
From: Ventura County, Calif
So when you put a code reader on it you don't get any trouble codes?
Edit: Okay, you aren't providing enough information for people to help and there's no info in your profile.
What do you have? If you're trying to put an LS3 into an '05-'07 C6 then it won't run because you can't run an LS3 on an LS2 computer.
So lay out the details of what you have and what you're trying to do and what you are experiencing.
Edit: Okay, you aren't providing enough information for people to help and there's no info in your profile.
What do you have? If you're trying to put an LS3 into an '05-'07 C6 then it won't run because you can't run an LS3 on an LS2 computer.
So lay out the details of what you have and what you're trying to do and what you are experiencing.
Last edited by RicK T; Feb 27, 2011 at 02:43 PM.
Thread Starter
2nd Gear
Joined: Feb 2011
Posts: 2
Likes: 0
Thanks for quick reaction ,
I still had to get used my first day at this forum and even couldn't find my own question back again.
Also communication will be a bit slow because of the time difference , hope you will be patient
The Corvette is from 1968 and all electric stuf came complete with engine LS3 376/480
I bought on advice a predator in the USA to get control on the idle, but no results.
I amazed to see that without any (elektrical) contact with the gearbox, the idle get running up between the 1500 and 1800 rpm when its put in de D gearshift (with test driving its 30 to 40 mph)
I still had to get used my first day at this forum and even couldn't find my own question back again.
Also communication will be a bit slow because of the time difference , hope you will be patient
The Corvette is from 1968 and all electric stuf came complete with engine LS3 376/480
I bought on advice a predator in the USA to get control on the idle, but no results.
I amazed to see that without any (elektrical) contact with the gearbox, the idle get running up between the 1500 and 1800 rpm when its put in de D gearshift (with test driving its 30 to 40 mph)
Last edited by purplecorvette; Feb 27, 2011 at 04:17 PM.
