update on my LS1 problem
Thread Starter
Le Mans Master
Joined: Oct 2004
Posts: 5,269
Likes: 54
From: Orlando Florida
St. Jude Donor '05
update on my LS1 problem
This is going to be interessting for all of you that installed the LS1 engine:
My ses light was on for a while, the idle speed was a little unstable and returned only slowly back to 600rpm idle speed.... I thought it's the oxygen sensors, the injectors or maybe something more expensive....
Today I finally found the problem:
There is a short hose (approximately 1.5" long) between the vacuum tubing that goes to the idle air control motor under the throttle body. The guys at chevy obviously tried to safe some pennies on the material (I believe it was rubber at some time). It deteriorated and hardened. I found a hole in this hose, about 1/4" diameter... unmetered air entered the manifold, the air/fuel mixture was way too lean, the computer tried to correct for it and added fuel and so on.... as soon as I touched the hose it broke in pieces
Fortunately I had some hose in my garage...
I installed a new hose (better quality, $1 per foot from AutoZone
and now it runs better than ever before...
:happy:
My ses light was on for a while, the idle speed was a little unstable and returned only slowly back to 600rpm idle speed.... I thought it's the oxygen sensors, the injectors or maybe something more expensive....
Today I finally found the problem:
There is a short hose (approximately 1.5" long) between the vacuum tubing that goes to the idle air control motor under the throttle body. The guys at chevy obviously tried to safe some pennies on the material (I believe it was rubber at some time). It deteriorated and hardened. I found a hole in this hose, about 1/4" diameter... unmetered air entered the manifold, the air/fuel mixture was way too lean, the computer tried to correct for it and added fuel and so on.... as soon as I touched the hose it broke in pieces
Fortunately I had some hose in my garage...
I installed a new hose (better quality, $1 per foot from AutoZone
and now it runs better than ever before...:happy:
Le Mans Master
Joined: Sep 2000
Posts: 9,078
Likes: 7
From: DFW TX
Cruise-In VII Veteran
St. Jude Donor '07
Sounds like a easy fix and you didn't have to pull the motor to fix it. I usually go to the extreme fixing some of the smallest problems.
Post some pics of that bad boy...
Post some pics of that bad boy...
Racer
Joined: Jul 2004
Posts: 492
Likes: 0
From: Burlington Ky
Cool beans, Red, glad you found it.
Bud, I catch myself doing the same thing sometimes. Once replaced the injector nozzles on a Perkins when the air filter was clogged.
OK, I probably shouldn't admit stuff like that.
Bud, I catch myself doing the same thing sometimes. Once replaced the injector nozzles on a Perkins when the air filter was clogged.
OK, I probably shouldn't admit stuff like that.
