Jeffx50
#1
Jeffx50
Hello all; I'm new to this forum, but I'm in real need of some experienced mech wisdom.
I went out to my 1992 Silverado 2500 (with 350 CID) this morning and when I fired it up it automatically started idling at about 1700 RPMs instead of the normal 650. Even though I shut it down to check it out it restarted in the same way. In gear it is running at about 1200 RPMs.
A mechanic for our company thought it might be an air leak around the throttle body base, but this is outside my field.
Anyone familiar with this problem?
Thanks in advance!
I went out to my 1992 Silverado 2500 (with 350 CID) this morning and when I fired it up it automatically started idling at about 1700 RPMs instead of the normal 650. Even though I shut it down to check it out it restarted in the same way. In gear it is running at about 1200 RPMs.
A mechanic for our company thought it might be an air leak around the throttle body base, but this is outside my field.
Anyone familiar with this problem?
Thanks in advance!
#3
Hi jeffx50,
Welcome to the Chevrolet Forums.
I'd start by running OBD trouble codes. Some times when a
code is tripped, the on-board system tries to compensate.
Welcome to the Chevrolet Forums.
I'd start by running OBD trouble codes. Some times when a
code is tripped, the on-board system tries to compensate.
Last edited by therewolf; September 19th, 2013 at 6:15 PM.
#4
Administrator
If it is a vacuum leak you may be able to narrow it down with a can of starter fluid, spray around the engine in various areas and listen for a change in the engine...
But a preliminary check of vacuum hoses is a good place to start...make sure they all fit snug, are not cracked or split...
Being its a 90's model you have a throttle cable, so make sure it moves freely and is not hung up... if it is the cable avoid using lubricant as it may free it up for a short while but the oils will collect even more crud and gum it up good...
But a preliminary check of vacuum hoses is a good place to start...make sure they all fit snug, are not cracked or split...
Being its a 90's model you have a throttle cable, so make sure it moves freely and is not hung up... if it is the cable avoid using lubricant as it may free it up for a short while but the oils will collect even more crud and gum it up good...