High Idle at Startup
#1
10-28-2007, 09:33 PM
High Idle at Startup
I have a 92 S10 blazer with the 4.3 non vortec engine. When i start it up, the idle is very high. And it shouldnt be that high. And ideas on what it could be??
#3
10-29-2007, 06:28 AM
RE: High Idle at Startup
ORIGINAL: rriddle3
If it's a 4.3L V6, it's a Vortec. How high is 'very high'? When does the idle speed drop down?
If it's a 4.3L V6, it's a Vortec. How high is 'very high'? When does the idle speed drop down?
#4
10-29-2007, 11:16 AM
RE: High Idle at Startup
I could have sworn I posted here... Anyway, the 'vortec' head design came about in the mid-80's. It wasn't until the early 90's when it became a marketing buzz word.
Anyway, back to the problem at hand. I guess we need a quantification to the term 'idles very high'. At what RPM does it idle at when cold. Does it drop down to a normal idle after it is warmed up? If it does, what is the idle RPM warmed up?
Anyway, back to the problem at hand. I guess we need a quantification to the term 'idles very high'. At what RPM does it idle at when cold. Does it drop down to a normal idle after it is warmed up? If it does, what is the idle RPM warmed up?
#5
10-29-2007, 07:28 PM
RE: High Idle at Startup
ORIGINAL: swartlkk
I could have sworn I posted here... Anyway, the 'vortec' head design came about in the mid-80's. It wasn't until the early 90's when it became a marketing buzz word.
Anyway, back to the problem at hand. I guess we need a quantification to the term 'idles very high'. At what RPM does it idle at when cold. Does it drop down to a normal idle after it is warmed up? If it does, what is the idle RPM warmed up?
I could have sworn I posted here... Anyway, the 'vortec' head design came about in the mid-80's. It wasn't until the early 90's when it became a marketing buzz word.
Anyway, back to the problem at hand. I guess we need a quantification to the term 'idles very high'. At what RPM does it idle at when cold. Does it drop down to a normal idle after it is warmed up? If it does, what is the idle RPM warmed up?
#6
10-29-2007, 07:36 PM
RE: High Idle at Startup
Again, do not confuse the change in the intake manifold bolt orientation with the start of the vortec cylinder head design. All 4.3L engines utilized vortec cylinder heads. Not that Wikipedia is a be-all and end-all source for accurate information, but they have it right in this case: GM Vortec Engine
#7
10-29-2007, 08:42 PM
RE: High Idle at Startup
Its not a Vortec...and i cannot tell what the RPM is because there is no tach. someone told me its either a sensor or a vacuum leak around the throttle body.
#8
10-29-2007, 09:05 PM
RE: High Idle at Startup
You are not listening, but what do I know...[&o]
Anyway, the TBI motors do have a problem with the throttle body base gasket. You can troubleshoot vacuum leaks by spraying some carb cleaner around the base of the throttle body.
Does the idle ever return to normal?
Anyway, the TBI motors do have a problem with the throttle body base gasket. You can troubleshoot vacuum leaks by spraying some carb cleaner around the base of the throttle body.
Does the idle ever return to normal?
#9
10-29-2007, 10:11 PM
RE: High Idle at Startup
sometimes it returns to normal on its own, sometimes it wont return to normal until i start driving.
and i always thought the vortec engine was the one with the intake manifold and fuel injected. im not too educated on my truck, ive been slacking
and i always thought the vortec engine was the one with the intake manifold and fuel injected. im not too educated on my truck, ive been slacking
#10
10-30-2007, 06:26 AM
RE: High Idle at Startup
ORIGINAL: Brandon31386
sometimes it returns to normal on its own, sometimes it wont return to normal until i start driving.
and i always thought the vortec engine was the one with the intake manifold and fuel injected. im not too educated on my truck, ive been slacking
sometimes it returns to normal on its own, sometimes it wont return to normal until i start driving.
and i always thought the vortec engine was the one with the intake manifold and fuel injected. im not too educated on my truck, ive been slacking
Kyle, thats something I didnt know I thought the two went hand in hand.
Thread
Thread Starter
Forum
Replies
Last Post
mcdevin1973
2nd Generation S-series (1995-2005) Tech
3
10-05-2014 02:52 PM
