454 High Idle
#1
454 High Idle
Hey guys this is my first post on the forum. I tried searching but couldnt find what I was looking for. I have a 95 K2500 w 454 TBI in it. The truck seems to idle higher than I believe it should. Sometimes when I am on a wet surface or grass just putting it in gear spins the tires slightly. Are there some things I can check before I start throwing parts at it. This is my first TBI owned vehicle. What controlls the idle on this engine? Thanks guys
#3
Yes when I first start it up it goes up to almost 1500 rpms then it will go down to about 1000 but it still seems to high. In gear it is around 800 rpms. I can put the truck in drive and it will accelerate to 40 mph on its own in about 45 secs. I cant drive the truck in the winter without it being in 4wd or the truck will fishtail all over the place just off idle.
#5
Yeah try the starter fluid spray diagnoses. Spray around the intake in short bursts while its idling to see if it comes higher. This will tell you if you have a vacum leak.
#6
Not sure if you have a check engine light on, but it you do it could be an Idle Air Control Sensor. Believe it is code #35 on a scanner, "Cannot regulate idle RPM." This went out on my '94 Chevy, and '94 GMC.
#8
I checked for Vacum leaks today and found nothing. TBI gasket actually looks like its been replaced not to long ago. Is there a way to test the Idle Air Control valve? Engine light has not been on at all.