Engine is idling high and squeeling. What is it?

Asked by Jul 20, 2014 at 12:45 PM about the 1997 GMC Sierra C/K 1500

Question type: Maintenance & Repair

I just bought a 1997 GMC K1500 Z71 with 5.0 Liter V8 and 4l60e transmission. The problem i am having is it idles high, about 1300-1500 rpm when in any park, neutral, and even in drive. If i have it in drive and let off the break, the truck flies forward just like i was hitting the gas. I can get up to third gear and 40 mph without even hitting the gas. When i try to get up and go, the truck feels like it has no power. It accelerates very slow. When the engine is warmed up, im getting a really loud squeeling coming from the engine. I know its not the belts because i replaced them and the noise didnt go away. I pulled off the PCV valve while the truck was running and the idle goes down and the squeeling stops. whats weird is where the PCV valve connects on the valve cover is sucking in air when i take the PCV valve off. I am very new to this stuff so any advice helps. and i also dont know lot about engines. Just a normal guy trying to fix his truck. I did have somebody tell me it could be a vacuum leak or an intake manifold leak. Any ideas?

2 Answers

63,355

You need to look for bad vacume line,s,check engine bay at intake,for loose or bad hose,s.

thanks. I think im going to take it to a shop because im not even sure where all of the vacuum lines are suppose to be. Maybe they can just look at it and see if one is broken or missing

Your Answer

Add photo

Related Questions

Search GMC Sierra C/K 1500 Questions

GMC Sierra C/K 1500 Experts

#1 Andrew Olsen
Andrew Olsen
Reputation 140
#2 enginecreator
enginecreator
Reputation 130
#3 John Saffrahn
John Saffrahn
Reputation 120
View All

Related Models For Sale

Used GMC Sierra 1500
799 Great Deals out of 67,169 listings starting at $2,700
Used Ford F-150
2,247 Great Deals out of 209,704 listings starting at $1,499
Used GMC Sierra
31 listings
Used Dodge Ram 1500
448 Great Deals out of 11,375 listings starting at $700
Used Chevrolet C/K 1500
878 listings starting at $2,500
Used GMC Yukon
349 Great Deals out of 17,287 listings starting at $2,500
Used Chevrolet Tahoe
576 Great Deals out of 27,581 listings starting at $1,500

Used Cars For Sale