SPONSORED LINKS

Will not run smoothly

Tiny
JOHNNY COLLINS
  • MEMBER
  • 2003 CHEVROLET SILVERADO
  • 4.3L
  • V6
  • 2WD
  • AUTOMATIC
  • 180,000 MILES
Truck stopped running while driving down the road, towed it home. Put a complete tune up on it still idle bad a buddy came over and scanned it he said that the crankshaft sensor was bad.I replaced it still will not idle smoothly. Why?
Monday, May 15th, 2017 AT 1:29 PM

2 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Try cleaning throttle plate on both sides and IAC hole with choke cleaner. This may be an injector problem as GM changed a lot of them due to poor running qualities. Also check for a vacuum leak. Like hoses. O-ring leaks around plenum and scan for codes.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Monday, May 15th, 2017 AT 3:48 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Hello,

If the rough idle seems to be consistent then I would do a compression test to see if you have one low cylinder.

https://www.2carpros.com/articles/how-to-test-engine-compression

Please run this test and get back to us so we can continue helping you.

Cheers, Ken
Was this
answer
helpful?
Yes
No
Thursday, May 18th, 2017 AT 10:56 AM

Please login or register to post a reply.

Related Engine Runs Rough Content

Code Read Retrieval/Clear Chevrolet
VIDEO
Code Read Retrieval/Clear Chevrolet
Instructional repair video
Check Engine Light
GUIDE
Check Engine Light
Why is my check engine or service engine soon turned on? In this guide we talk about what this is associated with this notorious light, what it is used for and what you...
VIEW MORE

Sponsored links