SPONSORED LINKS

Crank sensor

Tiny
TUCKER ONE
  • MEMBER
  • 1997 CHEVROLET SILVERADO
  • 7.4L
  • V8
  • 4WD
  • AUTOMATIC
  • 150,000 MILES
Was starting hard, found the crank sensor was loose. Tightened and ran good until hot. Misfires and runs terrible, will not even make a hill. The more gas you give the worse it runs. Sometimes if you let up a little bit it will smooth out and pick up speed until you move the gas pedal then it falls on its face. Like it is running on four cylinders.
SPONSORED LINKS
Monday, January 23rd, 2017 AT 1:32 PM

3 Replies

Tiny
STEVE W.
  • MECHANIC
  • 12,977 POSTS
Change out the crank sensor. It may have been damaged while loose. Check the wiring as well. The symptoms you give sound timing related.
Was this
answer
helpful?
Yes
No
Monday, January 23rd, 2017 AT 1:57 PM
Tiny
TUCKER ONE
  • MEMBER
  • 1 POST
I think that you are right about it being timing related. I just do not know why it will come out of it at certain speeds and run really good when engine is cold. Any ideas on that?
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Monday, January 23rd, 2017 AT 2:15 PM
Tiny
STEVE W.
  • MECHANIC
  • 12,977 POSTS
Typical crank sensor issue is being temperature sensitive. If you have access to a scan tool you can actually look at the signal and see what it is telling the ECM to do with regard to timing and injector pulse.
Was this
answer
helpful?
Yes
No
Monday, January 23rd, 2017 AT 5:31 PM

Please login or register to post a reply.

Related Crankshaft Sensor Content

Crankshaft Position Sensor Replace Chevrolet
VIDEO
Crankshaft Position Sensor Replace Chevrolet
Instructional repair video
Crankshaft Sensor
GUIDE
Crankshaft Sensor
A crankshaft position sensor (CKS) is used to reference crankshaft rotation as the engine is running while supplying feedback data to the main computer. This sensor is...
VIEW MORE

Sponsored links