1996 GMC Sierra CRANKSHAFT POSITION SENSER ON TIMING COVER

TODDWYO76

MEMBER
1996 GMC SIERRA
V8
4WD
AUTOMATIC
104,000 MILES

TO THE TOP MECHANICS,
HI, MY NAME'S TODD CORBETT. I OWN THIS BEAUTIFUL TRUCK FOR TWO YEARS. I GOT IT FROM MY LATE FATHER. SO, FOR THE LAST ONE YEAR, MY TRUCK'S PERFORMANCE WAS GETTING WORSE AND I FOUND OUT THAT THE CPS IS GETTING BAD. I NEED TO REPLACE IT FOR A NEW ONE, HOWEVER, BECAUSE THE GAP IS IMPORTANT FOR THE PERFECT PERFORMANCE.
I REPLACED THE CPS PART AND MY TRUCK WON'T START, THEN I RE-ADJUSTED IT FOR A RIGHT GAP. STILL, IT WON'T START. I KNOW THAT THE GAP IS SUPPOSED TO BE.50" PRECISELY, BUT HOW CAN I MEASURE IT FROM INSIDE THE TIMING COVER?

CAN YOU PLEASE DESCRIBE A WAY TO MEASURE THE GAP OF CPS INSIDE THE TIMING COVER?

THANK YOU, TODD

2 Replies

BMRFIXIT

MECHANIC
19,053 POSTS

I do not know what is the problem in your
but to answer your question on crank sensor adjustment if your crank sensor in the front of the engine that means you have a distributor and the crank sensor is not adjustable
I even went back to my book and checked to see if I missed something and it is stated that too
so for no start condition check for codes and check coil if no spark
CRANKSHAFT POSITION SENSOR

On engines with distributor, Crankshaft Position (CKP) sensor is located in front engine cover and is perpendicular to crankshaft target wheel. Air gap between sensor and target wheel is preset and not adjustable. The sensor must be exactly perpendicular to target wheel with no alteration in air gap.
On engines with distributorless ignition, CKP is a magnetic sensor which protrudes into the block within about.050" from the crankshaft reluctor