Crank shaft sensor
Thread Starter
Intermediate
Joined: Mar 2018
Posts: 48
Likes: 2
Crank shaft sensor
I I’m gonna try and make a long story short. Did a complete cam swap with all the goodies. Left the bottom end factory. Now, after everything, the initial start up went fine. It started fine and obviously idled rough with no tune. I shut it off and this is where the problem starts. Went to start it again and it just spun over. I seen an engine light come on. Checked it and it said crank shaft position sensor. After some investigation, I found one of the wires got pulled from the plug itself. I went ahead and put a new sensor in too and replaced the plug in as well. Now, still getting the code. If I read correctly elsewhere, you have to relearn the sensor? I haven’t done a lot of research but from what I glanced at, the car needs to idle to relearn it. Well I can’t get it to start because of this code. Can anyone point me in the right direction of where to start?? Thanks in advance !!
Thread Starter
Intermediate
Joined: Mar 2018
Posts: 48
Likes: 2
this is what I thought too.... P0335 is what I’m getting. Both the connector and sensor are brand new now. Still no start. Everything looks good including the ground that grounds these specific wires... so I’m just kinda lost right now ...
Burning Brakes
Joined: Nov 2016
Posts: 1,192
Likes: 438
From: San Dimas CA
Get out your multimeter.
+5 VDC on CPS connector pin 3 comes from the ECM.
Ground on CPS connector pin 2 comes from the ECM.
Pulses on CPS connector pin 1 when cranking. Look for some kind of change in voltage when you start cranking. Really need a scope for this.
+5 VDC on CPS connector pin 3 comes from the ECM.
Ground on CPS connector pin 2 comes from the ECM.
Pulses on CPS connector pin 1 when cranking. Look for some kind of change in voltage when you start cranking. Really need a scope for this.
Thread Starter
Intermediate
Joined: Mar 2018
Posts: 48
Likes: 2
i’ll get this info today!
Thread Starter
Intermediate
Joined: Mar 2018
Posts: 48
Likes: 2
So with the multi meter, both my wires stay at a solid 4.90-4.98. Cranking and just sitting. If I hold it to the floor it will backfire. I know I’m getting plenty of gas and I have fire. Just still not starting... please help...
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Le Mans Master
Joined: Oct 2014
Posts: 8,673
Likes: 2,728
From: Atlanta GA
