i have a CEL telling me my crank & cam position sensors are faulty which naturally is causing a misfire.....i replaced both sensors.....and it's still telling me that they're faulty.....i unplugged the battery as well....and still nothing.....the only other thing i can think of is a wiring issued somewhere.....but i wanted to see if it could be anything else before i start pulling wires again....already did a search and nothing solid came up......thanks...
WHEN I'M GOD, EVERYONE DIES
Hmmm, as rare as it may sound, you may have 2 NEW bad sensors! It has happened b4. Take them back and see if they will replace them for free, if they will, just change them out real fast, and if you are still having the same problem, then I would go to wiring.
98z24, lowered 2", aem intake, cat-back striaght pipes!, cop ligths in the front and rear, 18" liquid metal's, primer black, tint, full audio and video.
true...that wouldn't be impossible....and they are under warranty....so it definitely couldn't hurt.....thanks....
WHEN I'M GOD, EVERYONE DIES
Or maybe you actualy have a "crank/cam correlation error"
Quote:
Or maybe you actualy have a "crank/cam correlation error"
but wouldn't that have more to do with timing???.....i know i timed the crank and cams where they need to be when i put her back together....hell...it's kind of hard not to.....
i had to splice in a new electrical connect for the cam sensor due to a fire...but all the wires matched....only difference was the wires on the connect was a bit thicker....but i don't see that being a problem.....and even if it was....don't see how that would effect the crack sensor....considering they have separate trouble codes.....
WHEN I'M GOD, EVERYONE DIES
these are the codes that are coming up...
P0336 Crankshaft Position (CKP) Sensor A Performance
P0341 Camshaft Position (CMP) Sensor Performance
and now this one....
P0300 Engine Misfire Detected
WHEN I'M GOD, EVERYONE DIES
The crank/cam corellation can be off for any of number of reasons even if teh timing is dead nuts on.
Both your crank and cam signals go through the ICM. Crank goes through the PCM first i believe. Maybe start by checking all of your wring between the PCM, ICM, and the sensors.
actually the crank sensor goes to the ICM....and the cam sensor goes to the PCM.....but yeah....i pretty much figured that's what i was going to end up doing.....just wanted to see if there were more possible reasons for this problem....thanks....
WHEN I'M GOD, EVERYONE DIES
Ok, heres your answer, cause i just got doing mine as well, and didn't relaize this, this comes stright from gm.
CKP System Variation Learn Procedure
Notes
IMPORTANT: A Crankshaft Position (CKP) system variation learn procedure must be performed any time a change is made to the crankshaft sensor to crankshaft relationship. Changing the crank sensor to crankshaft relationship will not allow the Powertrain Control Module (PCM) to detect misfire at all speeds and loads accurately, resulting in a possible false misfire Diagnostic Trouble Code (DTC) being set.
Removing a part for inspection and then reinstalling the same part is considered a disturbance. A false DTC P0300 could be set if the CKP position variation learn procedure is not performed.
The learn procedure is required after the following service procedures have been performed, regardless of whether or not DTC P1336 is set:
PCM replacement
Engine replacement
Crankshaft replacement
Crankshaft position sensor replacement
Any engine repairs which disturbs the crankshaft/harmonic balancer to the crankshaft position sensor relationship
A fully warmed-up engine is critical to learning the variation correctly. If a valid learn occurs, no other learns can be completed on that ignition cycle.
If the engine cuts out before the specified learn procedure engine speed or at normal fuel cut-off RPM, the PCM is not in the learn procedure mode. Review the crankshaft position system variation learn procedure and re-enable the learn procedure. Verify that the scan tool displays Test in Progress.
CAUTION: Before performing the Crankshaft Position System Variation Learning Procedure always set the vehicle parking brake and block the drive wheels in order to prevent personal injury. Release the throttle immediately when the engine starts to decelerate in order to eliminate over revving the engine. Once the learn procedure is completed, the control module will return engine control to the operator and the engine will respond to the throttle position .
IMPORTANT: The battery must be fully charged and in good condition. The scan tool connection at the data link connector (DLC) is clean and tight before starting the crankshaft position system variation learn procedure.
Close the hood.
Block the drive wheels and set the vehicle parking brake.
Put the vehicle in Park or Neutral.
Turn all the accessories OFF.
Install a scan tool.
Start and run the engine until it is at the normal operating temperature of 74°C (165°F) .
With the engine still running, enable the crankshaft position system variation learn procedure with the scan tool.
Press and hold the brake pedal firmly. Accelerate to wide-open throttle (WOT). Release the throttle when fuel cut-off is achieved.
Verify with the scan tool that the crankshaft variation has been learned.
A fully warmed up engine is critical to learning the variation correctly. If a valid learn occurs, no other learns can be completed on that ignition cycle.
If the engine cuts out before the specified learn procedure engine speed or at normal fuel cut-off RPM, the PCM is not in the learn procedure mode. Review the crankshaft position system variation learn procedure and re-enable the learn procedure. Verify that the scan tool displays Test in Progress.
If the variation will not learn, perform this procedure up to 10 times.
hope this answers your question on that.
