98 blazer 4.3 engine won't start code p0336, already replaced crank sensor

If you are revving an engine to 3000 rpm while in neutral then you are engaging the a rev limiter that is there to limit engine damage.

https://www.civicforums.com/forums/36-mechanical-problems-vehicle-issues-fix-forum/198513-rev-limiter-kicks-3900rpm.html

both codes are for crank position sensor problems. Change it.

If this is a diesel engine you probably have an air lock in the fuel system. It will need "bleeding" before it will start. If you have already tried bleeding the fuel system there may be an air lock in the injectors. If it still doesn't start I suggest you carry out a compression check because diesel engines need to be in good condition to start easily, especially in cold weather If it is a petrol engine, there could be problems with engine timing or ignition problems.

Hi there:

DTC P0336 - Crankshaft Position Sensor A Circuit Range/Performance


The crankshaft position sensor (CKP) is usually a two wire sensor: a signal and a ground. The CKP sensor consists of (usually) a permanent magnent sensor that is mounted in front of a reluctor (toothed) wheel mounted to the crankshaft. As the reluctor wheel passes in front of the crank sensor, an A/C signal is produced that varies according to engine speed. The PCM (powertrain control module) uses this A/C signal to interpret engine RPM. Some crank sensors are hall-effect sensors instead of permanent magnent sensors. These are three wire sensors, provided with voltage, ground, and signal. They too have a reluctor wheel with vanes and "windows" that change the voltage signal to the PCM, providing a RPM signal. I will focus on the former, since they are simpler design and more common.



The crankshaft reluctor has a specific number of teeth and the PCM can determine the position of the crankshaft using only this sensor's signature pattern. The PCM uses this sensor to also determine cylinder misfires by measuring the reluctor teeth locations in the CKP sensor signal. In conjunction with the Camshaft position sensor (CMP) the PCM can determine timing of spark and fuel injection. If the PCM senses a loss of CKP sensor signal (RPM signal) even momentarily, P0336 may set.


Symptoms of a P0336 DTC may include:
Intermittent stalling & no start
No start
MIL (Malfunction Indicator Lamp) illumination
Intermittent misfire


Potential causes of a P0336 code include:
Bad crank sensor
Broken reluctor ring (missing teeth, debris lodged in ring)
Reluctor ring dislodged/stripped from it's stationary location
Wiring harness chafing causing short
Wiring open in CKP circuit


Possible Solutions: Crankshaft sensor problems are at times intermittent and the vehicle may start and run for some time until problem occurs. Try to reproduce the complaint. When engine stalls or if the engine will not start and continue to run, then crank engine while observing RPM reading. If there is no RPM reading, check for a signal coming out of the crank sensor. Using a scope is best, but since most DIYers don't have access to one you may be able to use a code reader or the tachometer to check for RPM signal.


Visually check the CKP harness for damage or cracking in the wiring insulation. Repair as necessary. Make sure the wiring isn't mis-routed near high voltage spark plug wires. Check for loose connection or broken lock at the sensor connector. Repair as necessary. Obtain a resistance spec for the Crank sensor. Remove and check it. If it doesn't pass, replace it. If it checks out okay, check the reluctor ring for damage, broken teeth, or debris lodged in the ring. Make sure the reluctor ring isn't dislodged. It should be stationary on the crankshaft. Carefully repair/replace as necessary. Note: some reluctor rings are located in the bell housing of the transmission or behind the front engine cover and cannot be easily accessed.


If the vehicle intermittently stalls and after stalling you have no RPM signal and you have verified the wiring to the CKP sensor is good, then try replacing the sensor. If that doesn't take care of it, and you can't access the reluctor ring, seek help from an automotive professional.


Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

P0336 Crankshaft Position Sensor A Circuit Range/Performance.

Potential causes of a P0336 code include:

• Bad crank sensor
• Broken reluctor ring (missing teeth, debris lodged in ring)
• Reluctor ring dislodged/stripped from it's stationary location
• Wiring harness chafing causing short
• Wiring open in CKP circuit, good-day ! CKP=crankshaft position sensor. The Crankshaft position sensor also known as the crank position sensor is an electronic device used in an engine to record the rate at which the crankshaft is spinning. This information is used by the Electronic Control Module(ECM) to control ignition and fuel injection. The sensor system consists of a rotating part, typically a disc, as well as a static part, the actual sensor. good-day !
  
  
  

Sounds like changing the belt had nothing to do with the problem unless something was disconnected or damaged. Maybe you already know all the problem codes, but if not here is a list of them. Also, when you make a reapair on one of the codes you have to reset the codes. They stay in memory until you rested them. So if you reset the 336 and 341 codes my disappear. Reseting the codes doesn't have anything to do with not starting. Make sure nothing was accidentaly disconnected or damaged. The throttle sensor is on the throttle which is in the housing that the air cleaner connectes with. I'm unsure where the Knock sensor is located. The catalyst sensor is probably one of the oxygen sensors in the exhaust pipes, the farthest away from the engine. Your discription of how the care died sounds to me like the throttle sensor.
The problem you have withour having someone check all these item with a system scanner, is you don't know which is defective or if they all are. When you purchase any of these sensors, they are expensive and they are not returnable once you open the packaging. If it not a connection or broken item that is ovbious, I recommend you have a quilified shop check the problem. Guessing can cost a lot for no reason.

P0122 Throttle/Pedal Position Sensor/Switch "A" Circuit Low Input
P0325 Knock Sensor #1 - Circuit Malfunction (Bank #1 or Single Sensor)
P0336 Crankshaft Position Sensor "A" Circuit Range/Performance
P0341 Camshaft Position Sensor Circuit Range/Performance
P0420 Catalyst System Efficiency Below Threshold (Bank #1)

Good luck

Thanks for using FixYa.

Gaker

Try giving it a shot of starting fluid. You don't say if it's actually firing. If it tries or runs for a few seconds off of the starting fluid then try changing the fuel pump relay. It's inside of the glove box on the left hand side behind the little door. If that doesn't work it's most likely the fuel pump.

if no crank sensor by timing cover, some vehicles are controlled at the distributor. the 95-96 have sensor by cover . before 1995 this its controlled by distributor. there is no "crank sensor" on that engine the pick-up coil inside the distributor acts as the crank reference for that engine. have a good day !! 4.3 vortex engine.

Crank sensor is located on the engine front cover, down low. Yes... if this part were bad, this could be one of many reasons the car won't start. The bad part would usually set a diagnostic code (P0335 or P0336).

P0336 means Crankshaft Position Sensor A Circuit Range/Performance. Try replacing the crank sensor next.

http://www.check-engine-light.com