I had my crank sensor and cam sensor changed last March, supposedly it went out in August and was changed again.
A month after I had my sensors changed again, and my car died again and wouldn't start again. The new shop that changed my sensors the second time, told me the computer went bad and I needed a new one. So, after 5-6 weeks of waiting, my car still isn't fixed and I already paid almost 1300.00 and now their telling me, because the computer was messed up, it messed up my timing chain and that I needed a new one. Is that possibly true? They said they would get back to me on how much it's going to cost, and I've been waiting since Dec. I'm suing the auto shop for deceptive busin
Experienced mechanics share their insights in answering this question :
Hi, we will be happy to help how we can. Your vehicle should not have been handled like that. I can’t imagine the level of stress you’ve been enduring. A faulty computer will not cause a timing chain to go bad, unless it has variable valve timing. Your vehicle does not have variable valve timing. I would ask them to explain exactly what faults the timing chain has that makes replacement required. Is it stretched, broken, or is it just off of timing. These are questions that should be asked. After all you’ve been through with them they were should be willing to give you some type of proof that the vehicle needs what they’ve specified. It sounds like they may be throwing parts at the vehicle without actually diagnosing it, hoping it will fix your problem. Since you already have a lawyer on the case I believe that will be the best thing. You may want to check reviews from other customers to see if they have similar experiences to help strengthen your case.
How to Identify and Fix Common car Problems ?
Our sources include academic articles, blog posts, and personal essays from experienced mechanics :
Unfortunately, there`s no way to reset a camshaft position sensor. If you`re having camshaft issues (check engine light on, acceleration trouble, sputtering and stalling, etc.), you`ll have to replace the part entirely.
You don`t need to reset it, once the engine turns over it will send the information to the ECM and the ECM will be ready to start the engine.
The crankshaft position sensor monitors the position and speed of the crankshaft and other parameters that play an important role when starting the engine. If the crankshaft position sensor is having a problem, the vehicle may have intermittent starting issues or not start at all.
The most common failure is the crankshaft position sensor. These fail much more frequently than the cam sensor and will cause a no start. It can also occur if the timing belt broke or jumped a tooth. I would do a compression test also to see if there is low compression.
After you`ve replaced the camshaft sensor, be sure to take your car to a qualified mechanic and ask them to reprogram it using a OBD-II scanner. Doing so will clear any error codes and make sure that the engine computer is getting accurate signals from the new sensor.
A camshaft position sensor can`t be reset. It either works, or it doesn`t. And, when it doesn`t, it has to be replaced. You`ll know you`re having camshaft sensor issues when your check engine light is on, the car has difficulty accelerating, or is stalling.
In rare cases the engine may misfire or go into “reduced power” or “limp mode” especially under high RPM/load situations Additionally, omission of the relearn process could cause the vehicle to be unable to pass an emissions test due to incomplete or failed misfire monitor.
A bad camshaft position sensor can rarely be repaired and reset (“relearned”); instead, plan on replacing it. Replace a bad sensor by disconnecting the faulty unit, getting a matching replacement, and installing it in the same way.
Crankshaft Variation Relearn Procedure must be performed if: • ECC was reprogrammed. Crankshaft position sensor has been replaced. ECC has been replaced. Follow the relearn procedure outlined below: 1.
Bad Sensors
One common culprit for this problem is the crankshaft position sensor, which measures the position and speed of the crankshaft. The computer uses the information from this sensor to know when to fire the spark plugs. If the sensor isn`t working, the spark plugs won`t fire, keeping the engine from starting.
A failing camshaft position sensor begins losing its ability to quickly transfer data. Mismatched fuel delivery and ignition timing, even if off by a few milliseconds, will cause your vehicle to sputter, accelerate poorly, lack power, stall or even shut off.
During the four-stroke combustion cycle (intake, compression, power and exhaust) the crankshaft turns twice — moving each piston up and down twice — while the camshaft turns once.
A camshaft position sensor can`t be reset. It either works, or it doesn`t. And, when it doesn`t, it has to be replaced. You`ll know you`re having camshaft sensor issues when your check engine light is on, the car has difficulty accelerating, or is stalling.
Your car`s ECU might still be coded with the old camshaft position sensor. Your car`s PCM might be faulty. There may be a faulty starter motor causing the issue. The Reluctor wheel might be damaged or malfunctioning.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
I had my crank sensor and cam sensor changed last March, supposedly it went out in August and was changed again.
ANSWER : Hi, we will be happy to help how we can. Your vehicle should not have been handled like that. I can’t imagine the level of stress you’ve been enduring. A faulty computer will not cause a timing chain to go bad, unless it has variable valve timing. Your vehicle does not have variable valve timing. I would ask them to explain exactly what faults the timing chain has that makes replacement required. Is it stretched, broken, or is it just off of timing. These are questions that should be asked. After all you’ve been through with them they were should be willing to give you some type of proof that the vehicle needs what they’ve specified. It sounds like they may be throwing parts at the vehicle without actually diagnosing it, hoping it will fix your problem. Since you already have a lawyer on the case I believe that will be the best thing. You may want to check reviews from other customers to see if they have similar experiences to help strengthen your case.
check engine light code said replace cam sensor will not crank with new sensor but wiil crank with old sensor
ANSWER : Hi there:
That is a very off symptom you’re describing. Without being there to phyisicaly inspect your Nissan, the only thing I’d guess that might be causing this is if the cam sensor you installed was the incorrect one, or perhaps the electrical harness created an electrical fault; causing the ignition relay to not send a signal to the starter relay. You might want to have a professional mobile mechanic complete a car is hard to start inspection; so they can determine why you’re having this issue.
Ok my car will not start it had the same issue a week ago I changed the cam and crank sensors. It cranks but wont start …HELP!
ANSWER : Prior to performing diagnostics be sure you have a fully charged battery that passes a load test. Then, confirm that the engine immobilizer system (security system) is not activated thus preventing the car from starting. To temporarily override the immobilizer system, see these instructions.
Be sure there is adequate fuel in the fuel tank and that the fuel is not old. Check for adequate fuel pressure, injector operation, and a spark at the spark plugs. Basically, if the starter motor is turning the engine over rapidly, at sufficient RPM, but the engine does not catch and run, that means that there is an ignition, fuel, air induction, or mechanical fault in the engine that will have to be repaired. Strictly speaking, you should first check engine compression in the cylinders because if there is no, or inadequate, compression the engine won’t run under any circumstances. If compression is found to be within factory specifications, and there is fresh fuel being delivered by the injectors (not just "to" the injectors) and the ignition system is working, that means that the air fuel ratio of the mixture delivered to the cylinders is so far off that the mixture just won’t ignite. Such could be due to a big vacuum leak, an air induction fault like a stuck idle air control valve or, considering fuel, could be due to a failed temperature sensor that must be working properly to signal the PCM to enrich the mixture on cold start. Other common faults are defective spark plugs or a defective coil. Regardless of the underlying cause, if you request a no start diagnostic the responding certified mechanic will get the problem diagnosed and repaired for you promptly. Please let us know if you have further concerns or questions as we are always here to help you.
take long time to start first in the morning already change fuel regulator crank sensor and cam sensor spark plugs and wires
ANSWER : Hi there. It’s possible that you’ve got a problem with the cold start injector on your Cadillac. The cold start injector is also known as the cold start valve. The part is located on the cold air intake, which is found on the intake manifold. It is a fuel injector that is controlled electronically. The cold start injector works only when the engine has a cold start, or when the engine’s temperature is below a certain point. When this happens, a computer tells the injector to inject more fuel into the mixture that goes through the cylinders to the engine. You might want to have a mobile mechanic come by your location and complete a car is hard to start inspection to pinpoint the source of this issue and recommend the right repairs.
My truck won’t start. I put a new fuel pump, cam shaft sensor, cleaned my crank sensor, and put a new battery in it. It will crank but not start.
ANSWER : Check the exhaust system for any leaks before the oxygen sensors. This can contribute to having more oxygen in the exhaust stream causing the sensors to register a false reading. If there is no leaks in the exhaust, then check the engine for any vacuum leaks. Look at all of the vacuum lines, the intake gaskets, and the brake booster. A vacuum leak will cause the engine idle to accelerate fast and also cause the engine to stall when the computer brings the idle down. If you need further assistance with your engine stalling, then seek out a professional, such as one from Your Mechanic, to help you.
I just replaced my crank and cam sensor and car still dont start
ANSWER : You should check to see if your vehicle has jumped timing. Have a mechanic verify that the camshaft timing did not jump after scanning and looking at the crankshaft sensor data to verify it is giving a signal. If it is giving a signal, then the cam and crank signals are way off and causing the wrong ignition timing. If you need to have a local expert come check this problem for you, a certified technician from YourMechanic can come to your car’s location to diagnose the hard starting issue and pinpoint the correct fix.
I did replace the heater core and two sensor the crank sensor and camshaft sensor it didn’t work can it be the computer
ANSWER : If the check engine light is on, what kind of codes is the system detecting? Do you have spark at the plugs? If you have spark, does spritzing some starter fluid give you a momentary startup? If so, there is a fuel issue. More symptoms and information on the car’s behavior before and after the parts you replaced would be very helpful. At this point, I would recommend an inspection from YourMechanic.com to diagnose this car starting problem, get an accurate assessment of damage and cost estimate for repairs. YourMechanic.com can dispatch a mobile, professional mechanic to your location to help you get your car up and working again.
O2 sensors changed, but check engine light still showing code after clearing it I checked fuse. Wires are good and used Denso OE.
ANSWER : Depending on what the code was for will determine if the oxygen sensor was to be replaced. If the conditions were for a rich or lean mixture and it said oxygen sensor, then the spark plugs and wires could need replaced if its a rich reading or the fuel injectors could be clogged or not working if its a lean mixture. If the code said that the oxygen sensor was bad, then check the harness and see if there is a break in the wiring or a short to ground in the wiring from the oxygen sensor to the main harness. If you need further assistance with your check engine light being on, then seek out a professional, such as one from Your Mechanic, to help you.
