My van is very lazy taking off the check ingine light was on pulled two codes crank and cam sensors i change both check the wiring for correct voltage everthing checked out but problem is still there realy need some info.
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run fault codes and check for cam/ crank position sensor problem. Check that the cam shaft is turning (broken timing belt/chain). Check that the immobiliser is working as a disconnected battery ( starter replacement) will corrupt the CPU including the alarm systems . Use a code reader to reset the CPU.
Have you checked the wiring that goes to both the Crank and Cam sensors? Most of the time the wires are close to a heat source (ie: exhaust manifold) and the plastic covering starts to melt causing the cooper on wires to make contact and thus making engine stop, you will have to take off the protective covering as well as tape around the wires and inspect each and every one. Had same problem with Dodge caravan, it turns out the Crank Sensor plug wires were melted together. Good Luck.
Have the crank sensor checked, some times a generic scan tool or code reader will pull a code but list cam sensor and then when code is read with a gm tool it reads crank sensor, can you give me the code #? you may also have a wiring problem to cam sensor or faulty ecm or bcm. ( computer) engine control module) good day but still have the crank tested ,good day
does your ck engine light come on? check your fuses and relays first, in particular the auto shutdown relay, that relay supplies power to all the nessary components required to run the engine, if they are all good, ck for codes, a cam or crank sensor can cause a no start or poor run condition
If it where me I would start considering the only common part between all these effected systems. The ECM although the dealer should be able to say for sure. They have a machine that actually replaces the ECM and can simulate all the sensors. I had to say it but you may need to take it to a dealer for complete diagnostics and repair since the machine is a dealer only type machine.
Im assuming it is an engine that uses a timing belt. It sounds like the belt has jumped 1 tooth. if it only jumped 1 tooth than the computer will compesate the timing so it is possible the sensors will say they are ok. If it is a motor that uses a chain than it problaly needs a new gear/chain set.