Archived Ckp ???? Info

[2-ND TIME]

Because of the problems that am having thinking of replacing the CKP does anyone have any info on the spec's of the crankshaft position sensor?????plaeaseeeeee. Thanks . still have the miss at idle and when running. Talked to a mechanic the other day and he said that some of the injectors have been spraying early at less then what they are suposed to so will try them to see if they are any good. They are only 8 hrs away to get to :{ Will post on how it goes. Would be good to get all these problems fixed. Talked to the service rep the other day and explained to him again that the pump started to go south when they replaced the filter at the 11 months with pressures of 5. 5 psi so this should get me a replacement lift pump. Except the other service rep told me not to bother the mechanic because he only gets paid for what he works on:-{}

 

[emjay]

What sort of specs are you looking for? Do you want to check the output? this would likely require an oscilloscope to gain any useful information, and even then you may not be able to see intermittent problems. There is one pulse per 10 degrees of crank rotation, with one pulse missing when the crankshaft is 60 degrees from #1 TDC. I have not personally measured the voltage from it, but given it is a magnetic pickup, the voltage should increase with speed.

 

[15w40]

The CPS is a Hall effect sensor that is powered by a 5-volt supply from the ECM. It consists of a permanent magnet and a Hall device. To put this in non-geek speak, the CPS is an integrated circuit that reads the teeth on a tone wheel on the crankshaft. The sensor puts out a saw tooth waveform if observed on an oscilloscope. The tone wheel on the crankshaft has a missing tooth positioned at top dead center on cylinder 1. This missing tooth tells the ECM where everything is on start-up and when the engine is running. The rest of the teeth indicate the crank angle to allow injection timing.



In my opinion all most people can measure is the 5 volts on pin “A” of the sensor, and ground on pin “B” of the sensor. If you have an oscilloscope or one of the Fluke oscilloscope meter, you can look at pin “C” for the signal to the ECM. This signal should be a series of pulses with 1 missing when cylinder 1 is at TDC.

 

[2-ND TIME]

CKP Thanks

Thank You for the information . Will try to use this weekend at the dealer. Has anyone heard of a missmatched ECM thinking that the standard trans is a automatic??????? Mine shutters as if it can't take a load without balking!!!! Thank You again.