Crank Angle Position Sensor

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number80
Posts: 17
Joined: Wed Jul 11, 2007 5:45 pm
Car: 98 240sx Shell

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A quick question for you OBD2 S14 guys. Remember please only respond if you have experience or really know. I'm getting different answers from my research I've done.

Do you need to run the Crank angle position sensor found on the S14 transmission bell housing? I got a S14 and running full OBD2 setup but the transmission is a S13 transmission so I don't have a plug to plug the crank sensor in.

Does anyone know if this will be an issue. I'm having some issue right now and tried many things but my car runs like crap. Maf, dizzy, plugs, and wires have all been swapped out but still no luck.

Here are the symptoms:

Has hard time idle, especially when it's not warmed up completelyMisfires or bogs when you give it some gasDrives very poor and will have to feather in the gas on a rolling startWhen I unplug the MAF sensor it idles better and I"m able to rev it conistantly but only up to 2500.when I plug it back on it seems worse like the above symptoms but just able to rev high.
Modified by number80 at 12:59 PM 12/22/2009


r3v_v3ng3
Posts: 868
Joined: Sat Feb 24, 2007 7:53 pm
Car: 91 fastback ka-t

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dont have experienced on it but i think you could of swap the bellhousing and still would retain the mounting hole for the ckp sensor. theyre basically the same transmission

number80
Posts: 17
Joined: Wed Jul 11, 2007 5:45 pm
Car: 98 240sx Shell

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Is your screen name "Vang"?

BTW i know you can just change out bell housing and add the sensor. I plan on doing that but just need to know if it's a waste of time or do I need it. I'm getting mixed answers.

rioredstang
Posts: 293
Joined: Sun Nov 30, 2008 3:47 pm
Car: 1993 240sx SCCA ITS
Location: Chattanooga, TN

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The crank sensor is only used for obd diagnostics. You do not need it to run.

You need to pull codes first. It may set a code for crank sensor. Does it blow black smoke? Pull the plugs, are they black(rich) or white(lean)?

If you unplug maf and it runs better it is a fuel problem. You need to look at FSM wiring diagram and back probe the maf meter signal return wire. Should read 1.0v to 1.2v at idle.


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