darkangel23 Posted May 19, 2007 Share Posted May 19, 2007 Hey guys I have a 1981 280zx Turbo, what happens is my car will start and then I am able to drive it about 500 feet before it just dies. I took the car to a nissan dealer and they are telling me that it is the crank position sensor. I was just wondering if that sounds like what it could be and how hard it is to change out and if any could give me some instructions on how to do it. Quote Link to comment Share on other sites More sharing options...
MaTTSuN Posted May 19, 2007 Share Posted May 19, 2007 whats a crank position sensor? do they mean the CAS crank angle sensor? or are they telling you the muffler bearing is gone too have you greased your muffler bearings? Quote Link to comment Share on other sites More sharing options...
darkangel23 Posted May 19, 2007 Author Share Posted May 19, 2007 It's actually called a crankshaft position sensor here is a picture of what one looks like Click Here This is how one website describes what the crankshaft position sensor does The CRANKSHAFT POSITION SENSOR is used to detect engine speed It allows the computer to change injector openings with changes in engine rpm. Quote Link to comment Share on other sites More sharing options...
MaTTSuN Posted May 19, 2007 Share Posted May 19, 2007 im pretty sure your way off that is the pick-up for the ignition when the little nubs on the chopper wheel go by it tells the computer where to put the spark it has nothing to do with the injectors, its all for ignition control i think your blinker fluid might be low JK hehe Quote Link to comment Share on other sites More sharing options...
darkangel23 Posted May 19, 2007 Author Share Posted May 19, 2007 LOL I could be Im just going off what the dealer has told me and the pictures I have found on the internet either way I just need to know if it is very hard to change out that part or what you guys think could be the problem in the first place Quote Link to comment Share on other sites More sharing options...
MaTTSuN Posted May 19, 2007 Share Posted May 19, 2007 well if that is the problem then allot of guys upgrade to the later model 82-83 distributor that has the CAS in the dizzy do a search for 83 dizzy should set you in the right direction i have an 81 as well and had nothing but problems im going to go megasquirt and be done with all the old stuff go through your wirering and make sure everything connected right these old cars have old wirering and can be tricky Quote Link to comment Share on other sites More sharing options...
joe d. Posted May 19, 2007 Share Posted May 19, 2007 how long will the car stay running if your not driving it. Quote Link to comment Share on other sites More sharing options...
BobbyZ Posted May 19, 2007 Share Posted May 19, 2007 The CPS on my nissan pathfinder is mounted at the top of the transmission bellhousing. I know because we broke it when we pulled the transmission. The only way you could get to it is by pulling the transmission, even then you cant see it until you have already broken it... lol. I am not really sure what it would be for on your car. On some cars a CPS is used to electronically control the spark instead of a distributor, but I really dont think that is true on your car. The spark advance may be controlled by the CPS which could cause some running problems, not really sure though. As far as replacing it yourself, it totally depends on where it is. No matter what it is not a technical job. You just have to find it, pull out the old one, and plug in the new one. Really shouldn't be too hard, but it might be a huge PITA to even get access to it. Quote Link to comment Share on other sites More sharing options...
darkangel23 Posted May 19, 2007 Author Share Posted May 19, 2007 Joe the car will usually run for about 10 minutes if it is just idling and then will shut off then I will try to crank it over and it won't if I let it sit for about 5 minutes I will try to crank it over again and it will start up. Quote Link to comment Share on other sites More sharing options...
MaTTSuN Posted May 20, 2007 Share Posted May 20, 2007 its a crank angle sensor CAS and its easy to replace its right in the front of the engine. If thats even the problem but shouldnt take more then 20 min to replace it Quote Link to comment Share on other sites More sharing options...
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