got two trouble codes from the computer, code 11 (crank angle sensor) and code 13 (coolant temp sensor). pulled the codes cos the car was idling around 1600-1800 after doing a thermostat/flush/fill.

I checked the coolant temp sensor and it looks like some water got in the wiring harness and corroded the connector. I disconnected the battery to clear the codes, filed down the contacts as much as I could, put some dielectric grease in there, hooked everything back up and I still idle around 1600-1800. since everything was so corroded, I'm gonna replace the coolant temp sensor anyway.

what about the CAS? can this code be a result of a malfunctioning coolant temp sensor? or did two parts simultaneously malfunction on me?

also I never realized how much of a major pain in the a** it is to flush and refill the cooling system on a 94 sentra. the first two times I added coolant I didn't get the air out, and it overheated. and the thermostat is in the back of the engine.... well, new thermostat and fresh coolant, I hope I'm set for at least 2 years.

any thoughts on the sensors?

Dan

 

Are you asking this about a maxima or a Sentra?

 

does that really make a difference? it's a nissan either way. I've tried automotiveforums and can't get anybody there with a shread of intellect. and right now I've got a car that overheats simply from idling and nothing else to drive. I've torn that thermostat housing apart 6 times in the past 2 days to reseat the thermostat and reseal the gasket, and even tried a new thermostat, spent over $50 on anti-freeze alone, I'm tired of guesswork trying to get this thing ready for winter. in addition to overheating it idles at damn near 1800 and the only thing I thought of doing was pulling trouble codes from the computer. I put a new coolant temp sensor in there, cleared the trouble codes, and the same problem is occurring, only now with no trouble codes. I'd like the help and advice from others who are more familiar with nissan's ignition systems before I park the thing until I can save up to have it taken to a shop. which is why I asked about the CAS and the coolant temp sensor on maxima.org. people here know more than I do. I am not an expert on cars. I went to school to be an electrician. if I can't do it, it's gotta go to a shop, and that's money I don't have. in no other car have I had this much trouble doing a freakin thermostat/flush/fill. it's been a once-and-done thing. of course, in those cars, the thermostat wasn't in back, six inches from the firewall and in between the AC lines, impossible to get to.... whoever thought of putting it there must have worked for GM before coming to nissan. it's always been put the thermostat in, put a little silicone on the gasket, bolt the housing on, wait overnight, done. I don't understand what I'm doing wrong here!

I don't mean to come off this way but it really frusturates me. each time I check the thermostat it's longer that I gotta wait for everything to dry. only to find out it's the same damn thing over and over again! and I gotta get this thing up and running by 9:00 tomorrow morning so that I can go to class.

Dan

 

when I disconnect the FICD the idle returns to normal. since I don't have a tach, I don't know exactly where "normal" is, but it sounds like it did before. plugging it back in makes it shoot back up.

turning the idle screw the whole way down brings it near where it was before, but it's just a temporary fix. I haven't heard any characteristic vacuum leak hissing sounds. code from the computer now is 55, normal.

I'm completely lost.

 

It still is not maxima related.