i have a 91 NA, for some reason all kinds of stuff started happening within the same week. (1) every time i start to slow down, right before i stop the car starts to stall. funny thing about this is that i am in nuetral once i step on the brake. (2) my speedometer is acting funny. before it flicker while im driving, now it just stays at 0mph. (3) car starts to over heat. i just checked my coolant and oil, and still the car over heats. also the "check engine" light goes on. (4) after 2500 rpm, the car sounds like it is weezing during acceleration. seems like the car is trying to hard. this really isnt a joke. ive recently been a z owner, and so far things dont look to good. could these 4 things have any relation with each other since they all happened at the same time? please i am in desperate need of knowledge to this problem.

 

well with problem number 4 if the rpms dont seem to match speed...exp..your rpms say about 4000 and your speed says 20 mph your clutch is almost gone. As far as the over heating have you checked your thermostat mabye its going bad also. As far as your speedometer check your fuses..tell you what im at work right now but when i get home today after work ill check my tech book on the car and ill find out what it says about your speedometer...all i can say is for now just take it to key or courtesy nissan and have them check it out it might cost a little but if you know some of the guys that work there they will do a full engine check for free!! anyways good luck man and ill check my books when i get home
later

mike

90 3zx2 n/a 2+2
shes a work in progress!

 

Have your speed sensor, on the transmission tested. Mine failed right before I bought the car and it ended up casuing additional problems within the speedo head. It is a whole lot cheaper to replace the speed sensor than to have to do both that and the speedo head as well. I had the exact same symptoms as you, stalling, speedo acting funny, dropping to 0 etc.

The speed sensor is a mechanical to DC converter mounted on the tranny housing, you'll have to have someone test it for you .

..Dan

 

wow thanx...i was completely off but now i know just incase it starts to happen to mine...thanx i appriciate it...

mike

90 3zx2 n/a 2+2
shes a work in progress!

 

Just to clarify that was only directed towards the 'speedo acting strange and the stalling' The other symptom I had was in my steering. Once the speedo Head electronics fail, there is a ground signal fed back to the ECU which also affects the variable assist steering, Real crazy when you happen to be in the middle of a hard corner!!!

..Dan

 

well this is what happened, it took my car earlier today to the dealershop. from what it seems, the head mechanic had said two words "speed sensor". well that would explain the speedometer and as well as the tight steering in which i forgot to metion earlier. as for the stalling and weezing accelaration problems, a buddy of mine had said maybe the fuel injectors need cleaning. im still doubtful about that but im gonna try a bottle of injector cleaner anyways. finally for the over heating, i too was informed (also by the members of z driver .com) that the thermostat needs to be changed.
well other than all these problems, thank you guys for the extra help and information. i'll keep you guys posted soon on the condition of my Z as soon as i can. thanks again

simplyZbest