Intermittent stalling?

[RS91]

After taking my car to nissan dealer. I'm still having the same problem and nissan can't figure it out. My car start and runs fine when it does. The problem is that the car dies while I'm driving. It seems like the car is being turned off on the ignition when it does. It doesn't hesitate or slow down, the engine just dies. Sometimes the car just start right back and other time it just won't start. I've replaced the spark plugs, Ignition relays, fuel pump, distributor assembly, cleaned ground wires and flushed the injectors. What else could it be? No ecu codes also.

Thanks

[PMan_S13]

Are the lights still on when it dies? I'm wondering if you have a loose connection to the battery.

Does it die while in gear? Or when it's in neutral? Sometimes if you take your car out of gear if you have a problem with the brake booster it draws so much power the motor can't idle and just dies.

I might check out the coil and see if it looks corroded or has loose connections. Also might just be going out.

[s13sr20chris]

poss ign switch issue. try wiggleing the key next time. better yet pull the clamshell off of the steering column and wiggle ign switch wires.

[RS91]

Yes all the lights are still on. The car dies while driving or in Park/neutral position. I also did try the ignition switch but no luck. What about the crankshaft position sensor, what does it do? can it cause this problem?

thanks

[s13sr20chris]

yeah, the crank sensor will do it. what year and model. some nissans are more prone to crank sensor failure then others. if its a ka24 then its inside the distributor. crank sensor controls your ign so if it was messing up park or neutral would not really affect it. sometimes a car will run rough and while idleing it will just stall out. so the root problem in that case would be running rough. if nothting else you can start by trying to turn your idle up and see if that helps. if so then we have narowed it down a little.

[RS91]

240sx 95. I will check on it tomorrow and let you know the outcomeThanks

[RS91]

No luck!! After installing the crank sensor I'm still having the same problem... Now I'm looking at the computer box. When the car is running fine I tried getting the code by using the screw driver method. I was able to get code 55. I waited for the car to stall. When the car stalled I tried getting the code but the LED just stay on. No blink what so ever. The LED just stays on even when I turned the screw counter clock wise for more than 2 second then back to it's original lacation. Could the ECU be my problem? It seems that it freezes.

Thanks

[s13sr20chris]

possible but i doubt it from the reasoning you gave. if the car stalled the ecm prob wont go back to diag mode unless you cycle the key. so if you are not getting any codes... well that sucks. what crank sensor did you replace. the really important one is inside the distributor.

[RS91]

I Replaced the Crank Sensor on the Bell housing and My distributor Assemble is New. What else could it be? I ony get code 55(normal) when the car is runing but as soon as it stall I could not get any code because the LED stays ON when I try to get the code. No blink what so ever.

[s13sr20chris]

yup, that is typical. when you stall you go back to bulb check mode like you never started at all. could you check to see if it is loosing spark or fuel. does fuel pump cut off at same time as the motor or afterwards? can you keep it from happening by holding the revs up?

[RS91]

There is spark and fuel all the time. And nope I can't keep it from stalling even if Rev higher.....

[s13sr20chris]

you have spark and fuel even when it dies? thats odd. maybe dist throwing timing out of whack. by having fuel do you mean pump stays on and injectors keep firing?

[RS91]

When the car dies and I try to start the car again, I'm getting fuel and sparks.... yes it is very strange because not even our local nissan service dealer can figure it out....

[s13sr20chris]

i can only say check your spark plugs after the stall. try spraying carb cleaner in the intake while stalling to see if it stays running. use a spark checker to see if it is throwing spark while stalling.

[RS91]

I'll try to loan another ECM.... and see what happens...I'll just have to find one here.... I'm crossing my fingers on this one. Because it's very hard to find ECM here

Thanks for all the help

[RS91]

One more question? Can I use an ECM from a 95 Manual Trans to 95 Auto trans? Again car is 240sx

Thanks

[s13sr20chris]

just to see if it runs? yeah. dont try to drive on it though. the tcm needs to see an auto ecm.

[p00t]

repeating what s13sr20chris said...

double check that its actually getting fuel. does it crank over fine but just isnt catching?

fuel pump problems are often intermittent like this, check to see if there is fuel pressure, and that the pump is running. Put your ear to the trunk floor while turning ignition to the "on" setting it should run for 5 seconds to prime the line.

If you keep cranking and have fuel pressure, check the plugs, are they wet with fuel? if so its not firing. Could be a distro or coil problem then. I think the 95's have an internal coil though and that should come new with your distributor.... only thing it could be then is bad relay or harness wiring... Dont worry about the ECU, I've yet to see or hear about a faulty one!