I have a 1990 240 sx. It has a problem of cutting out on the freeway. If it's under a load,or going up hill, it will cut out in 4th and, or 5th gear at 3.5 rpm. Than kick itself on again in a few seconds. Speed Sensor has been replaced. This only happens if the speedometer is going crazy. The car like to drop its idle as soon as you step on the gas from a stop. Having no power to get out of the way of cars coming towards it. Never the less I think it may be a short and my boyfriend thinks it's the computer. What do you think?
Modified by piapetpower at 2:21 PM 9/6/2005
Just can't figure it out!
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piapetpower
- Posts: 11
- Joined: Sun Jun 26, 2005 7:28 am
- Car: 1990 Nissan 240 SX
Oh is randy your boyfriend?
It sounds as if your speedo head itself is the problem. When you said speed sensor were you reffering to the pick up wheel in the trans? If so thats not your actual speed sensor. The speedometer is the speed sensor for the ECM in your car. If that goes out while driving it could cause the speed limiter to kick in.
It sounds as if your speedo head itself is the problem. When you said speed sensor were you reffering to the pick up wheel in the trans? If so thats not your actual speed sensor. The speedometer is the speed sensor for the ECM in your car. If that goes out while driving it could cause the speed limiter to kick in.
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piapetpower
- Posts: 11
- Joined: Sun Jun 26, 2005 7:28 am
- Car: 1990 Nissan 240 SX
Re: (NISTECH)
NORandy is not my boyfriend!I add the speed sensor for the ECM replaced.The code was pulled.
Sorry didnt mean to offend. he was on here recently describing the exact same problem your having and said is was his girls car....lol He lives in antioch so I was doin the math..my bad.
On your problem you could have a bad trigger wheel in the trans. It is a frequency generator. It sends an AC pulse wave. If you have a volt meter with AC on it you can check it by hand. you have to pull it out of the trans and spin it by hand. Be warned though fluid will pour from the trans when you pull it out. Find the connector for it and hook your meter to there and spin it steadily and see if it glitches at all.
On your problem you could have a bad trigger wheel in the trans. It is a frequency generator. It sends an AC pulse wave. If you have a volt meter with AC on it you can check it by hand. you have to pull it out of the trans and spin it by hand. Be warned though fluid will pour from the trans when you pull it out. Find the connector for it and hook your meter to there and spin it steadily and see if it glitches at all.
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piapetpower
- Posts: 11
- Joined: Sun Jun 26, 2005 7:28 am
- Car: 1990 Nissan 240 SX
Re: (NISTECH)
I'm the one who is sorry. I was in ***** mood. Good news is I'm past that now. Once again I'm sorry. I'll run that past my boyfriend. (Sean) He's the mechanic. Who is most likely wishing that he never said He wasn't sure what the problem is. He just loves it so when I get involved. (HA) So anyway~ What I don't understand with it being a bad trigger is that the speedometer does not go crazy all the time. And why is it that the car will shut itself down under a load only if the speeometer is acting up? If the trigger is bad can it be bad only some of the time? How can that affect the idle droping at take off? There is one more thing I don't feel is related. (Again only once in a while) I'll go to start the car, and the car will not start up. It turns over. I have to keep the key on and press the gas pedal down until it starts, mean while the car shakes like mad. As I set hear thinking about it maybe it is related. All of the problems could be FUEL related. What do you think? I could almost live with the shuting down and the acting up of the speedometer. It's the drop in the power of the idle that I can't stand. Pulling out in front of traffic to make a turn when suddenly you can't get out of the way is no fun for me. Thanks for any help you may give me and sorry for being such a *****. PIAP.S. Here is the mileage and vin#. Maintenance has been maintained by myself and the owner before me (which is my brother and his wife)107391 MileageVin # JN1HS34P3LW108932
Modified by piapetpower at 11:27 AM 9/8/2005
Modified by piapetpower at 11:55 AM 9/8/2005
Modified by piapetpower at 11:27 AM 9/8/2005
Modified by piapetpower at 11:55 AM 9/8/2005
No worries
You are probably correct on the fuel problem. Since the car is so hard to start sometimes it indicates it might be rich. If it happens more when its hot I would take a look at the coolant temp sensor connector and see if you have some corrosion build up in there. If not maybe ohm check it and see if it falls within factory specs. That is one of the most common problems with older nissans in general on hard starts.
You are probably correct on the fuel problem. Since the car is so hard to start sometimes it indicates it might be rich. If it happens more when its hot I would take a look at the coolant temp sensor connector and see if you have some corrosion build up in there. If not maybe ohm check it and see if it falls within factory specs. That is one of the most common problems with older nissans in general on hard starts.
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piapetpower
- Posts: 11
- Joined: Sun Jun 26, 2005 7:28 am
- Car: 1990 Nissan 240 SX
Re: (NISTECH)
Hi What you told me so far is for the shuting down I should check the speedo head, for the speedometer I should check the trigger wheel and for the hard starts I should check coolant temp sensor and ohm. Correct? If there is anythings you can think of would you please let me know? Thanks very much for your time. PIA
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piapetpower
- Posts: 11
- Joined: Sun Jun 26, 2005 7:28 am
- Car: 1990 Nissan 240 SX
Re: (NISTECH)
Thanks so very much!! I will let you know how it went.PIA