1987 Nissan Sentra Exhaust?

Tiny
DAWN MELTON
  • MEMBER
  • 1987 NISSAN SENTRA
Engine Performance problem
1987 Nissan Sentra 4 cyl Two Wheel Drive 190000 miles

Help! My 87 nissan sentra will start and run great for about 10min. It will die and start only after it has cooled. I have changed fuel filter, fuel pump, distributor, new wires, changed coil and changed it back. I took exhaust away from manifold, still died. Hoping this eliminated the possibility of it being the catalytic converter? When I was returning the coil I bought, that was not the problem. This parts guy told me to check my fuel, evidently I could have a sensor shutting down, giving to much or to little fuel. Where is this sensor? Do I have to adjust the carb. Why would it run great and then shut down? Really greasy female still in need of help!
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Thursday, June 19th, 2008 AT 12:11 PM

4 Replies

Tiny
BLACKOP555
  • EXPERT
Ahh another female getting in to mechanics, gotta love it :D

first step would be to hook up a vaccum guage if possible to check for a plugged/restricted exhaust.

Or you can keep the rpms at 2000 for a few mins and if you have to give it more gas to maintain the rpms the system is restricted.

You could take it off but it will be loud and mess with the o2 sensors.

Sounds like you shoul be checking the plugs and wires, and igntion module first.
If those arnt it it may be the o2 sensors causing this or the fuel pump because when it goes in open loop mode which could be near 10 mins the o2 sensors are calling for too much or too little fuel causing it to stall out.
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Thursday, June 19th, 2008 AT 12:42 PM
Tiny
DAWN MELTON
  • MEMBER
[quote="Dawn Melton"]Engine Performance problem
1987 Nissan Sentra 4 cyl Two Wheel Drive 190000 miles

Help! My 87 nissan sentra will start and run great for about 10min. It will die and start only after it has cooled. I have changed fuel filter, fuel pump, distributor, new wires, changed coil and changed it back. I took exhaust away from manifold, still died. Hoping this eliminated the possibility of it being the catalytic converter? When I was returning the coil I bought, that was not the problem. This parts guy told me to check my fuel, evidently I could have a sensor shutting down, giving to much or to little fuel. Where is this sensor? Do I have to adjust the carb. Why would it run great and then shut down? Really greasy female still in need of help! O2 sensor huh? Where is this located? Will it be the sensor or the pump or both?
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Friday, June 20th, 2008 AT 7:08 PM
Tiny
BLACKOP555
  • EXPERT
You say carburator? Is it carburated or efi?

Look on the emissions label.

If its carbed there is no o2 sensor.
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Friday, June 20th, 2008 AT 8:15 PM
Tiny
RASMATAZ
  • MEMBER
Check the fuel pressure and monitor it before it dies out. Could also be the crank angle sensor in the distributor-

B5 check your PM
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Friday, June 20th, 2008 AT 8:44 PM

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