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When pressing accelerator more than half way engine cuts out

Tiny
BLOWN-FLAT
  • MEMBER
  • 1987 NISSAN STANZA
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 80,000 MILES
If I lightly press the gas pedal car runs great but if I press it more than half way on the pedal it totally cuts out like its not getting fuel or spark. I recently did replace the fuel pump with new OEM one so not that. It will gradually only speed up to freeway speeds just can't mash gas pedal much. Was thinking might me throttle position sensor. It's fuel injection.

Also is there a way to read codes on this old a car?
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Tuesday, January 14th, 2020 AT 4:00 AM

9 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Hi,

It does sound like you don't have enough fuel pressure. Have you confirmed that it is within spec? Was the fuel filter replaced at the same time as the pump?

As far as pulling codes, take a look through this link and see if it helps.

https://www.2carpros.com/articles/nissan-obd1-diagnostic-trouble-codes-and-retrieval-procedure-1984-to-1994

Let me know if that helps.

Joe
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Tuesday, January 14th, 2020 AT 8:28 PM
Tiny
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Yes fuel filter is brand new. I'll check the pressure.
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Tuesday, January 14th, 2020 AT 11:53 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Check the fuel pressure and let me know what you find. Let's hope it is a simple fix.

Take care,
Joe
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Thursday, January 16th, 2020 AT 3:52 PM
Tiny
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  • MEMBER
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Thanks Joe. I will soon with my new fuel pressure testing kit and let you know.

Greatly appreciate your help. I'm also wondering if maybe I got some water in somewhere when I went to the quarter car was and did the motor. I know not to get the distributor and coils wet so I always wrap them up.

With thanks,

Ron
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Thursday, January 16th, 2020 AT 6:02 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Anything is possible. Let's hope it isn't something electrical because that can become a headache. LOL Let me know about the fuel pressure.

Take care,
Joe
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Thursday, January 16th, 2020 AT 6:13 PM
Tiny
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Okay, will do.

Ron
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Thursday, January 16th, 2020 AT 6:16 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Hi Ron,

Any luck with getting the fuel pressure readings?

Joe
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Sunday, January 19th, 2020 AT 9:05 PM
Tiny
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  • MEMBER
  • 5 POSTS
Thanks for asking I'll get to it this week.

Ron
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Sunday, January 19th, 2020 AT 10:08 PM
Tiny
JACOBANDNICKOLAS
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Sounds good.

Joe
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Monday, January 20th, 2020 AT 7:32 PM

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