1991 Nissan Sentra NO one knows about the problem. Hope ya

Tiny
ANPEE123
  • MEMBER
  • 1991 NISSAN SENTRA
  • 4 CYL
  • 2WD
  • MANUAL
  • 50,000 MILES
The car starts, and moves. But you have to balance clutch to accelerate. And it happens to all gear. And and when I press on gas all the way. While the car is moving, it idles at 2k to 3k. And not rising or lowering. Tooked it to family machanic and he knew nothing. I swap the throttle and the MAF and still nothing. Please help. Wat is the cause of this, and how can I fix the car?
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Thursday, March 27th, 2008 AT 6:44 PM

8 Replies

Tiny
SERVICE WRITER
  • EXPERT
LEt me re-cap and correct me if I'm wrong.

You start the car it idles normal. You press the clutch, shift it into first. Release the clutch it is fine? Or you can not release the pedal all the way and have it move?

So your rolling allong, shift it into second, but you can onlt gain momentem if the clutch is partially released.

HAve you checked the fluid level in the clutch master cylinder? Sounds like there may be a worn disc or oil on the disc if iI understand this right.
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Thursday, March 27th, 2008 AT 7:15 PM
Tiny
ANPEE123
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Maybe. The story is that I blown my old engine and got a new one. Same engine sr20de but it is a JDM one but that doesnt matter. But yea everything is plugged in correctly cause every plug has its own unique connections. So then yea as u were saying. When I start the car, sometimes it cranks only but it will somehow start. And when it starts, the idle remains still. I press on gas slowly and try to keep it rev ing at 4000 rpm. To warm up the car. When the car is warm enough, I tried punching the gas peddle once hard and hold it, it stays idling from 2000 to 3000 rpm but if I keep on pressing it over and over, it can go higher. When I put it in 1st gear, its ok, it didnt die. I can cruise with it but I have to really balance clutch even on 2nd to 5th gear. I can put it in gear and let the clutch go and it jerks yea. On neutral and in gear, it chokes and or wont go. OH CANT OPEN THE ENGINE CAUSE ITS STILL UNDER WARRANTY. So then as u were saying, its the transmission right? The wires are the same, the transmission is the same, only the engine is different. So if its not the engine then its the tranny cause the wires didnt die on the other engine. But look more into it. And ill check back on you about the tranny/clutch master cylinder after I check it out.
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Thursday, March 27th, 2008 AT 11:05 PM
Tiny
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Okay I'm getting a better idea of what is happening.

I'd like to know what the fuel pressure is. By the new description, it gives the impression of a fuel pump on it's way out or poor power to the pump.
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Friday, March 28th, 2008 AT 9:20 AM
Tiny
ANPEE123
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Oh. Ill get back to you today after I check it. Need to buy it and check it.
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Friday, March 28th, 2008 AT 5:42 PM
Tiny
ANPEE123
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I cant check the fuel pressure cause there is only the pressure gauge tester for ford chrystlers and stuff. None of it is for nissan. Toyota or honda. Autozone dont have it. So I cant check the fuel but fuel is coming out of the pumps though.
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Friday, March 28th, 2008 AT 7:37 PM
Tiny
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If I recall right. :Shock:

The pump is under the rear seat. I think what we did was to tee into the fuel line to monitor the pressure while driving. With the problem happening when your moving, the poblem has to to be found under those circumstances.

I ran into a handful of these that had a wiring harness problem, wiring to the pump and pump problems that were believed to be creating by the wiring problems.

At this point, I would pull the back seat and get a good look at the connector at the pump.

Alos if you get a no start, don't keep cranking. Shoot some ther or carb cleaner into the throttle body and see if it fires immediatly. Theis will help confirm this is a fuel loss problem.
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Saturday, March 29th, 2008 AT 8:18 AM
Tiny
ANPEE123
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Maybe its that too. But I tried out my vacumm holes, and some or most of it doesnt suck or blow. The only one is the one that goes to the injector regulator. Thats all. So if that helps alittle too. But where on the rear seat? The back seat right? Or behind the drver seat? Cause the back seat is blocked and I can only see the white metal. No hole no wire/.
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Monday, March 31st, 2008 AT 10:57 PM
Tiny
SERVICE WRITER
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There should be an access hole with a cover there to get the the pump that is mounted in the tank. Under the pasenger side rear seat.

IF you pulled the seat out and it isn't there then it would be a matter of dropping the tank. Maybe yours was a part of the change over that eliminated that.
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Tuesday, April 1st, 2008 AT 5:12 AM

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