HELP! Problem With '98 Nissan Sentra...

Jun 08, 2007 3 Replies

Could someone please help,



My '98 Sentra Si 1600 suddenly quit revving past 2000.



No matter if I'm in park, neutrual, or in any gear. It is absolutely fine until it hits that mark and then all of a sudden it begins to slowly die and I cannot accelerate (no warning signs appear on the dashboard), like it isn't receiving any more fuel.



If I push my clutch in and the revs drop back below the 2000 rpm line the car continues to run. This problem occurs randomly and without warning at times which makes it harder to diagnose.



I have checked/changed the following:


-Tested Fuel pump relay and check fuel



-Press check and clean distributor cap



-Rotor treat against moisture check



-Power to fuel pump - took fuel sample



-Checked for water in fuel



Also, I was thinking alternator - but the battery light would be on if this was the case?



If not that the computer, or something causing the computer to malfunction as its misreading it/supplying false information?



These problems just started and any info would be greatly appreciated. I thought it might be important to mention it was rainy weather when this happened. I dont have much experience with cars :( Im still quite young and this is the first vehicle I've owned. So please..If its not too much of an inconvenience would you mind explaining in lamens terms :D sorry.



Thanks in advance.



It`s not thealternator, and I dont think it`s the ecu. (computer) My gess woud be the egnishon (sorry about my english) sparkpluggs or the wires on top of the sparkpluggs (I dont now what it is in english) It can be clogd fulefilter It can also be some problems whit a sensor, that`s putting the ecu in fail-safe-mode, but the engine light would be on. The last thing I can think of is the catalysator, but then the problem woud not be randomly. It is offen eginshon-problems, when they acour in rain. I hope you understand some of the tings I`m trying to right.

skrev i melding news: snipped-for-privacy@r19g2000prf.googlegroups.com...

Sounds like failsafe mode, check the wiring to your mass airflow sensor, maybe try unplugging and reconnecting it. Try tapping gently on the sensor housing while the car is running or while it's cutting out at 2000 rpm and see if it has any effect.

Go to to a junkyard and buy a used MAF mass airflow sensor. Pay about $40-$50. The MAF is located in the plastic housing above the air filter. When you get the used one, you will recognize where it goes by comparing its shape to what you see in the engine compartment by the air filter.

CD

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