Question about 2000 Nissan Altima

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My altima engine light comes on and car runs really ruff then sometimes smooths out

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  • Nissan Master
  • 726 Answers

Sounds like you have a broken, leaky intake gasket. Spray some carb cleaner out of a spray can at the injector rail while the car is at idle and listen for any audible change in idle or in the way the car runs. Let me know what you find.

Posted on Jul 14, 2009

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Timing chain tensioner


I have a '94 Altima with 2.4 liter 4 cyl. engine. At around 150K the timing chain and tensioner were replaced - should solve your problem, too. If you're sure the chain is rattling you should really get it serviced now, not later. Also, if your car is running rough it could be more than just the chain and tensioner; it could be your ignition system, such as plugs, coil, distributor, etc. Bottom line is, your car needs to be checked out right away.

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Only runs ruff during park and idle.


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ENGINE VIBRATION AT IDLE BUT OK WHILE DRIVING.


Could be any one, or more, of the following -

Plugged injector
Bad plug wire
Fouled plug
Crossed plug wires (hard to tell sometimes on V-8s that run smooth anyway)
Vacuum leak
Leaky EGR valve
Shifted timing sensor

Scan engine for codes and proceed from there.

There is a product called RXP (available here in Texas) that will clean up an engine and gas. Its pretty awesome stuff, and this coming from a person who doesn't really believe in additives.

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