Question about 1984 Nissan Maxima

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1984 Nissan Maxima, 2.4 inline six cylinder, Very low vacuum


Hey Guys,
I have a 84 Maxima wagon that is only pulling about 10" of vacuum. I replaced 90% of the vacuum lines, replaced the intake/exhaust manifold gasket. Another problem associated with this is, when you remove the oil filler cap the engine stalls out. You can feel the suction while lifting off the cap. I replaced the EGR valve and checked the PCV valve.
It seems like the engine is not ventilating properly. It idlles rough and has extremely low power taking off. Once you get it up to 55-65 MPH it does run better, but still not as it should.
The car has 185K on it. Did a compression test and 4 cylinders were 100 psi and the other two were at 90 psi.
It uses about a quart of oil every 2500-3000 miles.
I really like the car and hope that I can figure out what the problem is. The mechanic that helped me said he is totally baffled as what to look for next, as he has never seen an engine stall by removing the cap.
I appreciate any help you that you might render.
Thanks,
Jim

Posted by on

  • Jim Good Jan 09, 2009

    Thanks for the reply. The car isn't worth what a rebuild job would cost. I'm just hoping that I've overlooked something simple. We also checked the firing order to be sure that the plug wires were lined up correctly. That still doesn't explain the vacuum problem.

  • Travis Humphries
    Travis Humphries May 11, 2010

    Been a Mechanic for 35 Years and have NEVER heard of anything like that! Good Luck! I really hope that someone can help with this Short of Rebuilding the Motor.

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SOURCE: 1997 Nissan Hardbody has rough idle/surges/stalls

the 2001 altima is what i have and I had the same problem as you. turned out to be a bad head gasket factory used cheap ones for a few years before they found the problem. one way to test this is to get a can of carborator cleaner and spray it around the area where the head meets the block under the intake problem should be around the 4th cylinder or close to driver side. if the head gasket is bad the rough idle will smooth out while you are spraying the head.

Posted on Aug 06, 2009

Mr BrokRench
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SOURCE: 85 nissan pickup runs rough at idle

you may have a carbon buildup problem in the egr system, i would check this and the hoses for leaks first

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SOURCE: 1994 Nissan Altima Stalls intermittedly at startup

tell your mechanic to look up Service Bulletin #96-032 this could fix your problems

Posted on Oct 05, 2009

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SOURCE: 1997 Nissan Hardbody has rough idle/surges/stalls

ok i have the same truck my timing was off 3 teeth but mine wouldn't kick out of high idle is y mine was surging but know with timing right no vacuum leaks i cant get it below 1400 but when a vacuum turns on it almost kills my engine any thoughts i know i got a vacuum line mixed up idk were though

Posted on Jan 19, 2010

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SOURCE: 2001 nissan altima code says cylinder 1 miss fire.

a lot of people have reported this issue with the 2001 Nissan altima. it is a design flaw and the idle rpm fluctuation is caused by a bad intake manifold gasket. the part only costs about 10 dollars but do to the 5-10 hours it takes to replace it is a very costly on the labor side

Posted on Feb 05, 2010

SOURCE: My 1986 Nissan 300zx non-turbo was running fine,

It sounds like the number 2 injector is hung open.

It will dump fuel and cause all sorts off issues with the ECU.

You should ohm that injector and compare it with the others to see if it is wildly different. If so, change it out and retest.

Posted on Jun 27, 2010

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2_17_2012_6_58_18_pm.jpg

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Fig. 10: Emission control system vacuum diagram-1984 Z24 (49 States & Canada except High Altitude)


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Fig. 11: Emission control system vacuum diagram-1984 Z24 (49 States High Altitude)


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Fig. 13: Emission control system vacuum diagram-1984 (Calif. w/MT)


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