Question about 1984 Nissan Maxima
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.
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
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
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
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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