93 maxima EGR valve

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Al Moodie - 21 Jul 2006 02:12 GMT

Hi,

93 Maxima, auto, 174k miles.

Engine has started to run rough at low revs, idle up to about 2500 rpm
where it smooths out. From reading previous posts I suspect the EGR
valve. Previous posts say that the port from the valve to the manifold
should be cleaned.

Questions:
1) Is it the port on the EGR valve or EGR valve solenoid that should
be cleaned, I am unclear.
2) Does the port I am supposed to clean run to the the inlet or the
exhaust manifold, again I am unclear.
3) Do I have to remove the EGR valve
4) Is there a website somewhere that will show me the steps.

Al Moodie.

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Wiikinki - 21 Jul 2006 07:25 GMT

The EGR exhaust gas valve gets dirty (if any), EGRC hose end connections possibly brittled

If EGR Temp sensor or connector bad, rpm is high with fans on

Otherwise, your problem fits also to various intake/vacuumhose leaks, IACV cleanup need..

Some EGR info her
http://www.cardomain.com/ride/748507/
http://memimage.cardomain.net/member_images/4/web/748000-748999/748507_14.jp

--
Wiikinki
www.cardomain.com/ride/748507/

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njmodi - 21 Jul 2006 17:26 GMT

> Hi,
>
[quoted text clipped - 14 lines]
>
> Al Moodie.

Al, I'm not sure how the VG engine setup compares to the VQ in my 96,
but I'm sure it's fundamentally the same.

The EGR valve has two seperate orifice tubes. One connects the valve
to the exhaust manifold and one runs from the valve to a port on the
intake manifold. On the VQs, the most common EGR problem was that the
EGR port that the EGR guide tube from the valve connected to would clog
up. The fix was to remove the tube and the intake manifold and clean
both out with some type of solvent (carb cleaner, etc.). The valves
rarely are the problem on the VQ. This is a time-consuming but "free"
repair - I would recommend you try it first before replacing the valve.

Specific answers to your questions:
1. Port is on the intake manifold
2. See 1.
3. No
4. Not that I'm aware of.

Cheers,
Nirav
96 Max GLE, 135k

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Wiikinki - 23 Jul 2006 07:56 GMT

..Al, I'm not sure how the VG engine setup compares to the VQ in my 96, but I'm sure it's fundamentally the same.....
Only the depicted part of the circuit is equal - see pic above. BUT. VGE circ is simpler, u can see that if/when u compare the picture to VQ EGR-circuit

= EGRC-BPT valve is 'missing' on VGE

--
Wiikinki
www.cardomain.com/ride/748507/

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