[Shotimes] Smog Woes

[leighsm@comcast.net]

Turn the A/C off, restart the car, and see if that helps. My compressor on
my 89 was seizing intermentantly, and it thru off the idle control computer
bigtime for over a year til I found it.
To check for vacuum leaks: disconnect hose at engine, need hand held vacuum
pump/guage, should hold.
I've seen leaks in hoses, connections, fittings, vacuum tank in fender, and
the vacuum pull hose for the cruise control down by the clutch pedal where
it rubbed thru the hose by the steering gear (my 94 with dead cruise).
Manifold vacuum leaks can be checked with a spray of some type at the gaket
area with engine running.
With all the mods you have you may need to check that your O2 sensors are
good, and the mixture is right. Did you get CO readings during you smog
check?
Good luck
Lee


----- Original Message ----- 
From: "Alan Fanning" <Awfanning@earthlink.net>
To: "SHOtimes" <shotimes@autox.team.net>
Sent: Thursday, February 26, 2004 12:53 AM
Subject: [Shotimes] Smog Woes


> Between the weather (rain), work (12 hr days), and the SHO I'm about to go
> 'round the bend. I figured I was a shoe-in to pass smog today with cool
damp
> weather and the SPOUT plug pulled. No such luck - besides running like a
> pig, as you had warned, the engine wouldn't hold a steady rpm setting
while
> on the dyno and the test was ultimately aborted after several attempts.
Last
> time around (a couple weekends back) it seemed to hold rpm but wouldn't
pass
> on NOx.
>
> I removed the intake last weekend to clean the EGR passages (didn't seem
to
> be clogged) and buggered up the gaskets in reinstalling the manifold. No
> spares, so I just put it back together. No doubt this didn't help matters,
> but one of the things that has puzzled me on this car from the get-go is
> that, with the trans in neutral or clutch pedal in, I can't get it to hold
a
> constant elevated rpm below about 2000 rpm. It either scoots up or down
from
> the point I'm trying to hold. Seems like a connected symptom. Vac leak
> maybe?  I've previously checked/replaced all the hoses and the intake
> gaskets.
>
> I've got about 5k on new plugs, plug wires, O2 sensors, IAC valve, and
just
> about everything else that is replaceable. I was running a 55mm MAF which
I
> believe to be good, and no LPM. Spec's include Stage 1 cams, SHOShop 3.2l
> w/10.5:1 compression, stock manifold, new/rebuilt OEM-spec injectors.
Engine
> seems a little rough at idle, but I have no way of telling whether it's
the
> cams or something else.
>
> Any help appreciated. I'm about to run out of time (and patience) here.
It's
> a pretty car but...
>
>     Alan
>     '91 SHO
> _______________________________________________
> Shotimes mailing list
> Shotimes@autox.team.net
> http://www.team.net/mailman/listinfo/shotimes