Update#3. Re: Failed Emissions Inspection. AGAIN!!!!!

["content22207" <brobertson@xxxx>]

If plug #6 has soot deposits (they are dry?), it is getting fuel. It
just isn't burning it very well. 

1) Do a compression test on cylinder #6 (you want to compare to the
other cylinders). If it differs significantly, you've got ring
problems or an oval shaped cylinder.

2) Make sure cylinder #6 threads aren't cross threaded or otherwise
damaged by "crooked" plug. You need a tight fit for compression.

3) Once you've installed some decent new plugs (c'mon, they're only
$7-$8 a set), use a timing light at the plug to see how it's firing.

4) Observe injector #6 spray pattern. All you need is one empty coke
bottle. Use the procedure in message #32067, less actual screw
adjustment (don't forget to plug the empty injector port!).

That should be enough to keep you busy on a Sunday afternoon. Let us
know what you find...

Bill Robertson
#5939

>--- In dmcnews@xxxxxxxxxxxxxxx, "therealdmcvegas" <DMCVegas@xxxx> wrote:
> I realize that "Mechanic in a Bottle" doesn't exist. What I was
looking for was 
> "Bribe in a Bottle" to pass the emissions testing! ;-p Of course I
am admittedly 
> kicking my self twice over now. 1: I wasted money, and 2. The
disclaimer for 
> the "Will allow your car to pass, or double your money back!*" *Only 
> guaranted on vehicles with properly funtioning emissions, and fuel
systems. 
> Doh!
> 
> Anywho. I pulled the sparkplugs, and have discovered that plugs 1-3
show 
> normal characteristics, although 4&5 had much less carbon on them. This 
> could be due to the detergents and solvents that were run thru, I
don't know. 
> And then we come to plug #6, which was dry fowled. Unlike the others
plugs, 
> on this one the only place where carbon deposits had not covered
anything 
> was on the tips of the electrodes where the spark was arcing.
Although on a 
> side note, the ceramic insulater on the OUTSIDE of plug #5 is severly 
> yellowed on the bottom. This is the crooked plug as well, if that
makes a 
> difference.
> 
> So now I know for certain that this is a problem with the fuel
delivery system. 
> The gap ranges were varied on the plugs (between .27-.35), but this
plug was 
> literally middle of the road @ .32, compared to the others, which
were clean. I 
> still need to test the spray patterns & output volumes (need one
more jar). But 
> based upon the CIS theory, I would assume that injector #6 is
clogged, which 
> not just fowled the plug, but caused a rich condition in the
remaining 5 
> cylinders due to the lack of it's own proper fuel displacement. So
now I'd like 
> to clean the injectors. But as it turns out, my local official BOSCH
service 
> center can't do, since their machine is broken. So I'm off to find
someone who 
> can...