Re: [DMCForum] glowing cat
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [DMCForum] glowing cat



Changing fuel system components can/will screw up your fuelling 
big-styleee. Darren recently recommended my friend Chris get some new 
injectors, and on putting them in, his CO output leapt from a healthy 
1.5% to a whopping 6%, shows new injectors were a good idea!

When we had a friends car in for head gaskets a month or two ago, I 
finally bit the bullet and went for an el cheapo gas analyser, and I 
wouldn't be without it now! Of course, thanks to Ed Uding, most cars 
over here have no cat....

Here's another of "Marty G's rough'n'ready tips":

If you pull the adjustment screw bung out quickly, does it stall? If is 
idles smoothly when warm but stalls when you pull the plunger out, it's 
within 1/4 of a turn of the right setting. If it doesn't at least 
struggle when the plug is pulled, it's either too rich, or you have a 
vacuum leak.

Been tinkering on my own car for a change over the weekend and just 
drove it to the Renault Owners Club meeting running a Volvo 760 metering 
head, CPR and dizzy. I think the CPR needs rebuilding becasue it didn't 
feel a whole lot different and it's supposed to have 170 horses this
way....

Martin

Walter Coe wrote:

>I'm still several days behind catching up on this forum.  But today I
>chatted with Mike C & Rich on the phone and had Samuel over all day
helping
>me work on my car.
>
>Anyway, about my cat:  It started glowing a lovely orange-red which is
>particularly spectacular to see at night.  It was really just the output
>side that was glowing.  I thought that the whole thing was "supposed" to
>glow.
>
>The situation is that I just replaced most of my fuel system: fuel
>distributor, warm-up regulator and injectors all from DMC/Texas.  I tried
>adjusting the air/fuel mixture using a dwell meter, but the duty cycle
>pretty much stuck to 50% no matter how I adjusted the screw.  And what is
>this crap I hear about these adjustments being sensitive?  I could give
it
>several turns before it would start to make a difference.  I'm thinking
that
>maybe the O2 sensor is way out of range and the ECU is running on its
>internal settings.  Whadda ya think?
>
>I started off with Martin G's method of adjusting the mixture: depress
the
>plate 1mm and adjust the screw to where the injectors start to come on.
>Right?  No problem.  The car started right away and ran fine.  I didn't
>bother increasing voltage to the coil.
>
>Waiting for the car to warm up, I wanted to be sure it was running too
lean
>rather than too rich.  Otherwise I could damage my cat.  (Oh yeah,
right.)
>So I turned the adjustment screw CCW (roughly translates to
anti-clockwise)
>as far as possible to where it was about to stall.  I ran the car like
this
>for several minutes until it warmed up.  By this time the cat was glowing
>red.  Is it that a too lean mixture will make the exhaust (not
necessarily
>the cat) run too hot?  Is this why it was the end of the cat that was
>glowing and not the center?  Or have I been smoking some really good pot?
>
>Walt
>
>  
>




Yahoo! Groups Sponsor	 
 
<http://rd.yahoo.com/M=259395.3614674.4902533.1261774/D=egroupweb/S=170512
6215:HM/A=1524963/R=0/SIG=12o885gmo/*http://hits.411web.com/cgi-bin/autore
dir?camp=556&lineid=3614674?=egroupweb&pos=HM> 	 
 
<http://us.adserver.yahoo.com/l?M=259395.3614674.4902533.1261774/D=egroupm
ail/S=:HM/A=1524963/rand=903621751> 	

To unsubscribe from this group, send an email to:
DMCForum-unsubscribe@xxxxxxxxxxxxxxx



Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service
<http://docs.yahoo.com/info/terms/> . 

<<attachment: winmail.dat>>



Home Back to the Home of PROJECT VIXEN 


Copyright ProjectVixen.com. All rights reserved.

Opinions expressed in posts reflect the views of their respective authors.
DMCForum Mailing List Archive  DMCNews Mailing List Archive  DMC-UK Mailing List Archive

This site contains affiliate links for which we may be compensated