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/> .
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