Chad, Try timing the car with the stock chip and set the fuel mixture to stock. Let the engine warm up and go through a few fan cycles. Make sure that the ignition timing is set to 6deg advanced. You'll have the drill that rivet to get at the fuel mixture.
The chip will adjust the timing advance and fuel mixture by itself. That's probably why you're hearing the ping. Adjust the cam timing by getting an adjustable cam sprocket. As far as I know Garrett makes the chips for TT. If you're still hearing knocking then contact TT. Last summer I was running my 2.0l 16V CIS-E Motronic at 16Deg Advanced and pulled like a mo-fo all the way to the redline, and wanted to keep going. I later had to trim the timing back because of some pinging. It's safer to run a bit rich than run too lean. Hope that helps, Mark. ----- Original Message ----- From: "Chad Rebuck" <[email protected]> To: "16v" <[email protected]> Sent: Thursday, May 15, 2003 4:06 PM Subject: [a2-16v-list] setting mixture on cis-e motronic > I am going to attempt to verify and adjust the mixture on my 90 jetta 16v. > It is a cis-e motronic. I am using the info on the following page: > > http://www.iders.com/alexweb/vwtuning1.html > > I have a tt chip programmed for the tt cams installed now and my car has > slight ping under load. It has always had a slight ping, barely audible, > but you can feel the car back off the timing. The new tt chip and cams > seems to have made it a little more noticible than my old tt chip. I've > already set the timing for 5 degrees advance and that didn't make any > difference. Anyone have tips on how to adjust the mixture aside from this > page? What is the best way to get access to the adjustment screw? Drill > and thread a small screw into the plug then pull it out? Has anyone done > this except Alex, who created the help page above? :) > > Chad > > _______________________________________________ > a2-16v-list mailing list > [email protected] > http://mail.a2-16v.com/mailman/listinfo/a2-16v-list > For list archives, see listinfo link above. >
