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The voltage issue - good idea. This would possibly describe/identify something else I've observed since only owning this car from 1 month. It gets about 200 miles to a full tank of gas - roughly 20 mpg. seems lower than what everyone says they get out of their cars. Exhaust smells rich on my car all the time. Strange thing is that all this rough idle came about after all the tune up. One last thing: Brand new dist cap - however when I pulled it to check for moisture it looks like crap inside - the contacts all look very abused, more like what i'd expect to see from an old one - not a clean new one out of the box. Just installed it 2 days ago. Anyway - I have much to learn...better get back at it! > On 26 Apr 2004 at 19:45, type3@comcast.net wrote: > > > Greetings Type3 folks - first time posting. > > > > Car = 69 Square all stock 1600 with FI intact. > > > > Did a full tune up this weekend - plugs, wires, cap, rotor, > > points/condenser. Car runs beautifully down the road - however after > > this tune-up, the car runs rough when cold (like no choke). Once the > > car warms up its fine...just the first start in the morning when it > > idles rough. I can feather the gas pedal and raise the RPM and that > > helps smooth it out and warm it up...then it idles fine. > > Do you know which Brain your FI has? The early "A" brain had some trouble > running too rich and it would sometimes run rough until it warmed up and leaned > out. I have found that I could "fix" this by just driving 1 block normally down > the street and then taking my foot off the gas to let engine braking pull air > thru the engine. This seemed to flush out the excess gas and then when I > reapplied the gas I'd find that all 4 cylinders were firing. > > > I have a Bentley - and I've read the fuel section thoroughly - just > > seems that the manual tells you a lot about how to remove/replace > > parts but not what those parts do. Does the cold start valve provide > > a steady flow of extra fuel - or just one spray? > > The CSV only sprays when BOTH of the following conditions are met: > > 1) The starter is cranking. > > 2) The engine is at a temperature below the trip point of the temp switch. This > temp varies by year between 10 and 40F. > > It's not likely active this time of year. > > One more thing. > > If your voltage regulator is worn out and regulating at too low a voltage, this > will also make the FI run rich, which will make any other richness problems > much worse. This is a common problem. > > You should measure a voltage of more than 13.5V at the battery with a warmed up > engine running at medium RPM. If your voltage is lower than this, replace the > VR with a genuine Bosch 30-019. > > This is a common problem with the FI cars. > > -- > ******************************* > Jim Adney, jadney@vwtype3.org > Madison, Wisconsin, USA > ******************************* > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org >