Topless Rabbit Forums

Ok, so it's been a while since I've posted any updates for this issue. Just wanted to post one now. The test plug for using a dwell/duty reading to adjust the fuel mixture is working. (I don't remember when/what I did to get it working) I haven't done anything (that I can remember) to find and fix v...

Actually, it's the other way around. The retard side goes to the manifold. At idle, manifold vacuum is very high, but it gets lower the more the throttle opens, so this provides timing retard at idle. Thanks for the correction. Based on that information it seems that since my car has the dual vacuu...

If you want to experiment you can try advancing the timing until the engine starts to ping under load, then backing off slightly until the pinging goes away. This might give you a little more performance but might also compromise your idle quality a bit. At least, that was the trade-off on my car. ...

I haven't had a chance to check the vacuum at the manifold yet, but I'm going to do that today. I was recently looking through the bently manual I have and realized something that I find odd. My car is a 1980, according the the bently manual the timing on my car should be set to 3 degrees after top ...

kamzcab86 wrote:Where is the 15 vacuum reading being taken at?

Off the vacuum line that goes to the brake booster/vacuum advance on the distributer.

Replaced the auxiliary air valve on Saturday with a working one. The car runs and sounds much better when it is warmed up. The dwell meter is still not getting an accurate reading on the test plug though...so it's still tuned by ear. Reads a steady 85 on the meter. Did a vacuum test as well, still r...

I recently had a good talk with my uncle who is a mechanic. I find it much easier to explain in person my issue to himt. He suggested that my idle issue could be vacuum related. He also suggested that since I already know there is a vacuum leak I should focus on that first and go from there. I'm goi...

I replaced the O2 sensor Saturday night. Since then the car has been running much better. I'm guessing that the old one went out a while ago and it just took me a while to notice it. Last night, however, it did something odd. I was driving home from work and noticed that it was idling way too high. ...

what happens if you trigger the full throttle switch? I don't have a full throttle switch, the 1.6 engine doesn't have one. From what I know they are only on the 1.8 engines...but I may be wrong. Based on some of the other things that I have noticed in the way its running recently I'm guessing that...

Recently tried the Teflon tape, it seems to have fixed that vacuum leak...I'll do a more in depth check later. I also just re-replaced the idle air screw o-ring. I was trying to adjust the idle speed and noticed that the screw didn't seem to be doing much, discovered that the vacuum leak was back. T...

Are these control pressure (valve open) or system pressure (valve closed)? These are with the valve open. I didn't take the time yesterday to do any testing with the valve closed. I did try closing the valve once to see what it did, the pressure gauge shot up to about 4.5 bar or a little higher if ...

Ok, just did a fuel pressure test. I'm not sure if this makes a difference, but according to one app on my phone the outside air temperature is 36F according to another the temp is 38F. With the engine running at idle I got a steady 3.5 bar pressure reading. Then I turned off the car to see how quic...

Are you refering to the cold start injector on the passenger side of the intake or the actual throtle plate? You might be able to get away with silicone on the cold start injector but I don't have enough experience with cis to know for sure. You may also want to check that cold start injector as we...

After checking the afm I noticed the car was not running like normal...turns out I forgot to clamp down the airfilter box properly. More importantly, while checking to see what was wrong I found a vacuum leak (I thought I got rid of all of them...) The leak is coming from the throttle body. One of t...

If you plan to keep working on CIS-injection VWs, you'll need it again sooner or later. Look at it this way...it's cheap compared to shop labor. ;) Decided to go ahead and get one. I found one for a little less here: http://www.sjdiscounttools.com/ta33865.html and it comes with a case :) Thanks for...