Timing Woes, I am certain that I am making this more difficult than necessary Options

[ctc911ctc]

All,

So, I have done this only once before on a VW in '72. SO I am really new at this.

With my '74 2.0L that I am currently working on I am having a great deal of difficulty having certainty as to the timing.

I read and re-read the Birdboard entry on this. Did not disconnect the vacuum first time and now since I know better I thought I would try again.

I used the template to mark the fan at 2.x inches to the left (as viewed from behind the car) of the TDC mark (which is a CIRCLE on this fan) and I found a small notch at the 2.x mark - I marked the blades on either side of this mark with White out to assist in finding it while it is moving.

Warmed up the car and set the timing light to 0-degrees advance. Started the car (vacuum removed and plugged) and started to look at the advance. At idle (still chasing this, cannot get it below 1100/1200) the advance 27deg timing mark is very close to the NOTCH. At higher RPMS the 27deg mark is not close to the notch.

The car is running good - though I am chasing two issues.
1. Running very rich, I may still have a vacuum leak, have replaced near everything with exception of plenum and the connecting gaskets to the intake (next on the list)
2. Idle too fast - Throttle body set screw is in all of the way, too much bypass, need to find the leak. Most likely this is part of the #1

So here are my timing Questions:

1. In the chart below, is there correlation between cars (year/engine) and distributor numbers? Kinda weird that it was put into the Birdboard instructions on this topic with no references to it.

2. If I set the dwell angle on my timing light to the degrees of each of the RPM's might it be easier to find which way I need to go advance? retard? or do we just 'play with it'

3. Is it common to get shocked by the plug wires (they are new) while adjusting this thing while running? BZZZZIP (need an electrocuted emoticon here)

Many Thanks in Advance: Love this Board; CTC911CTC

[ctc911ctc]

Took off the entire upper assembly to chase the vacuum leaks. My impression of this exercise is:

If the engine has not been running for over 10 years - EVERYTHING in the vacuum chain should be removed and regasketed.



Plenum does not have any holes from rust nor do the seam welds have any leaks - used solvent to chase the tiny leaks - not sure how I was supposed to plug all of those holes to pressure test this, has anyone done that?





My son went nuts on the pipes - really looks great - we are going to put clear coat on this , paint would be a sin.




I also took the opportunity to send all of my injectors back to Hurst Injectors, Paul wants to take another look at them, as well as recondition the ones that I recently purchased. At the end of this job I will have spares of EVERYTHING!

[Olympic 914]

Took off the entire upper assembly to chase the vacuum leaks. My impression of this exercise is:

If the engine has not been running for over 10 years - EVERYTHING in the vacuum chain should be removed and regasketed.



Plenum does not have any holes from rust nor do the seam welds have any leaks - used solvent to chase the tiny leaks - not sure how I was supposed to plug all of those holes to pressure test this, has anyone done that?

Yes chased a vacuum leak for a bit. it ended up being the tubular supports that run through the plenum. Used pipe plugs for the intake connectors and cut a piece of gasket material without a hole and bolted on the throttle body to seal that area. used hoses with bolts to seal the others.

[ctc911ctc]

WOW - very impressive, I could not see any seeping from those weld points - will let this thread know the outcome after I remount all of the hardware.

Took off the entire upper assembly to chase the vacuum leaks. My impression of this exercise is:

If the engine has not been running for over 10 years - EVERYTHING in the vacuum chain should be removed and regasketed.



Plenum does not have any holes from rust nor do the seam welds have any leaks - used solvent to chase the tiny leaks - not sure how I was supposed to plug all of those holes to pressure test this, has anyone done that?

Yes chased a vacuum leak for a bit. it ended up being the tubular supports that run through the plenum. Used pipe plugs for the intake connectors and cut a piece of gasket material without a hole and bolted on the throttle body to seal that area. used hoses with bolts to seal the others.