230.4 Can Anyone Repair This Car?
 

I have a 1975 230.4 with the 175 CDT stromberg. I cannot get this car to run within factory specs with all vacuum lines properly installed.

I have had 2 shops work on the car and the last guy hooked up the vacuum directly to the the distributor, diconnected everything else vacuum related and had it pass smog for me.

I have changed out the ignition to a MSD electronic ignition which has helped the secondary perfomance. However the (Factory) RPM relay box seems bad because I cannnot get the advance to switch on when the vacuum advance is run through the switchover valve.

Did I remove something that told the RPM relay box the RPM when I removed the stock control box? This car has been a complete headache.

The only thing I have not changed out is the RPM relay box and the relay box.
I hesitate as I do not know if they will work without the stock ignition box.

ANY ADVISE BEFORE I SCRAP THIS HEADACHE?

By the way I have found and repaired several vacuum leaks all resulting in resetting everything and the same end result. I have also installed all new vacuum switchover valves.

0-59 Well thanks anyway I fixed the problem.
 

To all 230.4 owners. If you convert to electronic iginition disconnect the old igintion box under the battery tray.

remove all wires hook up the new ignition per manual. Then coming out the RPM relay box (closest to the fire wall in drivers side) The manual shows a Green wire marked C. It shows it going to Double Cable connector term7 ZV??? (RPM FEED????)

Who cares. Just remove the cable to the box and take off the cover on the back of the cable plug exposing the wires. Solder a wire to the green wire. Take the other end to a RPM feed source, my MSD ignition has a RPM out I plug into there. Voala! My RPM switches to all Vauum switches operated by the RPM switch relay box now operates.
Vacuum advance is hooked up properly and the car runs as designed.

If you change this cars ignition and do not get a RPM signal to that switch the car will never run properly. You need the 2000 RPM switch to activate advance at 2000 RPM or you will have to move out of the way of people on wheelchairs or advance your timing so far the car will run like crap. Or as the mechanic who did not know what he was doing on my car hooked advance directly to distributor causing the car to run like crap!


Good Luck