Lost a cylinder, Car is missing bad Options

[catsltd]

Been working steadly on fixing my 1974 1.8L.
New injectors,plugs,Petronic point replacemnt.etc.

Driving to the store when all of a sudden something happened.
Car felt like it had dropped 1 of the cylinders.

Car does not rev at all,made it home and parked it.

Diid a compression test (cold),110 110 100 90.

Not happy with 90 on cylinder 1 but felt at least like motor should still be running.

Where do I go next.????

I have a dual vacuum line throttle body,and a single vacum on my for sure non stock distributor that had a 4500 RPm rev limiter.

(Distribitor mark for cylinder 1 is 180 degrees out.)

Like I said I put on a pertronic 1847 and a petronic blaster coil and 8MM wires.

I am thinking its a spark think,but really dont know what to do at this point.

I have ordered a Mallory Unilite distribitor(4554101),but wont install it till I figure this out.


Hoping for some help from you guys.
Thanks Grant.

[Dtjaden]

The way I would approach troubleshooting:

1. Pull plug wires one at a time. Does the engine rpm decrease or does it stumble when one particular plug wire is pulled? If so that cylinder should be good. If you find that pulling the plug wire on one cylinder does not hav an affect that is the cylinder that most likely has a problem.

2. You can also do this cylinder by cylinder testing by pulling the connector on each injector, one by one. If you find one cylinder where pulling the connector does not cause any change in the engine as above you can do one further test. Pull the injector and carefully place it in a jar to see if the injector is working (careful, gas is flammable). If it's not working you could have a bad injector, injector wiring or computer problem.

3. One last thing I might check is replacing the rev limiting distributor rotor with a fixed rotor to eliminate that as the possible problem.

Finally there is a troubleshooting thread on The Samba:

http://www.thesamba.com/vw/forum/viewtopic.php?t=482560

Good luck,

Darryl