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Dreaded 2 barrel Solex (archive)

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Posted by Joe on September 08, 1999 at 08:55:47:

Greetings 02 fans.
I have a 1975 02 with the 2 barrel Solex with the electric and water choke, with no warm engine idle. After trying unsuccessfully to adjust the idle, I bit the bullet and rebuilt my Solex (again). After I took the Solex apart again, I discovered that there was a small tear in the intermediate seal. This was at the point where the seal is thin at the fuel bowl (pointing to the front of car). After cutting a new seal out of gasket paper ($2.34 at the local parts store)and recutting the intake manifold gasket to my delight it runs great, and has good pickup and acceleration (even with a three speed ZF automatic). The idle I set by inserting the idle screw approximately 50% into the small hole that sits below the butterfly on the primary throat while the carb was in my hand before mounting on intake manifold. Upon starting car I found the idle was not correct (engine cut out after warming up and the choke was disabled, water and electric). I backed the idle screw out three complete turns, and set in turns until the engine died (engine warm)and then set out 1 complete turn.

The Solex I believe was engineered very well to run with all the smog stuff on the 75 year car. My smog pump is missing and I have no EGR valve. The exhaust manifold has the main smog tube sealed off. I got the car this way. I made no other adjustments to the Solex. I did change the points and plugs and regapped them to the recommended gap and by running the car until acceleration and running speed was correct (took three trys)I checked all the tubing associated with the three magnetic vaccume valves on the firewall and made sure the vaccume tubes were connected according to the smog diagram and basically bypassed the EGR valve. The distrubuter is a 1 stage advance and the vaccume appears to work. Anyone with a Solex equipped car that isn't required to test the car for emissions should try a rebuild if they have stumbling at turns (car cutting out) or poor to no idle. Make sure that all vaccume tubes are in place. Replace the ones with no suction on them. Have fun and save paying 2-3 hundred for a Weber. Buy the way the car does 75 comfortably which is pretty good for a 24 year old automatic car.

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