SPITTING CARB - 914-6 all stock, Need assistance - please see latest post to this thread Options

[ctc911ctc]

1970 - 914-6 All stock

Got the car off the rack after a 1 year clean up documented here:

http://www.914world.com/bbs2/index.php?sho...3371&st=100

- tightened the lugs, check one more time for leaks.......

Car started first try, backed out of the driveway and went around the block

Drive strong.....very strong......

#2 cyl-carb is still 'spitting' definitely not backfiring. Chasing this through my trusty guide:

https://www.performanceoriented.com/special-procedures-1

See "notes" section

Seems that when I performed the Lean Best Idle procedure #2 failed during the procedure......the diagnosis within the document states that either the path in that carb #2 is blocked or the jet is the wrong size - my bet is a clog......though the carbs were very clean when I got the car.

There is a little noise from the right side, that in a 914-2L 4Cyl would be considered quiet, my hope is that it is not valve noise and may be exhaust leaking......did I tighten the heater manifold small nuts????? dry.gif

Carb advice sought from those that have chased a SPITTING Carb

[Superhawk996]

Anytime carbs are apart it’s good standard practice to verify all passages are clean and clear. Blow air through and/or use carb cleaner with little red straw to blow through passages.

At a minimum verify jet size by numbers stamped on them. Even better to use jet drill gauges to see they are same size as stamped. Unusual to find them drilled by someone previous . . . But I’ve seen it in carbs I’ve worked on.

Use real ether starting fluid and spritz it around throttle shafts - look for a significant idle increase that is different in #2 vs its adjacent barrels.

Goes without saying - make sure valves are adjusted properly on #2. In my experience bad valve adjustment is more often the source of “spitting” than lean mixture problems. Since I have a leak down gauge; personally I’d leak down #2 just to listen for any valve leakage in addition to the verification of valve adjustment (ie can have properly adjusted but still have poor seal at the valve face).

[infraredcalvin]

Goes without saying - make sure valves are adjusted properly on #2. In my experience bad valve adjustment is more often the source of “spitting” than lean mixture problems. Since I have a leak down gauge; personally I’d leak down #2 just to listen for any valve leakage in addition to the verification of valve adjustment (ie can have properly adjusted but still have poor seal at the valve face).

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