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

[ctc911ctc]

Hi,

I came back to this car after a few major trips and family events……….

I took all of the plugs out and retested the compression – the engine is super cold (15 degrees out) garage is heated to 40 at all times.

Compression is about the same as listed above – 5lbs less for all cylinders.

I am declaring that compression is not the problem

Next, here are the plugs – the 1,2,3 plugs look good – the 4,5,6 are very heavy, rich

I am going to start over – my sense is that it should be possible to get this car to:

Prime sensibly – fuel pressure and then couple of pumps
Start with a couple of cranks
Sustain the running while in high manual idle until warming up
And then, can idle smooth and clean at 900

Here are some pics of the plugs – what would you do next? Ignition?

Plugs 1->6, L->R









Respectfully,
Cary Conrad

[porschetub]

Hi,

I came back to this car after a few major trips and family events……….

I took all of the plugs out and retested the compression – the engine is super cold (15 degrees out) garage is heated to 40 at all times.

Compression is about the same as listed above – 5lbs less for all cylinders.

I am declaring that compression is not the problem

Next, here are the plugs – the 1,2,3 plugs look good – the 4,5,6 are very heavy, rich

I am going to start over – my sense is that it should be possible to get this car to:

Prime sensibly – fuel pressure and then couple of pumps
Start with a couple of cranks
Sustain the running while in high manual idle until warming up
And then, can idle smooth and clean at 900

Here are some pics of the plugs – what would you do next? Ignition?

Plugs 1->6, L->R









Respectfully,
Cary Conrad

Are those plugs any good they look old to me ? see they are Bosch ,looks like the worst 3 are fouling, have you checked for a good spark @ each cylinder ? ,is your CDI wiring good ? points set up right ?
Did you set the float heights correctly and what gauge did use ?,check to see if you have no spill over into the throat's under some throttle that will cause the very rich condition you have .
Don't for a minute think that previous work on the carbs has been done right ,pay to add the following ;
Vent size,
idle jets,
main jets,
air correctors,
emulsion tubes .
This would help a lot ,good luck and report back.