1994 33 Dual Carb Problems .. Pinking and Stuttering ! - Alfa Romeo Forum
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Hmmm 1994 33 Dual Carb Problems .. Pinking and Stuttering !

Good Evening Lads,

Well I happened to notice after a little bit of driving my Dad's Fiat Uno that when I apply a high gear under load the engine / distributor manages to compensate by advancing or retarding the Ignition timing hence the posibility of running on 99 - 95 Octane.

My 33 using 98 Octane (Most prob its 96-97ish as Malta Mixes are way off) doesn't do so. If I am on the 5th Gear and loose power the engine pinks and stutters and doesn't compensate like the Fiat Uno. I had a go and drove my 1982 Sud and did compensate like the Uno too. So now I am guessing that there is something wrong with my 33. I have the twin dellorto carb model.

In order to eliminate pinking even on lesser loads I added Octane Booster to the fuel and now no more pinking but it still doesn't compensate on the load like the other cars. I know that the twin carb has alot of tubing and that only one tube is connected to the Vaccum advance on the Distributor. Now I replaced the hose as it was cracking but didn't change a thing. So now I am wondering is it the Distributor, the Ignition Module or the Carbs ? I've had them rebuilt from scratch a few months ago so i can rule the carbs out. So can the Distributor Diaphram go bust ?

Any Ideas Guys ... Thanks !
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Re: 1994 33 Dual Carb Problems .. Pinking and Stuttering !

It sure can. I've replaced mine already, and i've also had issues with grease going hard in the distributor, so the centrifugal advance is sluggish. Pulled it out, cleaned & re-greased it & it's running great again.
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1994 , carb , dual , pinking , problems , stuttering

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