RE: IML: 72 Runs Bad, Usually

[David Whitney <hazegreen66@xxxxxxxxx>]

The carb tuning garage would have caught all that, unless they're just boneheads masquerading as experts.

 

Carbs don't just take a dump like that.  Something else is happening that causes a change to mixture and/or timing, making the carb adjustment that works one day moot the next.

 

First, a dumb a$$ question.  Do you buy the same gas all the time?

 

Now the not so dumb questions:  Is your valve train geometry properly adjusted, i.e. spring height/strength, and are your valves tight in the guides?  Is the fuel pressure steady?  Is your timing mark jumping around?  How's the chain?  Weights inside the distributor?  Distributor drive gear/bushing?  Again, these are things the experts should have caught, but it's a little beyond carb tuning 101.

 

Happy motoring,

 

David

Robin Giesbrecht <robings@xxxxxxxxxxx> wrote:

>     Nope the carb is not too big. Check the vacuum on this engine. And if nothing else cap those lines that were going to the cannister. But check the vacuum. Should be pulling 16-20 and steady at idle. If not you have a carb to manifold leak probably.
>  
> Robin Giesbrecht 
> 1972 Imperial

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