In article , clare@snyder.on.ca   
   wrote:   
   >On Wed, 05 Oct 2011 03:42:25 GMT, someone@some.domain   
   >(someone@some.domain) wrote:   
   >   
   >>In article <0ean87hqkt0vlopphhvsapvqsoijj0bqoa@4ax.com>, clare@snyder.on.ca   
   > wrote:   
   >>>On Tue, 4 Oct 2011 08:34:22 -0700 (PDT), imola23@msn.com wrote:   
   >>>   
   >>>>My 87 22R w/carb exhibits an extremely lean condition.  Here's the   
   >>>>long story.  I installed a rebuilt carb years ago due to the original   
   >>>>carb being all carbonized and  gummed up and not allowing the   
   >>>>secondary to open.  Symptoms were very poor gas mileage and black   
   >>>>smoke out of the exhaust  After the rebuilt carb installation the   
   >>>>truck never ran right.  Symptoms were: NO power during normal   
   >>>>acceleration; pushing the accelerator further made the truck go   
   >>>>SLOWER.  When pumping the pedal with little pumps of the pedal   
   >>>>(squirting gas into the primary), I could feel surges of acceleration   
   >>>>with each little pump.  As expected, no amount of idle screw   
   >>>>adjustment had any effect.  Basically the truck was almost undrivable   
   >>>>and the carb vendor showed NO concern.  Out of desperation I rigged a   
   >>>>short piece of thick wire to hang down into the secondary and keep the   
   >>>>plate from opening more than 13/32in.  With that setup it would drive   
   >>>>acceptably but mileage suffered and reading the plugs showed the   
   >>>>mixture to be rich.  So I removed the vacuum cap on the upper-most   
   >>>>capped port of the three capped ports on the passenger side of the   
   >>>>carb.  The mileage improved a little (18mpg) and  the plugs looked   
   >>>>better.  I have been running it like this for a couple of years.  But   
   >>>>recently it's been stalling while idling and backfiring during   
   >>>>accelerating.  The secondary was beginning to get sticky.  So just   
   >>>>yesterday I installed a new rebuilt carb and I was hoping that the new   
   >>>>unmodified carb might be the answer.  No luck; the lean condition   
   >>>>problem remains.   
   >>>>   
   >>>>I will accept any and all diagnostic suggestions.   
   >>>  You need to make 100% sure you don't have any vacuum leaks, and that   
   >>>you DO have the right carb. The 22R engine was not known for carb   
   >>>problems, on the whole. IF you are SURE you have no leaks,and have the   
   >>>right carb, you need to check the number on the primary and secondary   
   >>>main jets, and then obtain a set of larger jets. IIRC Holley jets fit   
   >>>- cannot remember from what carb - but I THINK it is the ones from the   
   >>>holley single barrel carb used on Dodge slant six and AMC engines - if   
   >>>you can't get spare Toyota ones. I have drilled jets in the past with   
   >>>good success - but you want a fair number of off-sized spares if you   
   >>>go that way. The primary main is likely about 2 sizes small for ideal   
   >>>driveability, from past experience.   
   >>>My suspiscion is you have a 20R carb if it is behaving as badly as you   
   >>>say.   
   >>   
   >>main was fussy about the filters.  if i remember, there are two, one in the   
   >>lines near the carb and one on the frame.   
   >  The filters will cause problems at speed and under load - and a   
   >second or two after hitting the gas. - but a good idea to check fuel   
   >flow and pressure to be safe.   
      
   exactly, listen to the man.   
      
   --- SoupGate-Win32 v1.05   
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