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Re: very lean problem cont. (archive)

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Posted by Frank on December 24, 1999 at 19:43:35:

In Reply to: 32/36 very lean problem posted by Frank on December 22, 1999 at 18:06:16:

Had some time today to check out my wierd 32/36DGAV with the additional suggestions of Mark, Darrell and Ron (Thanks guys!)

I found the primary side idle jet - right on the end of the cut-off solinoid! (duuuhhhhhhh....) It is a 60, and I might try drilling it out to a 65 or 70, but I don't have any spares. What do you guys think?

I have some spare parts from a friend, so I put a 135 Main jet in the primary side to see if I could get the high speed rich side down a little - that works.

I also had a 135 air which I put into the primary side to see if that would richen the light throttle side - that helps. It runs quite a bit better, reading more toward the normal on the O2 sensor (still lean on the Hall, but the Hall doesn't seem to read much until it is getting well above stociometric.)

Next step I think is I'm going to put some 90 wt oil on the throttle shaft to see if that will temporarily richen it up to check for worn shafts. Don't know if that will do it, but going to check.

Had the carb apart and checked out the passages, they seem to be perfectly clean. Also measured the slop in the shaft at the venturi with the end of a dial caliper- about 0.006 inch, which by the book is about right, I think. Webber book says 0.006 to 0.012, but not sure how they measure that.

Any additional ideas appreciated.

I must say, having an O2 sensor makes a BIG difference in seeing what is going on!

Frank (and the sick '71)

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