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Posted (edited)

I had a issue of surging in my 265 52 dodge PU recently.

Checked the distributor and VA... OK.

Checked fuel pressure...4.6 lbs as always..OK

Pulled the carb top... checked the carb # E7T1 ....correct for this engine setup.  I bought this carb NOS when I installed the 265.

Main and Step-up jets correct #'s and clean...accelerator pump jet strong....

Hmmmmm....then I saw a little steel ball in the bottom corner of the fuel bowl !

It had somehow come undone from it's swaged hole up on the main air bleed circuit! It's supposed to be permanently pressed into the carb bowl body to seal against air or fuel leaks.

I carefully re-installed the steel ball and rolled the carb bowl  metal over it the slightest and now all is good again...NO surging.

I have never seen this happen! easy fix though.

This might be of help to someone else.

B3D Mid Throttle Surging Diagnosis (1).JPG

B3D Mid Throttle Surging Diagnosis (2).JPG

B3D Mid Throttle Surging Diagnosis (3).JPG

B3D Mid Throttle Surging Diagnosis (4).JPG

Edited by Dodgeb4ya
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