I've fitted a brand new Holley 1850 carb on my 302 engine. It is running at about 19" of vacuum at idle. I've put a cable tie around the secondary diaphragm plunger to see how far they are opening and after a fast run down the road it appears that they are not opening at all.
When the engine is not running, should you be able to open the secondaries by hand by pushing on the plunger? I ask because I can't and am wondering if the mechanism is seized.
I am considering changine the springs in the diapgragm housing, but the Holley website/instructions repeatedly say that the carb should be pretty well set up out of the box.
Thanks
When the engine is not running, should you be able to open the secondaries by hand by pushing on the plunger? I ask because I can't and am wondering if the mechanism is seized.
I am considering changine the springs in the diapgragm housing, but the Holley website/instructions repeatedly say that the carb should be pretty well set up out of the box.
Thanks