Last post on Sep 14, 2007 at 4:23 PM
You are in the Speed Shop Tuning and Modification
What is this discussion about?
Chevrolet S-10, Performance Mods
#25 of 26 Re: BLACK OIL [drcarp]
Sep 14, 2007 (1:17 pm)
Along with the points I raised in the preceding post, there is one other test that's worth doing. With the engine off, take off the covers over the metering rod assemblies, and note the height of the top of the rods. Then start the engine, and see if the rods move to a lower position when the engine idles.
If the metering rod assemblies are always in the up position when the engine is running, then the carb will supply the richest possible mixture at all times; and this will grossly overfeed the engine with fuel.
If the rods did not move down, then they are either stuck, or the rod control pistons are not getting any vacuum. If you can press down on the top of the rods, and they move down easily against their spring, then they are not stuck. In that case, the vacuum passage to the piston well is blocked; either by gasket cement, or by an incorrect or improperly positioned carb mounting flange gasket.
#26 of 26 Re: BLACK OIL [zaken1]
by Mr_Shiftright HOST
Sep 14, 2007 (4:23 pm)
Whatever he does he'd better do it quickly. Having gasoline washing your cylinder walls and bearings is NOT GOOD! This could end up being a relatively low mileage engine.