Before we delve into the nitty-gritty, let’s first clarify what these two terms mean. The word “hygroscopic” comes from the Greek words ‘hygros,’ meaning wet or moist, and ‘skopein,’ meaning to look at or observe. On the other hand, “hydroscopic” is often confused with “hygroscopic,” but it...
The first multi-grade oils were developed in the 1950s. They featured a chemical that allowed the oil to alter its viscosity based on temperature. The SAE came up with a number system for this. The first number, the one with the “W” next to it, indicates cold temperature viscosity —”W” for...
Start with the standard trouble shooting items,Tune up parts,dirty/fouled plugs? Are the cap and rotor in good shape? Is thefuel pressure,in spec? When was the fuel filter last changed? Are there any broken vacum lines,Hook it to a scanner,see what live data is telling you.
Another thng to check is the runout on the drive shaft(s) .050 max. Are there any weights missing on the shafts?Has anyone beat on the shaft to change a U joint and dented it at the weld?