Why would a Chevy truck go 0-60 in about 28 sec's with a constant popping noise while accelerating and a top speed of about 40-70kmh?
If the noise is from the carb or(FI) it's a intake valve-OR a pumped UP hydralic lifter could cause that-OR even a piece of Carbon STUCK under the Valve can cause it.OR a bad rocker arm and/or push rod.
What would cause a 2000 Chevy Astro to drop in oil pressure and produce a 'popping' sound when accelerating - yet not trigger a 'check engine' light?
Not 100% on this but I would pull the plugs and compare them to [http://www.hioutput.com/tech/plug.html These Images]. But it sounds like your van is misfiring and the lose of oil pressure could indicate several things like worn bores/piston rings or valve guides. Good Luck and Remember. Change Your Mind, Not Your Oil. Use the First In Synthetic Motor Oil's. See My Bio For more information.