Tech Feature: Tips for Servicing Performance Carburetors Carburetors have been around forever, and are still the dominant fuel mixer for most circle track, drag racing and street performance muscle cars. More

Tech Tip: Checking Fuel Pressure Fuel pressure can be checked by attaching a gauge to the Schrader valve fitting on the fuel injector rail, or by teeing the gauge into the fuel supply line if the fuel system lacks a test fitting. More

Cylinder Head Gasket Service Essentials Cylinder head gasket design has become more sophisticated than in years past. Critical steps must be taken during the repair process to ensure ­customer satisfaction and avoid time-consuming­ ­comebacks. More

Performance Mods That Pack a Punch A project car in the form of a WRX/STI shows that Z Sport in Everett, WA, is all about ­balancing ultimate performance within legal parameters and practicality. See what performance modifications the shop has completed with that goal in mind. More

Tech Feature: Valve Seat Selection and Machining The type of seat material that's "best" for a particular cylinder head will depend on the application, fuel used, how much power, type of valves, and longevity and durability the engine is expected to deliver. More

Tech Tip: Hyundai Sonata Runs/Idles Rough/ DTC P0335 Set/MIL ON This TSB has been revised to add a procedure to index the oil pump/balance shaft sprocket. Not properly indexing the sprocket may cause an engine vibration mostly noticed at 3,500-4,000 rpm. More

When Parts Collide: Volkswagen and Audi Engine Repairs In the early 1970s, VW/Audi designed a small, efficient and reliable engine that was easy to work on and made use of the then fairly new technology of a rubber timing belt without the possibility of damage if it failed. This two-valve-per-cylinder engine produced excellent power and economy, and really set the standard that many other manufacturers couldn't match. More

Bearing Down on Engine Damage Internal engine inspections provide clues to bearing failures. More

Tech Tip: Poor Throttle Response on VW's Diesel Engine Condition: Poor throttle response on 1.9L TDI equipped vehicle. Models affected include 1999-2003 Golf and Jetta, 2001-'03 Jetta Wagon and 1998-2003 New Beetle (all ALH, 1.9L TDI engines). More

Fix is a Snap for Noisy Chrysler Vehicles A strange noise while the vehicle is in park and the engine is running may cause concern to owners of some Chrysler vehicles. More