When the Engine Warms Up? Try the Cam Position Sensor, Coil Pack, Coolant Temperature Sensor, or Intake Temperature Sensor Perform a compression test, then a leak down test
White Smoke from Tail pipe? Head Gasket Leak, could also make the car run hot
Hesitation?
Try Ignition Coils, Fuel Pressure Regulator, Mass Air Sensor, check for a Vacuum Leak, Check PCV Valve, Fuel Filter, Fuel Injectors, Throttle Position Sensor, Head Gasket, Catalytic Converter
Erratic Idle?
Try Checking for Large Vacuum Leaks, Mass Air Sensor, Idle Control Valve
Flat Acceleration?
Try replacing your ignition coils, Mass air Sensor, Throttle Position sensor, look for vacuum leaks, Check for escaping crank case pressure, Catalytic Converter
Blue smoke out of tail pipe? Pull apart engine and replace piston rings
Is it Leaking? Look around the engine for oil leaking Try the Valve cover gasket/ Spark Plug Tube Seals Check Oil Filter Housing Inspect Oil Pan
Gas Mileage Drops
Has it Dropped 4-6 MPG? Try the Fuel Filter Try a Tune-Up
Has it Dropped 1-3 MPG? Try a Fuel Cleaner Try Your Air Filter Check fuel pressure Check for codes Inspect Tire Pressure [Pressure located on drives side door jam plate]
Car Pulls To one Side
While Driving? Try an Alignment Inspect Tie Rods [Inner and Outer] Inspect Wheel Hubs for Play Try Having the Wheels Balanced
While Stopping? Inspect Brakes and Calipers Check Rotors for Warping
Test Try Jacking the car up on one side. With the wheel in the air, push on either side left to right trying to shake the wheel.
Is there Play? Inspect your Inner and Outer Tie Rods
Nothing? With the same tire still Jacked up, push on the top and bottom of the tire shaking it.
Is there Play? Inspect your ball joints and control arm.