89 jetta boggin down when runs for a minute or two

By cycling your ignition key 3 times in 5 seconds command codes to be flashed through check engine light key off,on,off,on then watch lamp first series is the ten digit and pause then single digit So a flash flash pause flash flash pause would be code 22 at the end of display is code 55 (end of message).

the problem sounds like a bad lock up torque convertor.

air filter really dirty, injectors stuck open. fuel pressure regulator is bad.

Change out the EGR valve and it should solve your problem and run like a dream...............Hope this helps you out and get well soon.

The drive cycle is as follows
For all OBD2 VW's

OBD-II Drive Cycle Stages
The OBD-II Drive Cycle is an eight-stage course, as illustrated in the
chart on page 3. An explanation of each step is provided below.
Stage 1: Cold Start-The ECM determines the presence of a cold start
by comparing the engine coolant temperature to the ambient air
temperature during startup. The engine is considered cold when:
• Engine coolant temperature is below 122°F (50°C).
• Engine coolant and intake air temperatures are within 11°F (6°C) of
each other at startup.
During this period, the O2S heater, misfire, AIR, fuel system, and EVAP
monitors run.

Stage 2: Idle 2½ Minutes-Turn the air conditioning (A/C) and
headlights on to help the misfire monitor-the additional electrical loads
help even out combustion pulses. During this period, the O2S heater,
AIR, EVAP, misfire, and possibly fuel system (if operating in closed loop)
monitors run.

Stage 3: Accelerate-Prior to accelerating, turn off the A/C and
headlights (if possible). Open the throttle halfway until you reach
55 MPH (89 KPH). During acceleration, the misfire, fuel system, and
EVAP monitors run.

Stage 4: Steady State Cruise-During this portion of the cycle, the
O2S, AIR, EGR, EVAP, misfire, and fuel system monitors run.

Stage 5: Decelerate-Gradually coast down without applying the
brakes. Also, on manual transmission vehicles, remain in high gear and
do not press the clutch. During this period, the EGR, EVAP, and fuel
system monitors run.

Stage 6: Accelerate-Apply ¾ throttle until reaching 60 MPH (97 KPH).
During acceleration, the misfire, fuel system, and EVAP monitors run.

Stage 7: Steady State Cruise-During this period, the CAT, O2S, AIR,
EGR, EVAP, misfire, and fuel system monitors run.

Stage 8: Decelerate-Gradually coast down without applying the
brakes. Also, on manual transmission vehicles, remain in high gear and
do not press the clutch. During this portion of the Drive Cycle, the EGR,
EVAP, and fuel system monitors run.

You can try this a couple times, but if it doesn't work you should go to a VW specialty shop like the dealer or a shop that does mostly European cars and they can use the scan tool to force the car through readiness.

Make sure that the timing is correct and that the spark from the coil is healthy. Problem can also be with the overdrive in the converter. If it's stuck on it can do that too.

This is a known issue for your model and for GrandAm's. Best to take it to your dealer.

Check the valve timing.You might have some problems with your timing belt or camshaft sprocket. If timing is OK, check the resistance of your TP sensor, specially on the terminals for full throttle. Resistance should be 2 to 6.5 kilo ohms. Lower than this the ECM will not give the right avance ignition timing to your engine. Repositioning the mounting angle may correct the problem.

Working on Mom's car for three days now I've just about pulled all my hair out ! The dam thing would bog as i tried to accelerate over 700 RPM. We replaced the MAP,TPS,FUELPUMP,and i ohm-ed out everything under the hood, and then i found it!! The CRANK POSITION SENSOR had cracks around the base of the sensor and had oil seeping out.Check out pic.I hope this could be of some help...

Don't know if it applies to your diesel but most later gas engined vehicles have a 'cold start' valve that supplies additional fuel to the fuel/air mix along with boosting the idle speed until some warming of the engine is sensed.