1992 Volkswagen Truck

Engine Performance problem
1992 Volkswagen Truck 4 cyl Front Wheel Drive Automatic 285000 miles

my vehical will get up to speed if I am patient. When I accelerate the engine, the vehicle slows down significantly. What may be the problem/solution?
Doug Glpver
April 23, 2010.

Hi Doug Glpver, Welcome to 2carpros and TY for the donation.

Inspect and test all the following listed below and get back with some results

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking or defective fuel pump.
False air leakage.
Fuel contamination.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.

Apr 26, 2010.