Your described symptoms they can be your electric fuel pump or fuel filter. These parts are high replacement items. To be sure of failure you will have to monitor a fuel pressure gauge while in operation. Make sure the fuel pressure, under load stays within specifications. If not the fuel pump is bad and needs replacement.

Check the fuel filter, fuel pump and fuel pressure regulator to make sure they are all functioning properly. Also, check the catalytic converter to make sure they are not plugged.

1985 Olds Delta 88 307 mileage: 129,000. My car has had problems accelerating. It seems to be doing fine when I am around town but when I get to the interstate, that is when it does not go and seems like it is missing or something. I thought I needed a tune-up so I got it done and the problem still continues. Somebody mentioned to me that it might be my fuel filter. I just got my fuel pump replaced also. Please help me. Thank you so much for your time.

If the car is only going 10 mph in second gear and the engine rpm is close to redline, the clutch is slipping do to excusive wear. Check to replace as needed.

1995 Dodge Caravan 2.5L mileage: 59,000. Under light acceleration, when warm, with or without A/C, the engine seems to starve for fuel. The power just goes away. The engine never stalls. If gas pedal is depressed the power returns and away I go. The local Dodge dealer says the EGR is faulty. This engine has no "Classic" EGR that I can find, or that is listed in the repair manual. Over the past several months the following items have been checked or replaced: Fuel pressure, idle position sensor, plugs, rotor, cap, wires, fuel filter, air filter. No error codes are generated in the on-board computer.

Try replacing the oxygen sensor. A weak signal from the sensor may be causing your problem. To test for a plugged converter, drill a small hole in the exhaust pipe right before the catalytic converter. Install a temporary hose fitting and attach a long rubber hose and a 0 to 10 pound pressure gauge. With the gauge inside the car, drive up a hill or accelerate and read the pressure. Normal is 2 to 3 pounds, restricted 4 pounds or higher. The drawback to this method is the small hole will need to be welded shut after the test; a minor job if you have a welder.

Is the car low on transmission fluid? If no, your aunt's car may be ready for a transmission service. Replacing the transmission filter and fluid may fix the problem. After the transmission service, if the problem persists, a transmission overhaul may be next.

1984 Saab 900 turbo 2000, mileage: 160k. I have owned the Saab for 18 months now and recently, over the last 2 months I have lost acceleration at low revs. I have recently serviced the vehicle to manufacturers specification including rotor arm, distributor cap, air filter, oil filter, oil (10-40 fully synthetic), spark plugs and silicone high tension leads. The timing was set to 20 degrees at 2000 revs but the fuel mixture was not touched. When I first bought the vehicle, it accelerated well from any revs and speed but has now dropped off. Incidentally, I have tested the compression and all four cylinders have 190 lbs. I hope I have given you enough information to make a diagnosis and perhaps a remedy.

2000 Chevy S-10 mileage: 50,000. I have a Chevy S-10 with very low mileage. It has no AC. It is in excellent over all condition. Recently I began to have acceleration problems. It runs great when cold and sometimes even when heats up. But most of the time, once it warms up, it pops and sputters on acceleration. I can't figure it out. Fuel pump weak after warm-up! Fuel regulator valve! Electrical! I hope you can help.

Question: 1986 Ford Tempo 2.3 mileage: 68,000. When you apply pressure to the accelerator there is a hesitation, then jerks and then accelerates. I have replaced the spark plugs, plug wires, distributor cap, rotor button and fuel filter. Any ideas? Answer: If the oxygen sensor has not been recently replaced, a new one should be installed. Also, perform a fuel pump pressure test. Clean fuel injection system including throttle bore, idle speed control motor and passages. If the problem still exists, scan the computer for trouble codes.