Engine Performance problem
1998 Chevy Monte Carlo 6 cyl Front Wheel Drive Automatic 149,005 miles
All of a sudden my Z34 will not accelerate properly. It acts like I am barely pushing on the accelerator pedal while I actually have it on the floorboard! I have had the Catalytic Converter checked (twice) and it is good. My RPM's are not running high nor does the engine sound like it is 'straining', but my gas mileage is horrid. I have not had an Engine Light come on and would like to know where to turn now before I get rear ended in traffic!
Hi ShannonV, Welcome to 2carpros and TY for the donation
Possibilities here: Inspect and test all the following listed below: Oxygen sensor.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Crankshaft position sensor
Manifold absolute pressure sensor.
Fuel pressure regulator leaking or defective fuel pump.
False air leakage.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.
Note: If it doesn't apply disregard it.
July, 29, 2010 AT 11:05 AM
Thank you for your reply and you are welcome for the donation. I have found the problem and it was none of the items in your list of suggestions as I saw the same answer posted to an earlier question submitted by someone else and had already ruled the majority of them out.
The problem is a broken accelerator cable, which for some reason GM has obsoleted and I had to have it ordered from a company back east. In the week of wait time, a zip tie is working just fine to hold it in place and the car is driveable.
Sometimes it's a simple fix and I'm glad that my local mechanic nailed the problem in less than 2 minutes when I told him what my car was doing.