91 4 cyl idles good but rough acceleration
 

Hi,

Have had my 91 for over three years. She has run perfectly until the other day.

It will start just fine and idle fine. When I go to accelerate it will perform poorly, it seems to be missing and has very little power.

I pulled each spark plug wire to verify that all cylinders were firing. All are firing. I replaced the fuel filter as the fuel filter looked old and that was something I had not done in the three years I have owned the car.

I don't have much in the way of diagnostic equipment and am wondering how to proceed. Money is tight so I don't want to buy parts and equipment that I do not need but am willing to make educated purchases.

Problem is that I have no idea as to how to proceed. I would appreciate if someone could guide me in some troubleshooting techniques that will not break the bank.

Thanks and Regards,
Bruce