strtracer442 said:
You will need to buy or rent a compression tester and a fuel pressure tester, also get yourself a Haynes or Chilton manual for your car, they will have the instructions on how to do basic testing.
This is some of the best advice you’ll get. Do the simple tests first to get an idea of the basic condition of the car’s engine.
You need to take a systematic approach to fixing you car’s problems: doing so will save lots of money and time. Throwing parts at a problem just makes you poor and tired. Buy a Chilton or Haynes shop manual, or better still, both manuals. Read up on what you need to do, get the parts & tools you need, and then just do it. The Chilton manual is better for emissions & tune up, but the Haynes is better for other things.
First, fix the things that you can see are obviously wrong, like the 24 pound injectors. Do a complete tune up with plugs, wires, cap, rotor, fuel & air filters. Wash the engine down with some mineral spirits or kerosene and then drive it & look for leaks. Fix the leaks and change the oil, wash it down again if it needs it.
Once you have changed the oil & done the simple tests & tune up, do some of the more complex testing. The tune up will fix some of the performance problems and shrink the symptom list down to a more easily managed size.
Don’t let the engine control computer intimidate you. It can tell you what is wrong with the engine if you take time to understand it. If you take some time to read the Chilton manual or better still, Ford Fuel Injection & Electronic Engine Control 1988-1993 by Charles Probst :ISBN 0-8376-0301-3, you be fixing you problems quickly and easily the first time.
The computer’s ability to track malfunctions will be a big help, but do the tune up & fix up stuff first. They will clear some of the diagnostic fault codes the computer will store.
Here's the link to dump the computer codes with only a jumper wire or paper clip and the check engine light, or test light or voltmeter. I’ve used it for years, and it works great.
See
http://www.troublecodes.net/Ford/
OR
See
http://www.dalidesign.com/hbook/eectest.html for more descriptive help
OR
See
http://www.mustangworks.com/articles/electronics/eec-iv_codes.html