That car has on board diagnosis level 1 (OBD1) which is pretty primitive but may show you the problem Just a guess distributor issue if you have higher mileage. To get Check Engine Light codes look at
http://www.troublecodes.net/acura/
There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online
If check engine light on, you can follow these tips to check your car: 1. Check your dashboard gauges and lights for indications of low oil pressure or overheating. 2. Try tightening your gas cap. 3. Reduce speed and load.
If didn't work, you need to read the fault code, get to know where the trouble is and fix it. The Acura H685 may be helpful if want to fix troubles by yourself (http://www.chinasinoy.com/wholesale/honda-acura-professional-tool-h685-1166.html).
PS: 1990 Acura is too old, it may be difficult to find a suitable diagnostic tool for it.
Hi, 1990 Acura Legend L - Thanks for the info. I used the OBD1 and it first flashed one time so I changed the front O2 sensor. After that it ran the same and then flashed two times so I changed the rear O2 sensor. Then when I tried again, it flashed once going back to the original issue? I also changed the spark plugs, wires and the fuel filter. It starts up and when idling it wants to die. When I apply the gas it drops power drastically and tries to die. It also smells rich in gas. Do you still think it may be the distributor? It does have high miles and it doesnt appear the last owners replaced or did regular maintenance on the car. Thanks