Having problems with your 1993 Buick LeSabre ?

My mechanic tells me that the computer "E-Prom" is bad in my 1993 Buick LeSabre, and that he cannot find one. The vehicle seems to run rich and he says that the E-Prom is bad. We have already replaced the throttle control module and the oxygen sensor because the engine would intermitantly idol fast and the "Service Engine Soon" light would come on then go off .

Posted / edited by AnonymousUser on : 03-08-2020

Answers :

Ok, If you have 2- 02 sensors, the front sensor does the primary fuel adjusments and the second one basically monitors the cat conv efficiency and trips the light. So the front, or #1 02 sensor shoul be changed also. E-proms to me are. "I don't know what is wrong" part that can never be found.The Mass air flow sensor will also adjust the fuel improperly if it is faulty or dirty. It is normally mounted in the intake ducting in a metal section. It measures the air density and volume and adjust the fuel to get the proper air fuel ratio. Sometimes, it can be in the air cleaner box. If you can locate itm it can be cleaned with CRCelectrical spray cleaner. Do not touch, rub, or brush this very sensitive sensor. The cleaner will dry on its own so no compressed air should be used. They are the most expensive sensor to replace. No need to remove it from the mounting either. Chk the connections first. Ensure it is clean and firmly plug in. Good Luck, Ned
You may have to get a whole computer out of a junk yard,and hope the prom will work,and on that car,it should.
Repair Help & Product Troubleshooting for 1993 Buick LeSabre

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