Code 181 for 1994 Ford Escort 1.9L accompanied by hesitation and cutting out.
Question:
This Ford Escort would hesitate when running at highway speeds as if the engine is running out of gas. When this happens, the engine would also stall and finally quit. It will re-start but it has no power. She had the IAC (Idle Control) valve replaced but the problem remains and she asked for my help. I plan to do a major tune up like spark plugs, wires and fuel filter. What bothers me though is when I scanned it, it has code 181 which showed cruising rich and bank 1 lean. Suggestion?
ATS Adviser:
First of all, check the vacuum leak which can cause your engine to run lean. Next is to check the voltage readings of your oxygen sensor and see if it fluctuates. This sensor seems to be a common culpit on this especially with this code 181 and the symptom of hesitation. Try checking these:
Service the mass sensor for dirty wire elements
Check the fuel regulator for diaphragm fuel leakage
Check pcv valve for crack that would cause vacuum leak
Note: when testing vacuum leak, use a water bottle spray mist. When you hit the leak, rpm should change during idle.
ATS Tip:
A bad running oxygen sensor can disrupt your fuel mixture and would cause hesitation and loss of power.
