My wife's 2000 Toyota Corolla died today when she was at a stop light. She had to start it again and was able to drive but it has some hesitation problems and poor acceleration at times. I did remove and clean the MAF sensor before and it helped for around a day then started to do the same thing again. The car has over 100,000 miles with the original spark plugs. Here are the error codes I found when she got back. P0171 System Too Lean (Bank 1) -FREEZE FRAME DATA- Fuel System 1 Closed Loop Calculated Load 40.3% Engine Coolant Temp 186 F STFT Bank 1 3.1% LTFT Bank 1 29.6% Engine RPM 2947 RPM Vehicle Speed 50 MPH Intake Air Temperature 66 F Also got a P0300 Random Misfire Detected which is a new one.

I would use the same plugs as were in there,, the fuel filter is a canister located either at the firewall or fender well,, its a black canister type,, from under the car you can see the fuel line coming up to the front of the vehicle,, Loosen the lower line first its gonna leak some so be ready for that ,, then the top one, as far as the MAP ,, its a good idea to replace it since the cleaning lasted one day I would use the same plugs as were in there,, the fuel filter is a canister located either at the firewall or fender well,, its a black canister type,, from under the car you can see the fuel line coming up to the front of the vehicle,, Loosen the lower line first its gonna leak some so be ready for that ,, then the top one, as far as the MAP ,, its a good idea to replace it since the cleaning lasted one day

FYI the 2000 Corolla does not have a serviceable fuel filter. The only filter in the system is the pickup sock in the tank. Horrible oversight by Toyota. FYI the 2000 Corolla does not have a serviceable fuel filter. The only filter in the system is the pickup sock in the tank. Horrible oversight by Toyota.