I'm new here so if any of this sound redundant I apologise.
I am getting the following codes from the ecu my car is a 95:
P0170 - fuel trim malfunction
P0330 - knock sensor 2 circuit malfunction
P0401 - egr flow insufficient
I just bought the car and I have to go through emissions so I have to clear those codes.
I think that maybe the first code maybe that I need to change the fuel filter or clean the fuel system because there is no engine misfire which leads me to believe that the injector may still be good just dirty but if I'm wrong, please correct me.
For the second code I need some help locating the particular knock sensor and to find a place that sells it the cheapest I got $200 from autozone. I used to own a nissan maxima which had a very similar engine as this one and it only had one knock sensor and it was in the oddest position. I also know that when it went bad, the engine lost a lot of power which partially explains some of my powerloss.
For the last code, I think I will clean out the egr valve and see if it will help.
If anyone has had any experience with any of these codes please help any input is appreciated and again I apologise if this is a repost thank you.