New Member, New Problems - PICS ADDED POST 3, 1994 7A-FE with a couple of trouble codes Options

[boony]

So I'm getting code 51 (Knock Sensor) and 72 (EGR system) codes on my 1994 ST auto. I just got the car extra cheap as a beater and frankly know little about it. I know it is not stock.

The car runs (but is slow to me, but that's the nature of it I think). The engine runs and idles smoothly. The AC works, etc. These codes come on at random while driving and stay on until cleared (this has happened twice in my 100 miles of owning it). Gas mileage seems to be superb. The engine temp gauge on the dash barely goes above 1/4 of the way up, and it stays where it is after it reaches that position.

So, 6g gurus, what do you suggest. I will attempt to post some engine bay pics early this afternoon. This will soon be my only car and I need it to run well for at least another 50k miles. It has 190k on it, new belts (including timing), new seals (including rear main), and new gaskets.

This post has been edited by boony: Jul 30, 2009 - 1:07 PM

[stephen_lee]

the wiring does go back towards the engine, but thte plug clips onto the radiator. i know i've owned 3 STs.

the grey and brown unplugged sensors are for EGR.

there is no "elbow" the hole in the box is supposed to go over the thing coming from under/near the fusebox.

ok code 52:

DTC 52 is set when ECM detects an open or short in the knock
sensor circuit with engine speed of 1200-6000 RPM. Check for open or
short in knock sensor circuit, a loose or faulty knock sensor or
faulty ECM.