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]

Code 72 is probably just the thermistor bad on your egr system. you can bypass that by just shorting out the two pins for said sensor. Code 51 is probably a bad knock sensor. you'll need to replace it. But, first i would check if its even plugged in. its on back of the block, under the intake manifold.