Loud Knocking Sound- NEED HELP!

Just recently a loud knocking sound coming from inside the motor has been coming apparent. It isnt a lifter but more of a louder metal knock sound. It sometimes when I start it has trouble idling and as I watch my tacht it bounces really fast between 200 to 1,200 rpm's and then stops bouncing back and forth after a little while. The CEL has also appeared on the dash. I don't know what else to say and if you have any questions please ask. And be gentle. :frown:

Lets hope you didnt spin a bearing like i did a while back:frown:

most likely is. its not uncommon. just pull off the oil pan an check to see if any rods or loose.

How about you start with the obvious, and pull the code for the CEL.

^^^ Because every time I turn the car off it disappears when I start it up for next time. And then after running it for about 2 minutes or so it comes back on. The CEL light has actually done this before and then disappears once the ignition switch is flipped. Sorry for not being more specific, I was very tired when I wrote this thread.

That maybe the case, but if it came on, it's still stored in the ECU, and it still came on for a reason. LOL. Go pull it.

Alright, yes a newbie question. I dont care. I did a google search and didnt find anything. I then looked in my manual and it said if the CEL comes on take it to a dealer. Can someone give me a link with some good directions on pulling the ECU so that I can get a code and diagnose this. Its getting louder and louder.

YOu don't need to remove it.

http://www.stealth316.com/2-diagcodes91-93.htm

Double check you have the right pin for the ground

http://www.stealth316.com/2-diagconn.htm

Here is where a datalogger comes in handy, if you can find a local member with one, that is alot quicker. But if not, the method above works fine.

Dealer will charge you $70 to pull a code, and then no matter what is wrong, will tell you you need a new tranny, driveshaft, headlight fluid, and alternator, but luckily they can do all of that in just under a month for the price of your soul and first born. Stay away from them. I'd rather let a toddler fool around under the hood, in the long run it will probably do less damage and works for fruit loops.