Sorta Cobra....this only happens to me!
 

These things only happen to me!
As I may have told you all, I decided to go back to the stock cam in my ’93 Cobra Mustang. (it was an E303)
I did. We drove the Cobra to the Lake of the Ozarks last Friday and it ran perfectly.
It has less HP but much more than just a stock Mustang Cobra. I left the big heads on and the FIPK. Plus '93 Cobra’s have 70mm throttle bodies and mass air. I am guessing it is still around 300 to 310 HP.
Anyway we got back and I noticed a knock coming from the engine compartment, at least I thought so. It’s hard to tell. Sounds like a rod bearing but it is a brand new engine. Maybe one of the roller rockers came lose or I forgot to adjust it properly. You get that when you are old! But I do everything twice to make sure I don’t miss anything. I got the stethoscope out and went all around the engine. I decided to pull the rocker covers and see if any oblivious concerns. Nothing, everything is right. Now I ‘m over and under this thing. What in the world? The rod bearing looks more and more likely. I am depressed to say the least. It is loudest coming from number 1 cylinder. I give it my most attention. I finally noticed the exhaust manifold bolts were missing on number 1. I have MAC headers and MAC headers are singles, no solid flange. The missing bolts let the header flange knock against the head and…well I replaced them and everything is good once again. We are talking probably a 1/16th of and inch or less. That’s all it takes sometime. Man!

You are not alone. It happens to all of us but some more then others.

glad it turned out ok,we all fight the car gremlin now and then .I like blue locktite on bolts and nuts.Have funWB3