Yes springs have been changed....Jason said i would not have to get it retuned after valve spring change. but it was doing this before the valve spring issue on the dyno..

 

Some of the springs broke? Some of the springs don't just break unless there is a serious mechanical issue.

More details on your setup please.

 

Im just telling you what happened.. How or why they broke I dont know... The guys at H&H in Haltom City didnt know the reason either the only thing they found was the retainer was bottoming out on the Valve Guide. so they cut the valve guide down .180 and ALL the valves checked out ok..And they put beehvee springs on. The springs that were on the heads were for a .580 lift cam i have a .581 lift and .001 is not going to break a spring. So the heads are fixed..

 

Yes them are my post.. I have fixed ALL mechanical issue's I know of!! Can you think off anything else it can be??? and again been having a problem from start up. The TCC wasnt locking up when we had it on the dyno.. I even changed that Valve..

 

I have a HP File scan of tune.Could someone look at it and see if you may see what is wrong and suggest changes that need to be made..Well I have a file but its to big to attach file even with it a zip.

 

I will look at the file and the log.

 

Seems to me that your cam timing is off, might want to check that out? just to make sure..

 

I bet you put an aftermarket timing set in there? If so, my money's on the chain or teeth having failed and allowing slop between the crank and cam. Unless the cam is super aggressive, the OE GM timing set is plenty.

The first aftermarket timing set I had failed inside of 2000 miles, caused all the same issues you are experiencing (minus snapped springs) and had 18* of play @ the crankshaft.

 

Result of this thread was that I Found out I had a BAD Tune!! Fix bought HPtuners myself!!