Car slowed down 2 tenths..Advice?

[Johnny Rod]

Had the same problem with a zz 4 with a hot cam kit.. Valve springs went away.

[hookdaddy]

Sounds like the convertor to me too Rob. Drain the trans fluid, see if there's metal in it.

[Charlie Yannetti]

Now, I'm not going to say it's not the converter, but I have been told on numerous occassions that I had a converter problem, only to find that I just should have checked the valve springs, or spark plugs... they are easy to get at, and fairly inexpensive to replace.. OR, you could break your *** taking the trans and converter out only to find from your builder that they are fine.. unless you put someone else's headache in your car... just sayin'...

[Pony Pilot]

I had a similar problem. Found out when I sent the converter back to be freshened up that I had ripped several fins out of it. No metal in the fluid, it still appeared to stall okay, but ET dropped out several tenths over the season. Good luck.

[MadMax404]

I had this happen before and it not be the convertor....after I pulled the convertor twice. It is probably a long shot but I would atleast check the throttle linkage(especially if its a cable). My throttle cable stretched causing the car to slow without any real symptions or notices. Just something to check before tearing into stuff, but its probably the convertor.