Hey guys, having some thoughts about the car lately as it just isn't running as it should be. It's nothing terrible, it just isn't pulling like it should be. The reason I know is because when I disconnect the negative on the battery and reconnect it the car runs beautifully... For a while!

Now I know the computer has a lot to do with this but I have a theory that the fact that the car CAN run well after disconnecting the battery rules out certain things (please correct me if I'm wrong here...)

1. Valve clearences.
2. Something physically wrong slowing it down (brakes/wheel bearings whatever)
3. Fuel system issue????
4. Poor engine condition (compression test turned out V-well)
5. Engine mounts (one is leaking but seems sturdy still!)

What else could possibly cause the car to gradually go back to its normal self and not give the same power output and throttle response? The idle also worsens gradually.

Oh I'm using an EAT chip at the moment incase you don't know and for a while after disconnecting the battery it does run well with a lot of power...

Man many thanks in advance for any thoughts...