Chattering sound and hesitation.

[OldSkoolDrift]

The motor has developed a hestitation upon applying the throttle. Then it makes a gasping sound from the intake. We adjusted the TPS and it seemed to help a little.

A seperate issue is that it has developed a chattering noise from the head and we cant seem to pinpoint where its coming from. We pulled off the valve covers and turned the motor over, with no fuel or ignition of course, and everything seemed fine.

Anyone got any ideas of what might be causing any of this?

 

[Dunckel]

like valve tick?

 

[OldSkoolDrift]

yeah at first but now its a pretty fast chattering sound....

 

[Dunckel]

are your shims to spec?

 

[OldSkoolDrift]

i dont know. I am trying to find out where i should look at for the problem. I would suspect the shims are good. It ran fine and then it all of a sudden, after my friend goosed it, started chattering. He did a 1st gear burnout with no tachometer and i think it may be a valvespring retainer

 

[starscream5000]

Have you tried taking a stethescope to the running engine to pinpoint the exact location of the noise you're hearing?

 

[OldSkoolDrift]

yeah but it is very hard to pin point with all the other noise....3" turbo back exhaust, dual FAL fans, etc. But it only has a tick at idle and when you apply the gas pedal it turns into an awful sounding chattering sound.