engine noise

[drftkng951]

so lately i have been hearing a noise coming from my engine bay. i have 91 fastback with a 95 ka in it.
this noise is deffinately only under load when i'm driving with half or more than half throttle. i have revved the motor at idle and the noise isn't there. sounds like a rock or something really loose rattling in the engine compartment.

any help would be appreciated

[evolvedgs3]

pull the head and inspect your jacked up piston (or skirt).

[holybushoffire]

Before hand you could do a compression test and see what your numbers are. You should have severely low numbers in one cylinder.

[drftkng951]

well i pulled the wire on each piston but it passed, i know that doesn't count for much.
is there a way to narrow if it is even piston?

[evolvedgs3]

Dear god,,,,,,

Pull the damn spark plug and run a compression check on each cyl. to see if there is an issue with the piston or rings.

Google home compression check to see what to do.

[sidewaysonmy180]

or it could just be the chain guide. if you dont here it while idling. just pull the cover off. new gasket in hand. and youll see a piece of metal right over your chain unscrew it and throw it away dont put the screws back in throw those away too. happens to most kade. mine did it. only on freeway on ramps that had an upwared slope though.

[mxexux]

Sounds like it might be detonation if its only under load. Does it sound like a ping pong ball is bouncing around in your engine bay?

[drftkng951]

still waiting to get a compression tester