Knocking from engine while idling

[danthetoolman]

Hey guys i took my car for a test drive and after driving for a bit with no problems i stopped at a light idled for 20 seconds or so and then the car started knocking really bad while i was just stopped at the light. i towed the car back and tried a buddies kpro and same thing. sounds like a hard knock. Ive attached the dattalog from the whole trip i get to the stop light at 6:45 and after that is when the knocking occurs.

- 2004 Honda civic
- kmanager 3.24
- K20a engine, rbc manifold, hondata thermal intake gasket, ktuned tps, hybrid 70mm throttlebody, plm header
hondata itr map that comes with the program

[Spunkster]

What you are describing sounds more like rod knock and you should stop running the engine immedietely and have this checked out before further damage is done.

[danthetoolman]

i also noticed the cam angle jumps to 107 degrees at 7:02 in the dattalog i just did a compression test cyl 1 has 0 compression and the rest have about 150ish.

[danthetoolman]

What you are describing sounds more like rod knock and you should stop running the engine immedietely and have this checked out before further damage is done.

i stopped running the engine immediately plugs are fine but i think it bent a valve on cyl 1 what would cause this based on the datatlog when im sitting there idling?

[Spunkster]

Impossible to say from a datalog. It will have to be taken apart and looked at by a professional.