what could cause this engine rattle under narrow throttle only?
Thread Starter
Honda-Tech Member
Joined: Feb 2002
Posts: 2,692
Likes: 1
From: Behind The Camera,, FL, USA
The engine makes a rattle on narrow throttle,
at WOT it makes no unorthedox sound. VTEC
has been disengaged by the ECU and before then
it was intermittant and making a snapping sound
on the left side of the motor, I heard this while
driving. this sound happened on the cam switchover
at 4500 on WOT and 5000 on narrow throttle. this
has been this way since wed of this week. no power
loss outside of the fact that I detuned the car to
0,0 cams, 16ignition timing to save the wear on my
parts. I also did this and re-adjusted my valves to make
sure they were solid. the car has 49500 and idles smooth
occasionally heats past 1/2 and has 205-220 in the cylinders on a B18C1.
This problem came up after I ran my lashes too tight by accident. now at narrow throttle, I get this rattle which sounds like a marble in the engine no matter where in the revband on the narrow throttle. when I snap it open, it goes away. the car has fresh 5-30w oil and over 4qts.
GRRR!?
oh yeah, and VTEC isnt working anymore my computer took it from me. I have the 5K bounce and a CEL.
at WOT it makes no unorthedox sound. VTEC
has been disengaged by the ECU and before then
it was intermittant and making a snapping sound
on the left side of the motor, I heard this while
driving. this sound happened on the cam switchover
at 4500 on WOT and 5000 on narrow throttle. this
has been this way since wed of this week. no power
loss outside of the fact that I detuned the car to
0,0 cams, 16ignition timing to save the wear on my
parts. I also did this and re-adjusted my valves to make
sure they were solid. the car has 49500 and idles smooth
occasionally heats past 1/2 and has 205-220 in the cylinders on a B18C1.
This problem came up after I ran my lashes too tight by accident. now at narrow throttle, I get this rattle which sounds like a marble in the engine no matter where in the revband on the narrow throttle. when I snap it open, it goes away. the car has fresh 5-30w oil and over 4qts.
GRRR!?
oh yeah, and VTEC isnt working anymore my computer took it from me. I have the 5K bounce and a CEL.
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