as driving my car

[chestersnet]

hiwasdriving my car and started hearing a knocking noise around 2500-3000rpm

hear the noise as i am easing off the gas as wellcar pulls ok no problems

need help ... has anyone have any ideas
Modified by chestersnet at 4:36 PM 1/23/2007

[cheapscheisst]

probably fuel and/or timing issue

[Blown240sx]

only when you let off the gas? Do you have a Walbro Fuel pump? Either you have something loose or its a rod knock. Rod Bearings will only knock at certain rpms at first then slowly get worse. If it is RPM dependant and your fuel is ok and everything is tight then you need to tear the bottom end down and replace the rod bearings.