Driving the other day. I noticed outta nowhere when I accelerate it makes a funny noise. Kinda like a playin card in a bike spoke sound (we all know we did it when we were kids!) It sumtymes does it at idle and sounds louder when I accelerate. My friend told me its either my headers or collectors are loose and need to be tighten or replacing of the gaskets is at hand. Inspecting the headers they seem fine now the collectors I could believe its that since I have scraped that y-pipe more often than I wish/should and dont have jacks and stands to check it out. My dad says it sounds like a cylinder not gettin any spark but i recently did a tune up and replaced like 2 wires that were fried due to the headers (got all the wires away from headers this problem is solved). One more thing after gettin my alarm installed I got a code 34...seeing how I have an LG4 it would be something up with my MAP Sensor. I believe/hope they would have knocked it offline. Would that has something to contribute to the card in spoke sound? So my question is which of these 3 are contributing to this sound or is it something I missed alltogeher? I know this is long but I wanna get these problems fixed ASAP so I could concentrate on my slowly dieing 700-r4...Thanx in advance people!

 

If you still have an air injection pump (and you probably have to in California) you might be hearing the diverter valve dumping excess air through the muffler behind the pump. If it sounds like a long, extended, unrelenting bout of near-terminal flatulence, that could be the source.

 

Yea I have the air injector tubes on there. If this is the case how would I go about fixing this problem? Im new when it comes to any of this stuff Im learning as I go along. Thanx

 

bump

 

You'll need to find a means of connecting the AIR tubes, through check valves, back to the Hooker shorties. Then you'll need to make sure the AIR diverter valve is operating correctly.