Should my Idle Air Control Valve be ticking....loudly

[BigBen]

I guess the heading just about covers it.

'95 Yukon GT with stock TBI 350 @ 238,000 miles.

Thanks to CK5 I was able to get my TBI base gasket diagnosed and fix it this weekend.

During that process I noticed a pretty loud ticking from the throttle body when the air cleaner was off. Using the stethescope, I determined that it's coming form the Idle Air Control Valve.....

The volume is such that with the air cleaner off I started the truck and as I walked up to the fender I asked "what's that ticking sound?"

So.... normal, or should I replace it?

-Ben

PS> It does seem to have a rich smelling idle and does stutter sometimes at stopsigns and redlights....

 

[4X4HIGH]

That is normal.

 

[BigBen]

Good to know.

It's probably just one of those things I never noticed before until I was looking for TBI issues.

I feel kind of stupid now that I haven't noticed it until now in driving and working on the truck for 10 years and 180,000 miles......

 

[1-tonmudder]

Mine does the same thing.