i have a 70 MM throttle body on my JDM GSR motor. This thing always sticks..around .4-.8% throttle with my foot off the gas at idle.

This in turn makes my idle stick around 1300-1900 rpm with my foot off the gas.

I cleaned the throttle butterfly with brake cleaner and lubricated the return spring.

Still sticking at idle. Anyone know a decent fix for this?? It is too expletive anoying at idle.

I have to turn the throttle cable linkage with my hand to make the rpms down.

Also I tried turning down the idle on the idle air control valve....still idles between 1300-1900

 

the same thing use to happen with my edelbrook tb

 

i know 3 guys with those, including me, and they all stick

 

try permanently adjusting the throttle cable. If that does not work, sorry! that's all i have to offer.

good luck with that

 

Replace the throttle cable and do not lube it! or...

When you lube the return spring lube the shaft that goes thru the TB too.
I remove the air intake tube and with a micro oiler I lube the shaft from the inside too. This usually will last a few weeks then you have to relube it.

Or try adjusting the cable so you have a little more play at closed throttle.

My TB is just old and the H dealer wants 485.00 for it. I have been experimenting on what works, and what lasts for a while now. I know it's not an str but the workings are the same.

 

ehhhh i think im fucked.....i might just put a stock one one