Hey whats up guys posting this up for my friend. He has an ls vtec setup that includes the following:

Ls block
Bottom end stock with 12.5 compression Je pistons
Gsr head
Skunk 2 Intake manifold
2.5 inch custom exhaust from the header back
2.5inch Air intake
Aem Fuel Rail
Everything else is stock Gsr head = stock
Ls block = stock minus pistons

He just changed the tps because it was going bad. Since he changed the tps it has been idle surging from 1400-~3000.

I was wonderign what could have causd this? I check the vacuum's, they all looked good. I messed around with the idle screw, and it didnt have any effect. COuld the throttle body be bad?
Any and all info is appreciated and i thank you for your time.

 

I think I have the same problem dude!

 

have you checked the iacv? also try cleaning out the TB

 

i think its just hte throttle body gasket b/c i know i put mine on the wrong way and it was idling very high, i will try to change that and then i will get back to you guys thanks for your help

 

had the same problem on my gf's prelude. found out it was the fast idle valve fast idle valve. hope that helps

 

i messed with the fast idle valve

 

Is the tb obd0, 1, or 2? because the iacv is different to make better emissions. I quote from Bindegal at pgmfi.org:

My theory is this:
As the 1996--> engines have no fast-idle valve, the IACV flows more air than its OBD1 counterpart (because it will need to open up enough to allow fast-idle as well as maintain a normal warm-engine idle speed). So when the P30 code opens it up, more air rushes in than expected.

Now that would hold true with IACV's being different. We're tryin to figure this out with p30 maps. Obd1 IACV can adapt to Obd2 but the other way is a problem. That is why we are having problems running the p30 map on post 96 engines converting to Obd1.