Erratic RPM at 3000

integrainside · Post by **integrainside** » Wed Mar 17, 2010 7:57 pm

I origionally had a problem with a Blox throttle body sticking. Could never get it resolved so i bought a new BDL throttle body. After i put it on the sticking went away but i have a new problem. The idle is higher, 1200 rpm, was 1000 rpm prior. and when i hold the gas at 3000 rpm it stays for a sec then drops to 800 then back to 3000 then down to 800, and so on. But if i hold it at 4000 it stays just fine. checked for vacume leaks all around. tried new gaskets, nothing helped, so i tried using hondbond with no gasket and same result. Did voltage checks on IACV and it checked out fine. Could this be an ECU problem? Any advice?

PS- this is a B18C fully built Turbo race car, no a/c power steering ect.

Post by **Spunkster** » Thu Mar 18, 2010 9:16 am

No, the throttle body may not be sealing properly when the plate is closed. This is common with aftermarket throttle bodies. Also make sure you have properly adjusted the TPS sensor and calibrated it in the software.