Symptoms after V8 throttle body

[V1P_COMO]

hey, i just recently put a V8 throttle body on my vp v6 and also removed my

bellmouth restrictor out of my manifold adaptor. now there is a very high

pitch whilstle coming from the throttle body area, my idle is higher than usual

and my throttle is sticking slightly. i have checked all my vacum lines and

none are makin the noise so i am wonderin if the noise is because of the

bellmouth removal? i also noted that when switching the throttle positioning

sensor, the butterfly went from fully closed to open by about 2 mm, is this

what is causing the higher idol or should i adjust the idle screw? anyhelp at

all will be highly appreciated, cheerz!

 

[stocky]

when you removed the bellmouth and installed the new TB, did you remember to put the gaskets back in?

 

[Doctor Bob]

you shouldnt touch the idle stop screw, try putting the tps sensor on correctly there should be no difference in the position of the throttle blade.

 

[Burt_vn]

Yeah if your throttle butterly is sticking open a tiny bit it will bypass the idle circuit and cause your car to idle at around 1000-1200RPM. try loosening off your throttle cable a little bit, but make sure you arent sacrificing 100% throttle with your foot down. and the whistling will be a tiny bit of a leak, put your gasket back on, or at least use some liquid gasket, its just a tiny hole sucking air.

 

[V1P_COMO]

thanks heaps ay, the problems fixed, i didnt have any gaskets to replace the

old ones so i did so and everythings fine, i got a mechanic friend of mine to

help with the idle issues, he couldnt redo the TPS for some reason but

adjusted the idol screw... no other probs so far... cheers!

 

[redvr]

what size is the v8 throttle body 65mm???
and what was a ruff power increase from the throttle body and removing the bellmouth???
cause im keen to do it!!

 

[stocky]

no difference at all in power from either

 

[holden007]

TB does slightly increase power, you really can't feel it, but you get a touchy pedal.

 

[stocky]

thats just throttle response. it only because more air is able to come through with less butterfly movement. youll get the same effect with a v6 TB if you just push it harder. greenfoam can explain it a lot better than me