RPM problem

[blue700]

just installed 75mm tb and plenum, now my car is coded and when i rev it up andtake my foot off the gas it will hold the rev for a couple seconds and then very slowly start to drop, and when i let off to shift in normal driving it will jump 5-600 rpm all on tits own.

 

[blue700]

damn nobody knows?

 

[MachME]

the TB must be sticking.

Go over it again and see if you can fix it.

 

[blue700]

itsnot sticking, because ill doit manually under the hood and it will still do it, btw its me skatermckimm

 

[STAMPEDE3]

TPS voltage?

 

[blue700]

i took it to a ford dealership, and they cheked the ohms and shit and said it gives a reading, i think its the wrong throttlebody because the silver pin at the end of the throttlecable wont even fit in the hole on the butterfly for the TB.

but the pedle position sensor i believe is bad because with the stock throttlebody on there is still reads low circut and high circut for PPS.