tps fault.

[avaconirl]

DO you have full engine power?

first Santana ever. welcome ! !!!!
, 8v , EFI ,code 45, if that code repeats, after the reset with DOme fuse, its real
Idle Switch Circuit , grounded all the time. Part of TPS sensor. (too low) or Maladjusted.
The ECU never lies, here,

setting the TPS idle switch is daunting. (or its even bad.) it must be calibrated with the Dashpot retracted.
the first step are to see if it even works at all..
http://www.fixkick.com/sensors/tests/TPS...tage_tests




keep in mind surging , has many causes. [b](lean or ECU caused?)[/b?
1: TPS dead or not calibrated or wrongly
2: lean Air fuel mixtures, all cause surge and bogging. (say a clogged injector)
3: some intake air leaks, if the leak varies, say a gasket is broken and fluttering open and closed. stuff happens.
4: dash pot not retracting after 5 to 30 seconds on a startup. The ISC will hunt.

the 8v TBI , always races fast , with any type of air leak.

if the leak gets excessive the IDLE speed controller (ISC) will go nuts trying to gain control of idle and then hunts to find it. (the software servo loop does that magic)


is DP retracted, (1 second look bam)
are the throttle cables slack per FSM, not tight. (up to 3 cables with cruise and A/T)
does the throttle plate (brass plate) in the TB fully close 100% with DP retracted by hand engine off? key OFF> Yes/no.
those are first checks there are more.

the TPS checks are here
http://www.fixkick.com/sensors/tests/TPS...tage_tests

Thanks for the reply, I have followed the instructions on setting the tps as described on the fixkick site. The odd thing is that 1 time in 5 times I drive the car it will behave it's self and drive great. When it has the problem it has full power as always. When I lift off the gas pedel for a junction or the like I can feel a sudden deceleration rather then a gradual slowing down. When you are at a junction trying to move on the car will jolt and hop like a kangaroo.
I hope this may shed some light on the prob
Thanks.