3sgte strange problem

[danny2]

this arvo just had another go at sorting out problems on my gt4.. checked compression which was 180-190 allround, and tested isc,tps, timing,plugs and water temp sensor with pretty positive results.. here is perhaps a better explanation or my main problem.. when the car is idleing in neutral if i rev it to 2 grand it will start jumping back and forth from 1500 to 2000 basically revving itself.. if i then rev it to 3 grand it will stop and behave normally.. on the road it is jerky when i rev it in low revs but higher revs are fine.. it also is hunting/missing on idle.. any idea's?

[FASTFOO]

Your TPS is out of adjustment!!
The TPS sends a signel to the computer down the "IDL" wire to tell it the throtel is closed and you want it to run slowly,so the computer rev limits the engine to 1700-1900 rpm.
If it is not set right the computer still thiks throtel is closed even when you have the throtel open enough to run at higher rev's hence it hits rev limiter.

To set the TPS unplug it and check for continuaty between the 2 pins on 1 end "idl" and "e2" (can not remember if it is top 2 or bottom2 but the ones that conect with throtel closed) them set it so as they have continuaty with throtel closed but drops continuaty as so as you move the throtel a tiny bit (factory spec is 0.1 of a mm)
Do this and all will be good.

MATT.

[danny2]

THANKS HEAPS MAN!!

i really hope thats what the problem is.. i'll have a go tomorrow arvo and see how i go

cheers