CrazyAssRX7

Ok i have a n/a 90 gtu with rebuilt port an polish engine and i just put some bigger secondary injectors in and just today it's started acting weird



I played with the tps and tryed to adjust it but it did no help, my car just starts reving really low at .5 and stalled out on me 3 times



Do i need a new tps or what else can this be??? anything i missed when i put in the injectors?

pengaru

check for vacuum leaks.



You can test the TPS to see if it's going bad with a multimeter, you might also want to calibrate it if it checks out to be fine.

Turbo II

dont go buying a new tps, that **** is expensive, like pengaru said check for vacuum leaks. maybe u left some out when u installed the new injectors or buy a multimeter (cheap at radioshack) and test it out to see if its set right



see if this helps

CrazyAssRX7

im going to check out the multimeter but when i get it how do i test it???

CrazyAssRX7

it was a vaccum line i just got it and its better, but it stills does the revving at a higher level and just not all the time now, that must be the tps right???? or what else could it be

pengaru

It could be bad tps, it can also be tps out of adjustment. Do the tps adjustment (you'lll need to short the initial set coupler, and you'll probably want ot make the 2 LED TPS adjustment tool) I think fc3s-pro has a writeup on this.



Don't buy a new tps until you're sure it's bad, it's more likely that it's out of adjustment. After you make the LED tool it's pretty easy to check & adjust.

mazda_rx1986

vroom vrooooom

Turbo II

yes, those are expensive and really dont go bad. it prolly just needs adjustment, and for that u'll need a long screwdriver

pengaru

yup, ridiculously priced variable resistor.



ever played with slot cars? I doubt the controllers cost > $100 each, and they involve more complicated packaging. Just another variable resistor.

Turbo II

yup, screw the tps. with a carb'd motor