so ive bought a car that ended up being a total bust on me ( had to rebuild engine so i replaced clutch and various other thigs and catalyticconverter)

and my problem is that when i hold down the gas i get mini shakes every few seconds. especially going up hills. it also at random times speeds up a lot more like it gained a few more hp lol. ive also noticed it idles high while cold until it warms up.

now im thinking it could be a bad tps, or maybe fuel pump?


its a 94 gt

there are so many things it could be. fuel pump, fuel filter, dirt injectors, vacuum leak, bent valves, i mean so many things.

Faulty plug wires? They can intermittenly disconnect and reconnect and create the exact symptom you are describing.

My car did that when the dizzy pickup went bad. But it set off a CEL (OB1 vagueness ftw).